Science Trivia Quiz: Can You Survive This Hardest Test?

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
Learn about Our Editorial Process
| By Catherine Halcomb
C
Catherine Halcomb
Community Contributor
Quizzes Created: 1428 | Total Attempts: 5,897,934
Questions: 95 | Attempts: 513

SettingsSettingsSettings
Science Trivia Quiz: Can You Survive This Hardest Test? - Quiz

Below is a science trivia quiz: can you survive the hardest test? The cells are the building blocks of the human body. If you have a good understanding of science, you understand not only the environment but also how things work. If you get the full marks in this quiz, you should consider yourself quite smart. Test yourself not and look for other quizzes just like it!


Questions and Answers
  • 1. 

    The __________________ catches sound waves and funnels them in toward the eardrum.

    • A.

      Hammer

    • B.

      Outer ear

    • C.

      Cochlea

    • D.

      Auditory never

    Correct Answer
    B. Outer ear
    Explanation
    The outer ear catches sound waves and funnels them in toward the eardrum. It consists of the pinna, which acts as a funnel to collect sound waves, and the ear canal, which directs the sound waves towards the eardrum. The outer ear plays a crucial role in capturing and transmitting sound to the middle ear for further processing.

    Rate this question:

  • 2. 

    Which is NOT one of the three tiny bones in the ear?

    • A.

      Hammer

    • B.

      Anvil

    • C.

      Cochlea

    • D.

      Stirrup

    Correct Answer
    C. Cochlea
    Explanation
    The cochlea is not one of the three tiny bones in the ear. The three tiny bones in the ear are called the hammer, anvil, and stirrup, also known as the ossicles. These bones are located in the middle ear and are responsible for transmitting sound vibrations from the eardrum to the inner ear. The cochlea, on the other hand, is a spiral-shaped structure in the inner ear that is responsible for converting sound vibrations into electrical signals that can be interpreted by the brain.

    Rate this question:

  • 3. 

    Sound waves make the ___________________________vibrate first.

    • A.

      Eardrum

    • B.

      Outer ear

    • C.

      Brain signals

    • D.

      Auditory nerve

    Correct Answer
    A. Eardrum
    Explanation
    Sound waves make the eardrum vibrate first. The eardrum is a thin membrane located in the middle ear that separates the outer ear from the middle ear. When sound waves enter the ear, they cause the eardrum to vibrate. This vibration is then transmitted to the small bones in the middle ear, known as the ossicles, which amplify the sound and send it to the inner ear. From there, the sound is converted into electrical signals that can be interpreted by the brain as sound.

    Rate this question:

  • 4. 

    The shell-shaped organ to which bones pass vibrations is the _______________________________.

    • A.

      Stirrup

    • B.

      Hammer

    • C.

      Anvil

    • D.

      Cochlea

    Correct Answer
    D. Cochlea
    Explanation
    The cochlea is a shell-shaped organ in the inner ear that receives vibrations from the bones of the middle ear, specifically the hammer, anvil, and stirrup. These vibrations are then converted into electrical signals that can be interpreted by the brain as sound. The cochlea contains thousands of tiny hair cells that are responsible for detecting different frequencies of sound, allowing us to perceive a wide range of auditory stimuli.

    Rate this question:

  • 5. 

    Hairlike cells inside the cochlea change vibrations into ________________________.

    • A.

      Vibrations

    • B.

      Nerve signals

    • C.

      Brain waves

    • D.

      Sounds

    Correct Answer
    B. Nerve signals
    Explanation
    Hairlike cells inside the cochlea are responsible for converting vibrations into nerve signals. These cells, known as hair cells, are sensitive to the vibrations caused by sound waves. When these vibrations reach the cochlea, the hair cells move and stimulate the auditory nerve, which then transmits signals to the brain. This process allows us to perceive and interpret sounds.

    Rate this question:

  • 6. 

    Nerve signals trom the cochlea travel along the __________________________ to your brain.

    • A.

      Auditory nerve

    • B.

      Eardrum

    • C.

      Brain wave

    • D.

