Class 5 Science Final Term

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Questions and Answers
  • 1. 

    The nervous system controls all other body systems and sense organs

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The nervous system is responsible for controlling and coordinating all other body systems and sense organs. It receives and processes information from the senses, sends signals to muscles and organs, and regulates bodily functions such as breathing, heart rate, and digestion. Without the nervous system, the body would not be able to respond to stimuli, communicate internally, or maintain homeostasis. Therefore, the statement that the nervous system controls all other body systems and sense organs is true.

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  • 2. 

    The nervous system consists of brain only

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement "The nervous system consists of the brain only" is incorrect. The nervous system is a complex network that includes not only the brain but also the spinal cord and a vast network of nerves throughout the body. The brain is indeed a crucial component of the nervous system, but it does not encompass the entire system on its own. The spinal cord plays a vital role in transmitting signals between the brain and the rest of the body, while the nerves facilitate communication between different parts of the body and the brain.

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  • 3. 

    Cerebellum is the largest part of human brain

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The given statement is false. The cerebellum is not the largest part of the human brain. The cerebellum is a smaller structure located at the back of the brain, underneath the cerebral hemispheres. The largest part of the human brain is the cerebrum, which is responsible for higher cognitive functions such as thinking, learning, and memory. The cerebellum, on the other hand, plays a crucial role in motor control, coordination, and balance.

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  • 4. 

    Medulla is also called brain stem

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because the medulla is indeed referred to as the brain stem. The medulla is the lowermost part of the brainstem and is responsible for controlling vital functions such as breathing, heart rate, and blood pressure. It connects the spinal cord to the rest of the brain and plays a crucial role in relaying signals between the brain and the body. Therefore, it is correct to say that the medulla is also known as the brain stem.

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  • 5. 

    Reflex actions are controlled by the brain

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Reflex actions are not controlled by the brain. They are automatic responses to stimuli that are mediated by the spinal cord and peripheral nerves. The brain may receive information about the reflex action after it has occurred, but it does not control the reflex itself.

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  • 6. 

    Which of the following organ system helps us to learn and think

    • A.

      Digestive System

    • B.

      Skeletal System

    • C.

      Nervous System

    • D.

      Muscular System

    Correct Answer
    C. Nervous System
    Explanation
    The nervous system is responsible for learning and thinking. It consists of the brain, spinal cord, and nerves, which work together to process information and send signals throughout the body. The brain is the main organ of the nervous system and is responsible for cognitive functions such as learning, memory, and problem-solving. The nervous system also controls the senses, allowing us to perceive and interpret the world around us. Overall, the nervous system plays a crucial role in our ability to learn and think.

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  • 7. 

    Which of the following organs helps us to taste

    • A.

      Eye

    • B.

      Ear

    • C.

      Nose

    • D.

      Tongue

    Correct Answer
    D. Tongue
    Explanation
    The tongue is the organ responsible for our sense of taste. It contains taste buds, which are specialized cells that detect different flavors such as sweet, sour, salty, and bitter. When we eat or drink something, the taste buds send signals to the brain, allowing us to perceive and differentiate between different tastes. The tongue also helps in the process of chewing and swallowing food.

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  • 8. 

    Which of the following is the largest part of the human brain

    • A.

      Cerebellum

    • B.

      Cerebrum

    • C.

      Medulla

    • D.

      Spinal Cord

    Correct Answer
    B. Cerebrum
    Explanation
    The cerebrum is the largest part of the human brain. It is responsible for higher cognitive functions such as memory, language, perception, and consciousness. It is divided into two hemispheres and is composed of various lobes, including the frontal, parietal, temporal, and occipital lobes. The cerebrum plays a crucial role in coordinating voluntary movements, processing sensory information, and controlling emotions and behavior. It is the center for intelligence, learning, and reasoning.

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  • 9. 

    Optic nerve carries message from the

    • A.

      Eyes

    • B.

      Ears

    • C.

      Nose

    • D.