      Outer ear

    Correct Answer
    A. Auditory nerve
    Explanation
    Nerve signals from the cochlea, which is a part of the inner ear responsible for hearing, travel along the auditory nerve to reach the brain. The auditory nerve carries these signals to the brain, where they are processed and interpreted as sound. This pathway allows us to perceive and understand the sounds we hear. The eardrum, brain wave, and outer ear are not directly involved in transmitting these signals to the brain.

    Rate this question:

  • 7. 

    A special part of your ____________________ recognizes the sound.

    • A.

      Eardrum

    • B.

      Cochlea

    • C.

      Brain

    • D.

      Outer ear

    Correct Answer
    C. Brain
    Explanation
    The brain is responsible for recognizing sound. While the outer ear collects sound waves and the eardrum vibrates in response to these waves, it is the cochlea in the inner ear that converts these vibrations into electrical signals. These signals are then sent to the brain, specifically the auditory cortex, where they are processed and interpreted as sound. Therefore, the brain plays a crucial role in recognizing and perceiving sound.

    Rate this question:

  • 8. 

    What is letter B?

    • A.

      Optic Nerve

    • B.

      Retina

    • C.

      Cornea

    • D.

      Sclera

    Correct Answer
    B. Retina
    Explanation
    The retina is the correct answer because it is a layer of tissue located at the back of the eye that contains cells called photoreceptors. These photoreceptors detect light and send electrical signals to the brain through the optic nerve, allowing us to see. The optic nerve, cornea, and sclera are all parts of the eye, but they do not specifically refer to letter B in the question.

    Rate this question:

  • 9. 

    What is letter E?

    • A.

      Cornea

    • B.

      Iris

    • C.

      Optic Nerve

    • D.

      Sclera

    Correct Answer
    A. Cornea
    Explanation
    The cornea is the transparent, dome-shaped outermost layer of the eye that covers the iris, pupil, and anterior chamber. It plays a crucial role in focusing light onto the retina, allowing us to see clearly. The cornea is responsible for about two-thirds of the eye's total focusing power. It also acts as a protective barrier against dust, germs, and other foreign particles. Therefore, the cornea is an essential part of the eye and is the correct answer to the question.

    Rate this question:

  • 10. 

    What is letter F?

    • A.

      Cornea

    • B.

      Pupil

    • C.

      Optic Nerve

    • D.

      Retina

    Correct Answer
    B. Pupil
    Explanation
    The correct answer is Pupil. The question is asking for the letter F, and out of the given options, only Pupil starts with the letter F. The other options, Cornea, Optic Nerve, and Retina, do not start with the letter F. Therefore, Pupil is the correct answer.

    Rate this question:

  • 11. 

    What is letter G?

    • A.

      Optic Nerve

    • B.

      Vitreous Humour

    • C.

      Lens

    • D.

      Sclera

    Correct Answer
    C. Lens
    Explanation
    The letter G is referring to the lens. The lens is a transparent structure located behind the iris and is responsible for focusing light onto the retina. It plays a crucial role in the process of vision by adjusting its shape to allow for clear and sharp images at different distances.

    Rate this question:

  • 12. 

    What is letter H?

    • A.

      Retina

    • B.

      Lens

    • C.

      Pupil

    • D.

      Iris

    Correct Answer
    D. Iris
    Explanation
    The iris is the correct answer because it is a part of the eye that controls the size of the pupil and regulates the amount of light entering the eye. It is a circular, colored membrane located between the cornea and the lens. The iris contains muscles that contract or expand to adjust the size of the pupil, allowing more or less light to enter the eye.

    Rate this question:

  • 13. 

    A rope, a wheel with a groove in it and a weight make up this simple machine. You can pull down on the rope to lift the weight.

    Correct Answer
    pulley, pully
    Explanation
    A pulley is a simple machine that consists of a wheel with a groove in it. By pulling down on the rope that is threaded through the groove, you can lift the weight. Therefore, the correct answer is pulley, which refers to the wheel with a groove, and pully, which is likely a misspelling of pulley.

    Rate this question:

  • 14. 