      Skin

    Correct Answer
    A. Eyes
    Explanation
    The optic nerve carries messages from the eyes to the brain. It is responsible for transmitting visual information, allowing us to see and interpret our surroundings. This nerve connects the retina, which is located at the back of the eye, to the brain's visual cortex, where the information is processed and interpreted. Without the optic nerve, the brain would not receive any visual input, resulting in blindness.

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  • 10. 

    Which part of the brain helps in maintaining the balance of our body

    • A.

      Cerebrum

    • B.

      Cerebellum

    • C.

      Medulla

    • D.

      Spinal Cord

    Correct Answer
    B. Cerebellum
    Explanation
    The cerebellum is responsible for maintaining the balance of our body. It receives information from various sensory systems, including the inner ear, to coordinate and regulate movements. It plays a crucial role in controlling posture, muscle tone, and coordination, ensuring that we can stand, walk, and perform other motor activities without falling or losing balance. The cerebellum also helps in fine-tuning movements and adjusting them based on sensory feedback, making it an essential part of our motor control system.

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  • 11. 

    ..........Is the control centre of our body

    Correct Answer
    Brain
    Explanation
    The brain is the control center of our body as it is responsible for coordinating and controlling all bodily functions. It receives and processes information from our senses, allowing us to perceive and interact with the world around us. It also regulates and controls our thoughts, emotions, and behaviors. Additionally, the brain controls vital functions such as breathing, heart rate, and digestion. Without the brain, our body would not be able to function properly or survive.

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  • 12. 

    Medulla controls........... actions like breathing and digestion

    Correct Answer
    involuntary
    Explanation
    The medulla is a part of the brainstem that controls various involuntary actions in the body, such as breathing and digestion. It regulates these essential functions without conscious effort or control from the individual. The medulla also plays a crucial role in maintaining homeostasis by monitoring and adjusting blood pressure, heart rate, and other vital functions. Its involuntary control over these actions ensures the body's survival and proper functioning.

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  • 13. 

    Reflex actions are controlled by the ........

    Correct Answer
    spinal cord
    Explanation
    Reflex actions are rapid and involuntary responses to stimuli. These actions do not require conscious thought or decision-making processes. The spinal cord plays a crucial role in controlling reflex actions as it acts as a relay station between the sensory neurons and motor neurons. When a stimulus is detected by sensory neurons, the information is quickly transmitted to the spinal cord. The spinal cord then immediately sends signals to the appropriate muscles to produce the reflex action, bypassing the brain. This allows for swift and automatic responses to potentially harmful or dangerous situations.

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  • 14. 

    The ear has......... parts

    Correct Answer
    three
    Explanation
    The ear is composed of three main parts: the outer ear, the middle ear, and the inner ear. The outer ear consists of the visible part of the ear, known as the pinna, and the ear canal. The middle ear contains the eardrum and three small bones called the ossicles, which transmit sound vibrations. The inner ear includes the cochlea, responsible for converting sound vibrations into electrical signals, and the vestibular system, which helps with balance and spatial orientation. Overall, the ear has three distinct parts that work together to facilitate hearing and balance.

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  • 15. 

    The surface of the tongue has many .........

    Correct Answer
    taste buds
    Explanation
    The surface of the tongue is covered with taste buds, which are responsible for detecting different tastes such as sweet, sour, salty, and bitter. These taste buds contain specialized cells called gustatory cells that have receptors for specific taste molecules. When food or drink comes into contact with the taste buds, the gustatory cells send signals to the brain, allowing us to perceive and distinguish different flavors. Therefore, taste buds play a crucial role in our sense of taste.

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  • 16. 

    Name the part of nervous system which acts like telephone wire

    Correct Answer
    nerves
    Explanation
    The part of the nervous system that acts like a telephone wire is the nerves. Nerves are responsible for transmitting signals or messages between different parts of the body, similar to how a telephone wire carries information from one location to another. They serve as the communication network of the nervous system, allowing information to be relayed quickly and efficiently throughout the body.

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  • 17. 