    These simple machines are wheels with teeth on them that fit together when the simple machines are turned. These simple machines are used to increase or decrease turning power by changing their size.

    Correct Answer
    gears, gear, geer, geers
    Explanation
    Gears are simple machines with teeth that fit together when turned. They are used to increase or decrease turning power by changing their size.

    Rate this question:

  • 15. 

    This simple machine can be used to split things apart or hold a door open.

    Correct Answer
    wedge
    Explanation
    A wedge is a simple machine that can be used to split things apart or hold a door open. It has a triangular shape with a sharp edge, which allows it to apply a concentrated force to separate objects or keep a door from closing. When a wedge is inserted into a narrow space and force is applied to it, the objects on either side of the wedge are pushed apart. This makes it a useful tool for tasks such as splitting wood or holding a door in place.

    Rate this question:

  • 16. 

    What is the female part of a flower?

    • A.

      Anther

    • B.

      Stigma

    • C.

      Petal

    Correct Answer
    B. Stigma
    Explanation
    The stigma is the female part of a flower. It is located at the top of the pistil and is responsible for receiving pollen during pollination. The stigma is often sticky or feathery, which helps it to capture pollen grains. Once the pollen lands on the stigma, it can then travel down the style and reach the ovary for fertilization to occur.

    Rate this question:

  • 17. 

    Bees are the only way a plant gets pollen?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    This statement is false because bees are not the only way a plant gets pollen. While bees are important pollinators for many plants, there are also other insects, birds, bats, and even wind that can transfer pollen between plants. Therefore, bees are not the sole means of pollination for plants.

    Rate this question:

  • 18. 

    What does a plant root do?

    • A.

      Turn carbon dioxide and water into food

    • B.

      Takes in water and nutrients from the soil

    • C.

      Holds up the leaves

    • D.

      Attract insects to help spread pollen

    Correct Answer
    B. Takes in water and nutrients from the soil
    Explanation
    Plant roots play a crucial role in taking in water and nutrients from the soil. They have specialized structures, such as root hairs, which increase the surface area for absorption. This process, known as root absorption, allows plants to obtain essential elements like nitrogen, phosphorus, and potassium, as well as water, which are necessary for growth and development. Roots also anchor the plant in the soil, providing stability and support. Therefore, the correct answer is that plant roots take in water and nutrients from the soil.

    Rate this question:

  • 19. 

    Which structure help plants reproduce and spread?

    • A.

      Roots, stem, and leaves

    • B.

      Leaves, needles and spines

    • C.

      Seeds, flowers and fruits

    • D.

      Stems, stalks, and spines

    Correct Answer
    C. Seeds, flowers and fruits
    Explanation
    Seeds, flowers, and fruits are the structures that help plants reproduce and spread. Seeds are the reproductive structures that contain the embryo of a new plant and are dispersed to new locations for germination. Flowers are the reproductive organs of plants that produce pollen and attract pollinators for fertilization. Fruits are the mature ovaries of flowers that protect and disperse seeds. Together, these structures play a crucial role in the reproductive success and dispersal of plants.

    Rate this question:

  • 20. 

    Corn kernels, beans and peas are examples of ...

    • A.

      Seeds

    • B.

      Fruit

    • C.

      Leaves

    • D.

      Stems

    Correct Answer
    A. Seeds
    Explanation
    Corn kernels, beans, and peas are examples of seeds. Seeds are the reproductive structures of plants that contain the embryonic plant inside. These structures are typically enclosed in a protective seed coat and are responsible for the propagation and continuation of the plant species. Corn kernels, beans, and peas all have the potential to germinate and grow into new plants, making them examples of seeds.

    Rate this question:

  • 21. 

    In which structure of a plant does most photosynthesis take place?

    • A.

      Roots

    • B.

      Stem

    • C.

      Xylem

    • D.

      Leaves

    Correct Answer
    D. Leaves
    Explanation
    Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. This process primarily occurs in the leaves of a plant. Leaves have specialized structures called chloroplasts, which contain chlorophyll, the pigment responsible for capturing sunlight. These chloroplasts are abundant in the mesophyll cells of the leaf, where most of the photosynthesis takes place. The large surface area of leaves allows for maximum exposure to sunlight, making them the primary site for photosynthesis in plants.