    The part of brain which helps in thinking learning and reasoning

    Correct Answer
    cerebrum
    Explanation
    The cerebrum is the correct answer because it is the largest part of the brain and is responsible for higher cognitive functions such as thinking, learning, and reasoning. It is divided into two hemispheres and is involved in processing sensory information, initiating voluntary movements, and controlling language and speech. The cerebrum plays a crucial role in complex mental processes and is essential for our ability to think critically, learn new information, and make logical decisions.

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  • 18. 

    The coloured part of the eye

    Correct Answer
    iris
    Explanation
    The iris is the colored part of the eye that surrounds the pupil. It is responsible for controlling the amount of light that enters the eye by adjusting the size of the pupil. The iris contains muscles that contract or expand to regulate the size of the pupil, allowing more or less light to reach the retina. This helps to protect the delicate structures of the eye from excessive light and maintain clear vision in different lighting conditions.

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  • 19. 

    The organ which helps us to breathe and smell

    Correct Answer
    nose
    Explanation
    The nose is the organ that helps us to breathe and smell. It is located in the middle of the face, above the mouth. The nose contains two nostrils which allow air to enter and exit the body, facilitating the process of breathing. Additionally, the nose is lined with olfactory receptors that enable us to detect and identify different smells. These receptors send signals to the brain, allowing us to perceive and differentiate various scents. Overall, the nose plays a crucial role in our respiratory system and our sense of smell.

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  • 20. 

    Air is a mixture of gases

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Air is a mixture of gases because it is composed of various gases such as nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. These gases are not chemically combined but rather exist together in the atmosphere. This is evident from the fact that the composition of air can vary depending on location and altitude. Therefore, it can be concluded that air is indeed a mixture of gases.

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  • 21. 

    Oxygen is needed for putting out fire

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Oxygen is needed for combustion to occur, which is the chemical reaction that takes place during a fire. When a fire burns, it requires a continuous supply of oxygen to sustain the reaction. Without oxygen, the fire cannot continue to burn and will eventually be extinguished. Therefore, it is true that oxygen is needed for putting out a fire.

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  • 22. 

    Carbon dioxide is used in fire extinguishers

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Carbon dioxide is used in fire extinguishers because it is a non-flammable gas that can displace oxygen, effectively smothering the fire. When released from a fire extinguisher, carbon dioxide forms a blanket over the fire, preventing oxygen from reaching the fuel source and thus extinguishing the flames. This makes carbon dioxide an effective and commonly used agent in fire suppression systems.

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  • 23. 

    The atmosphere protects us from meteoroids

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The atmosphere protects us from meteoroids because it acts as a shield, burning up most small meteoroids as they enter Earth's atmosphere. The friction caused by the meteoroid's high speed through the atmosphere generates intense heat, causing it to vaporize and disintegrate before reaching the surface. However, larger meteoroids can still pose a threat and may reach the surface, causing damage upon impact.

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  • 24. 

    Air pressure helps us to drink juice using a straw

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Air pressure helps us to drink juice using a straw because when we suck on the straw, we create a low-pressure area inside the straw. The atmospheric pressure outside the straw is higher, so the juice is pushed up into the straw and into our mouth. This is possible because of the principle of fluid dynamics, where fluids move from areas of high pressure to areas of low pressure.

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  • 25. 

    What do we need to breathe

    • A.

      Air

    • B.

      Water

    • C.

      Milk

    • D.

      None of these

    Correct Answer
    A. Air
    Explanation
    Breathing is the process of taking in oxygen and releasing carbon dioxide. In order to do this, we need to inhale air, which contains oxygen. Oxygen is essential for our body's cells to function properly and carry out various metabolic processes. Water and milk are not sufficient to provide the necessary oxygen for respiration. Therefore, the correct answer is air.

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  • 26. 

    Which of the following gases supports burning

    • A.

      Nitrogen

    • B.

      Carbon Dioxide

    • C.

      Oxygen

    • D.

      Helium

    Correct Answer
    C. Oxygen
    Explanation
    Oxygen is the correct answer because it is a highly reactive gas that readily combines with other substances, including fuel, to support combustion. When oxygen is present, it reacts with the fuel and releases energy in the form of heat and light. This process is essential for burning to occur. Nitrogen, carbon dioxide, and helium do not support burning as they are relatively inert gases and do not readily react with other substances.

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  • 27. 

    Space shuttles Orbit in

    • A.

      Troposphere

    • B.

      Stratosphere

    • C.

      Mesosphere

    • D.

      Thermosphere

    Correct Answer
    D. Thermosphere
    Explanation
    Space shuttles orbit in the thermosphere because it is the layer of the Earth's atmosphere that is closest to outer space. The thermosphere is located above the mesosphere and extends from about 80 kilometers above the Earth's surface to the exosphere. It is characterized by high temperatures and low air density. Space shuttles orbit in this layer because it allows them to be above most of the Earth's atmosphere, minimizing atmospheric drag and allowing for smoother and more efficient orbits.

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  • 28. 

    The rate of sedimentation can be improved by adding

    • A.

      Sugar

    • B.

      Mud

    • C.

      Water

    • D.

      Alum

    Correct Answer
    D. Alum
    Explanation
    Alum can improve the rate of sedimentation because it acts as a flocculant, causing suspended particles in a liquid to come together and form larger, heavier particles. These larger particles settle more quickly, leading to faster sedimentation. Alum is commonly used in water treatment processes to remove impurities and clarify the water.

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  • 29. 

    Which of the following methods is used to get the purest form of water

    • A.

      Sedimentation

    • B.

      Distillation

    • C.

      Decantation

    • D.

      Filtration

    Correct Answer
    B. Distillation
    Explanation
    Distillation is the process used to obtain the purest form of water. It involves heating the water to its boiling point, causing it to evaporate. The vapor is then collected and condensed back into a liquid, leaving behind impurities and contaminants. This method is effective in removing minerals, chemicals, and other pollutants, resulting in water that is free from impurities and safe for consumption.

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  • 30. 

    Air exerts ...........

    Correct Answer
    pressure
    Explanation
    Air exerts pressure because it is made up of molecules that are constantly moving and colliding with each other and with surfaces around them. These collisions create a force that is exerted on the surfaces, which we perceive as pressure. The pressure exerted by air can be felt when we experience wind or when we blow up a balloon. It is also responsible for phenomena such as atmospheric pressure, which affects weather patterns and the functioning of our respiratory system.

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  • 31. 

    Ozone Layer lies in the

    Correct Answer
    stratosphere
    Explanation
    The ozone layer is located in the stratosphere. The stratosphere is the second layer of the Earth's atmosphere, located above the troposphere. It extends from about 10 to 50 kilometers above the Earth's surface. The ozone layer is a region within the stratosphere where the concentration of ozone molecules is relatively high. It plays a crucial role in absorbing and filtering out harmful ultraviolet (UV) radiation from the sun, protecting life on Earth.

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  • 32. 

    ................Impurities can be removed by evaporation

    Correct Answer
    soluble
    Explanation
    Impurities can be removed by evaporation because when a substance is soluble, it means that it can dissolve in a solvent. By heating the solution and evaporating the solvent, the dissolved impurities will be left behind, resulting in a purified substance.

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  • 33. 

    In exosphere, air is very ..........

    Correct Answer
    thin
    Explanation
    In the exosphere, the air is very thin. This is because the exosphere is the outermost layer of the Earth's atmosphere, extending beyond the thermosphere. It is composed of extremely low-density particles, such as hydrogen and helium, which are sparsely distributed. Due to the lack of gravitational pull at this altitude, the particles are able to escape into space more easily, resulting in a very thin atmosphere.

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  • 34. 

    Distilled water is used in car . ............