    Rate this question:

  • 22. 

    Metamorphic rocks are formed from

    • A.

      The remain of sea creatures

    • B.

      The cooling of lava

    • C.

      Great heat and pressure in the earth

    • D.

      The remaining of other rocks

    Correct Answer
    C. Great heat and pressure in the earth
    Explanation
    Metamorphic rocks are formed from great heat and pressure in the earth. This process causes the existing rocks to undergo significant changes in their structure, texture, and mineral composition. The intense heat and pressure cause the minerals within the rocks to recrystallize, resulting in the formation of new minerals and a distinct metamorphic texture. This process typically occurs deep within the Earth's crust, where the temperatures and pressures are high enough to facilitate these transformations. Therefore, the correct answer is great heat and pressure in the earth.

    Rate this question:

  • 23. 

    Two type sof metamorphic rocks are

    • A.

      Gneiss and Marble

    • B.

      Granite and Quartz

    • C.

      Slate Organic

    • D.

      Marble and Clastic

    Correct Answer
    A. Gneiss and Marble
    Explanation
    Gneiss and Marble are both types of metamorphic rocks. Gneiss is a foliated rock that forms from the metamorphism of granite or other igneous rocks. It has distinct layers or bands of different minerals. Marble, on the other hand, is a non-foliated rock that forms from the metamorphism of limestone or dolomite. It is composed mostly of calcite and has a smooth texture. Both Gneiss and Marble are widely used in construction and sculpture due to their durability and aesthetic appeal.

    Rate this question:

  • 24. 

    Two type of sedimentary rocks are limestones and sandstones.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Limestones and sandstones are indeed two types of sedimentary rocks. Limestone is formed from the accumulation of shells, coral, and other organic materials, while sandstone is formed from the compaction and cementation of sand grains. Both rocks are commonly found in various geological formations and have distinct characteristics that make them easily identifiable. Therefore, the statement "Two types of sedimentary rocks are limestones and sandstones" is true.

    Rate this question:

  • 25. 

    Metamorphic rocks are formed from

    • A.

      The remain of sea creatures

    • B.

      The cooling of lava

    • C.

      Great heat and pressure in the earth

    • D.

      The remaining of other rocks

    Correct Answer
    C. Great heat and pressure in the earth
    Explanation
    Metamorphic rocks are formed through the process of great heat and pressure in the earth. This occurs when existing rocks are subjected to intense heat and pressure, causing them to undergo physical and chemical changes. The high temperatures and pressures cause the minerals within the rocks to recrystallize, resulting in the formation of new minerals and a different texture. This process can occur deep within the Earth's crust or during tectonic activity such as mountain building. Therefore, the correct answer is great heat and pressure in the earth.

    Rate this question:

  • 26. 

    Metamorphic rocks are used to make jewelery.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Metamorphic rocks, such as jade, garnet, and marble, are indeed used to make jewelry. These rocks undergo intense heat and pressure over time, causing them to transform and form beautiful patterns and colors. Due to their durability and unique appearance, metamorphic rocks are highly valued in the jewelry industry and are commonly used in the creation of necklaces, earrings, rings, and other accessories.

    Rate this question:

  • 27. 

    A Cataract is:

    • A.

      A rare tumor of the eye

    • B.

      A growth in the eye caused by fever

    • C.

      A contagious skin lesion

    • D.

      A normal aging change in the lens

    Correct Answer
    D. A normal aging change in the lens
    Explanation
    A cataract is a normal aging change in the lens of the eye. As a person gets older, the proteins in the lens of the eye can start to clump together, causing the lens to become cloudy. This cloudiness can impair vision and make objects appear blurry or hazy. Cataracts are a common condition that usually develop slowly over time and can be treated with surgery to remove the cloudy lens and replace it with an artificial one. It is not a rare tumor, a growth caused by fever, or a contagious skin lesion.

    Rate this question:

  • 28. 

    A medical doctor who treats diseases and performs surgery on the eye is

    • A.

      An optimist

    • B.

      An optometrist

    • C.

      An ophthalmologist

    • D.

      An optician

    Correct Answer
    C. An ophthalmologist
    Explanation
    An ophthalmologist is a medical doctor who specializes in treating diseases and performing surgery on the eye. They have completed extensive education and training in the field of ophthalmology, which focuses on the diagnosis and treatment of eye conditions. Unlike an optometrist or optician, an ophthalmologist is qualified to perform surgical procedures on the eye, making them the correct answer for this question.

    Rate this question:

  • 29. 

    The part of the eye on which images are focused like the film in a camera is

    • A.

      The Retina

    • B.

      The Lens

    • C.

      The Cornea

    • D.

      The Pupil

    Correct Answer
    A. The Retina
    Explanation
    The retina is the correct answer because it is the part of the eye on which images are focused, similar to the film in a camera. The retina contains specialized cells called photoreceptors that convert light into electrical signals, which are then transmitted to the brain through the optic nerve for processing and interpretation. This process allows us to see and perceive the visual world around us.

    Rate this question:

  • 30. 

    The structure which connects the eye to the brain is:

    • A.

      The Retina

    • B.

      The Optic Nerve

    • C.

      The Stroma

    • D.

      The Cornea

    Correct Answer
    B. The Optic Nerve
    Explanation
    The optic nerve is the correct answer because it is the structure that connects the eye to the brain. It is responsible for transmitting visual information from the retina to the brain, allowing us to perceive and interpret what we see. The retina, on the other hand, is a layer of tissue located at the back of the eye that contains light-sensitive cells. The stroma is a part of the cornea, which is the transparent front part of the eye. Therefore, the optic nerve is the correct structure that connects the eye to the brain.

    Rate this question:

  • 31. 

    Which structure produces tears during crying?

    • A.

      Lens

    • B.

      Eyelash

    • C.

      Lacrimal Gland

    • D.

      Cornea

    Correct Answer
    C. Lacrimal Gland
    Explanation
    The lacrimal gland is responsible for producing tears during crying. Tears are essential for lubricating the eyes and keeping them moist. When we cry, the lacrimal gland is stimulated to produce tears, which then flow down the surface of the eye and eventually drain through the tear ducts. The other structures mentioned, such as the lens, eyelash, and cornea, do not directly produce tears.

    Rate this question:

  • 32. 

    Which structure regulates the amount of light entering the eye?

    • A.

      Sclera

    • B.

      Retina

    • C.

      Lens

    • D.

      Pupil

    Correct Answer
    D. Pupil
    Explanation
    The pupil is the correct answer because it is the structure that regulates the amount of light entering the eye. The pupil is the black circular opening in the center of the iris, and it can change in size to control the amount of light that reaches the retina at the back of the eye. In bright light, the pupil constricts to reduce the amount of light entering the eye, while in dim light, the pupil dilates to allow more light in for better vision.

    Rate this question:

  • 33. 

    What is letter I?

    • A.

      Iris

    • B.

      Vitreous Humour

    • C.

      Optic Nerve

    • D.

      Cornea

    Correct Answer
    C. Optic Nerve
    Explanation
    The correct answer is Optic Nerve because the question is asking for a letter, and the only option that starts with the letter "I" is Iris. However, the question is incomplete and does not provide enough information to determine the correct answer.

    Rate this question:

  • 34. 

    A is pointing to what taste bud?

    • A.

      Sweet

    • B.

      Sour

    • C.

      Bitter

    • D.

      Salty

    Correct Answer
    C. Bitter
    Explanation
    A is pointing to the bitter taste bud.

    Rate this question:

  • 35. 

    C is pointing to what taste bud?

    • A.

      Sweet

    • B.

      Sour

    • C.

      Bitter

    • D.