    Correct Answer
    battery
    Explanation
    Distilled water is used in car batteries to serve as an electrolyte. The electrolyte helps facilitate the chemical reactions that occur within the battery, allowing it to produce and store electrical energy. Distilled water is preferred for this purpose because it is free from impurities and minerals that could interfere with the battery's performance. Using tap water or other types of water can lead to the buildup of mineral deposits on the battery plates, reducing its efficiency and lifespan.

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  • 35. 

    The gas used in fire extinguishers

    Correct Answer
    carbon dioxide
    Explanation
    Carbon dioxide is commonly used in fire extinguishers because it is a non-flammable gas that can displace oxygen, effectively suffocating the fire. When released from the extinguisher, carbon dioxide forms a dense cloud that covers the fire, cutting off its oxygen supply and extinguishing it. Additionally, carbon dioxide does not leave any residue or damage to the surrounding area, making it a safe and effective choice for fire suppression.

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  • 36. 

    The first layer above the Earth's surface

    Correct Answer
    Troposphere
    Explanation
    The troposphere is the first layer above the Earth's surface. It is the lowest layer of the Earth's atmosphere and extends from the surface up to about 10-15 kilometers. This layer is where weather occurs and where most of the Earth's air mass is located. It contains the oxygen we breathe and provides the conditions necessary for life on Earth.

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  • 37. 

    Two methods used for removing soluble impurities; Evaporation

    Correct Answer
    Distillation
    Explanation
    Distillation is a method used for removing soluble impurities from a liquid mixture. It involves heating the mixture to vaporize the liquid with the lower boiling point, leaving behind the impurities. The vapor is then condensed and collected as a purified liquid. This process is effective for separating substances with different boiling points, allowing for the removal of impurities that have higher boiling points than the desired substance. Evaporation, on the other hand, is a process that involves heating a solution to remove the solvent, but it does not separate impurities based on their boiling points. Therefore, distillation is the more suitable method for removing soluble impurities.

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  • 38. 

    Two methods used for removing soluble impurities; Distillation 

    Correct Answer
    Evaporation
    Explanation
    Evaporation is a method used for removing soluble impurities from a solution. It involves heating the solution to a high temperature, causing the solvent to evaporate and leaving behind the impurities in the form of solid residue. This process is effective for separating substances with a large difference in boiling points. Distillation, on the other hand, is a method used for separating two or more liquids with different boiling points. It involves heating the mixture to vaporize the component with the lower boiling point, then cooling and condensing the vapor to collect the purified liquid. While both methods involve the removal of impurities, evaporation is specifically used for removing soluble impurities from a solution.

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  • 39. 

    The simplest way of purifying drinking water

    Correct Answer
    boiling
    Explanation
    Boiling is the simplest and most effective method of purifying drinking water. When water is boiled, it reaches a temperature that kills most types of bacteria, viruses, and parasites that may be present. Boiling also helps to remove any chemical contaminants that may be present in the water. This process is easy to do and does not require any special equipment or chemicals. Therefore, boiling is a reliable and accessible method for purifying drinking water, making it the correct answer.

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  • 40. 

    Name two diseases caused by drinking dirty water; Jaundice

    Correct Answer
    cholera
    Explanation
    Cholera is a waterborne disease caused by the bacterium Vibrio cholerae. It is transmitted through contaminated water or food, particularly in areas with poor sanitation. The bacteria produce toxins that cause severe diarrhea and vomiting, leading to dehydration and potentially death if left untreated. Jaundice, on the other hand, is not directly caused by drinking dirty water. It is a symptom of various underlying conditions, such as liver disease or hepatitis, which can be transmitted through contaminated water but are not exclusively caused by it.

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  • 41. 

    Name two diseases caused by drinking dirty water; cholera

    Correct Answer
    jaundice
    Explanation
    Jaundice is a disease that can be caused by drinking dirty water contaminated with certain viruses, bacteria, or parasites. It is characterized by yellowing of the skin and eyes due to the buildup of bilirubin in the body. Cholera, on the other hand, is caused by the bacterium Vibrio cholerae and is typically transmitted through contaminated water or food. It leads to severe diarrhea and dehydration. Both diseases highlight the importance of clean and safe drinking water to prevent waterborne illnesses.