      Salty

    Correct Answer
    D. Salty
    Explanation
    C is pointing to the taste bud that is responsible for detecting the taste of saltiness. The taste bud is specifically designed to respond to the presence of sodium ions in food, which gives it a distinct salty taste. When food containing salt comes into contact with this taste bud, it sends signals to the brain, allowing us to perceive the taste of salt.

    Rate this question:

  • 36. 

    D is pointing to what taste bud?

    • A.

      Sweet

    • B.

      Sour

    • C.

      Bitter

    • D.

      Salty

    Correct Answer
    A. Sweet
    Explanation
    Based on the question, it is asking which taste bud D is pointing to. Since the answer is "Sweet," it can be inferred that D is pointing to the taste bud responsible for detecting sweet flavors.

    Rate this question:

  • 37. 

    B is pointing to what taste bud?

    • A.

      Sweet

    • B.

      Sour

    • C.

      Bitter

    • D.

      Salty

    Correct Answer
    B. Sour
    Explanation
    B is pointing to the taste bud that is responsible for sensing sour taste. The taste buds on our tongues are responsible for detecting different tastes, including sweet, sour, bitter, and salty. In this case, B specifically indicates the taste bud that is associated with the perception of sour taste.

    Rate this question:

  • 38. 

    True or FalseLight enters the eye through the pupil.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement "Light enters the eye through the pupil" is true. The pupil is the opening in the center of the iris, and it regulates the amount of light that enters the eye. When there is a bright environment, the pupil constricts to reduce the amount of light entering the eye, and when it is dark, the pupil dilates to allow more light in. Therefore, light indeed enters the eye through the pupil.

    Rate this question:

  • 39. 

    These two parts act as one simple machine. They roll and are found on cars, bikes and wheelbarrows.

    Correct Answer
    wheel and axle, wheel axle
    Explanation
    The two parts described in the question, which roll and are found on cars, bikes, and wheelbarrows, are known as a wheel and axle. The wheel is the circular part that rotates, while the axle is the rod or shaft that goes through the center of the wheel, allowing it to rotate. Together, they form a simple machine that helps in the movement and transportation of various vehicles.

    Rate this question:

  • 40. 

    This simple machine can be used to lift a weight. It has a fulcrum, or pivot point, which can be located in the center, near the end or at the end of this simple machine.

    Correct Answer
    lever, leaver
    Explanation
    A lever is a simple machine that can be used to lift a weight. It has a fulcrum, or pivot point, which can be located in the center, near the end, or at the end of the lever. A leaver is not a correct term and does not exist.

    Rate this question:

  • 41. 

    Door on hinges is an example of what simple machine?

    • A.

      Inclined plane

    • B.

      Wheel and axle

    • C.

      Wedge

    • D.

      Lever

    Correct Answer
    D. Lever
    Explanation
    A door on hinges is an example of a lever because it rotates around a fixed point (the hinge) when force is applied to it. The door handle acts as the effort force, the hinge acts as the fulcrum, and the weight of the door acts as the load. By pushing or pulling on the handle, we can easily open or close the door, demonstrating the principles of a lever.

    Rate this question:

  • 42. 

    Stairs are an example of what kind of simple machine? 

    • A.

      Inclined plane

    • B.

      Wheel and axle

    • C.

      Wedge

    • D.

      Lever

    Correct Answer
    A. Inclined plane
    Explanation
    Stairs are an example of an inclined plane because they allow us to move between different levels by gradually increasing or decreasing the height. An inclined plane is a simple machine that reduces the force required to lift or lower an object by spreading the work over a longer distance. In the case of stairs, the inclined plane is formed by the sloping surface that connects the different steps, making it easier for us to climb or descend.

    Rate this question:

  • 43. 

    A light bulb is an example of what kind of simple machine?

    • A.

      Screw

    • B.

      Wheel and axle

    • C.

      Pulley

    • D.

      Screw

    Correct Answer
    D. Screw
    Explanation
    A light bulb is an example of a screw because it has a threaded base that allows it to be easily screwed into a socket. The threads on the bulb and the socket create a mechanical advantage, making it easier to install and remove the bulb.

    Rate this question:

  • 44. 

    A crane is an example of what kind of simple machine?

    • A.

      Inclined plane

    • B.

      Wheel and axle

    • C.

      Pulley

    • D.

      Lever

    Correct Answer
    C. Pulley
    Explanation
    A crane is an example of a pulley because it uses a system of ropes and wheels to lift and move heavy objects. The pulley allows for a mechanical advantage, making it easier to lift the load by distributing the weight and reducing the amount of force needed. Cranes typically have multiple pulleys, which further increase their lifting capacity. Therefore, a pulley is the correct simple machine that best describes a crane.

    Rate this question:

  • 45. 

    A door knob is an example of what kind of simple machine?

    • A.

      Inclined plane

    • B.

      Wheel and axle

    • C.

      Wedge

    • D.

      Lever

    Correct Answer
    B. Wheel and axle
    Explanation
    A door knob is an example of a wheel and axle because it consists of a circular knob (the wheel) that is attached to a shaft (the axle). When the knob is turned, the axle rotates, allowing the door to open or close. This simple machine allows for the application of force at a larger radius (the knob) to generate a greater torque at a smaller radius (the axle), making it easier to operate the door.

    Rate this question:

  • 46. 

    An axe is an example of what kind of simple machine?

    • A.

      Inclined plane

    • B.

      Wheel and axle

    • C.

      Wedge

    • D.

      Lever

    Correct Answer
    C. Wedge
    Explanation
    An axe is an example of a wedge because it has a sharp, triangular-shaped blade that is used to cut or split objects by applying force to a small area. The shape of the wedge allows it to concentrate force and apply it in a specific direction, making it an effective tool for tasks such as chopping wood or cutting through materials.

    Rate this question:

  • 47. 

    A knife is an example of which TWO (2) of the following

    • A.

      Inclined plane

    • B.

      Wheel and axle

    • C.

      Wedge

    • D.

      Pulley

    • E.

      Lever

    Correct Answer(s)
    C. Wedge
    E. Lever
    Explanation
    A knife can be considered an example of a wedge because of its shape, which tapers to a thin edge. This allows the knife to easily penetrate and cut through materials. Additionally, a knife can also be considered an example of a lever. When using a knife, the handle acts as a lever arm, providing a mechanical advantage to the user and making it easier to apply force to the blade.

    Rate this question:

  • 48. 

    Which part of the flower contains most of the pollen?

    • A.

      Anther

    • B.

      Stigma

    • C.

      Filament

    • D.

      Petal

    Correct Answer
    A. Anther
    Explanation
    The anther is the part of the flower that contains the most pollen. It is located at the top of the filament, which is the stalk-like structure that holds the anther. The anther produces and releases pollen grains, which are necessary for the process of pollination. The stigma, on the other hand, is the sticky part of the flower that receives pollen grains during pollination. The filament is responsible for supporting the anther and positioning it in a way that maximizes the chances of pollination. Petals, although they play a role in attracting pollinators, do not contain pollen.

    Rate this question:

  • 49. 

    What parts does the stamen consist of?

    • A.

      Filament and anther

    • B.

      Anther and stigma

    • C.

      Fiament and petal

    • D.

      Anther and petal

    Correct Answer
    A. Filament and anther
    Explanation
    The stamen is the male reproductive organ of a flower. It consists of two main parts: the filament and the anther. The filament is a long, slender stalk that supports the anther. The anther is a sac-like structure at the top of the filament that contains pollen grains. Together, the filament and anther play a crucial role in the process of pollination and fertilization in plants.

    Rate this question:

  • 50. 

    Which is a plant root that people eat?

    • A.

      Bean

    • B.

      Tomato

    • C.

      Cabbage

    • D.

      Carrot

    Correct Answer
    D. Carrot
    Explanation
    Carrot is a plant root that people commonly eat. It is a popular vegetable known for its sweet and crunchy texture. Carrots are rich in nutrients such as vitamin A, vitamin K, and fiber, making them a healthy addition to any diet. They can be eaten raw, cooked, or used in various dishes and recipes.

    Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 15, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 17, 2017
    Quiz Created by
    Catherine Halcomb
Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.