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  • 42. 

    The earth is fourth planet in the solar system

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The earth is not the fourth planet in the solar system. It is the third planet from the sun. The correct answer is False.

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  • 43. 

    The outermost layer of the Earth is crust

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The outermost layer of the Earth is called the crust. This layer is relatively thin compared to the other layers of the Earth, such as the mantle and the core. The crust is made up of solid rock and is divided into two types: continental crust, which is thicker and less dense, and oceanic crust, which is thinner and denser. The crust is the layer where all the Earth's landforms, such as mountains, valleys, and plateaus, are formed. It is also where all life on Earth exists, as it provides a solid surface for living organisms. Therefore, the statement "The outermost layer of the Earth is crust" is true.

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  • 44. 

    The core is the coldest part of the Sun

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The core of the Sun is actually the hottest part, where nuclear fusion occurs. This is where hydrogen atoms combine to form helium, releasing a tremendous amount of energy in the process. The temperature in the core can reach up to 15 million degrees Celsius.

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  • 45. 

    Sun is the star nearest to the earth

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement "Sun is the star nearest to the earth" is true because the Sun is the closest star to our planet. It is located about 93 million miles away from Earth and is the primary source of light and heat for our planet. While there are billions of other stars in the universe, the Sun's proximity to Earth makes it the nearest star.

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  • 46. 

    The inner core of the Earth is made up of iron

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The inner core of the Earth is made up of iron because it is the densest part of the Earth. It is believed to be a solid ball of mostly iron and nickel, with smaller amounts of other elements. This is supported by seismic data and the behavior of seismic waves as they pass through the Earth. The high pressure in the inner core keeps the iron solid despite its extremely high temperature.

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  • 47. 

    Which of the following has air water and land

    • A.

      Earth

    • B.

      Sun

    • C.

      Moon

    • D.

      All of these

    Correct Answer
    A. Earth
    Explanation
    Earth is the correct answer because it is the only option that has air, water, and land. The Sun is a star and does not have a solid surface or water, while the Moon does not have an atmosphere or significant amounts of liquid water. Earth, on the other hand, has all three components - air in the form of the atmosphere, water in the form of oceans and other bodies of water, and land in the form of continents and islands. Therefore, Earth is the only option that satisfies the condition of having air, water, and land.

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  • 48. 

    Which of the following is the outermost layer of the earth

    • A.

      Mantle

    • B.

      Outer core

    • C.

      Inner Core

    • D.

      Crust

    Correct Answer
    D. Crust
    Explanation
    The crust is the outermost layer of the Earth. It is the thinnest layer and is made up of solid rock. It is divided into two types: continental crust and oceanic crust. The continental crust is thicker and less dense, while the oceanic crust is thinner and more dense. The crust is where we live and is the layer that we interact with on a daily basis. It is also where most geological processes, such as earthquakes and volcanic activity, occur.

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  • 49. 

    Magma comes out from

    • A.

      Outer core

    • B.

      Inner Core

    • C.

      Mantle

    • D.

      Crust

    Correct Answer
    C. Mantle
    Explanation
    Magma is a molten rock material that is formed beneath the Earth's surface. It is generated from the partial melting of the mantle, which is the layer located between the crust and the outer core. The mantle consists of semi-solid rock material that experiences high temperatures and pressure, causing some of it to melt and form magma. This magma then rises towards the Earth's surface through cracks and fractures in the crust, eventually leading to volcanic eruptions or forming igneous rocks when it cools and solidifies.

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  • 50. 

    Who was the first man to step on the moon

    • A.

      Neil Armstrong

    • B.

      Edwin Aldrin

    • C.

      Michael Collins

    • D.

      Yuri Gagrin

    Correct Answer
    A. Neil Armstrong
    Explanation
    Neil Armstrong is the correct answer because he was the first man to step on the moon. On July 20, 1969, Armstrong, along with Buzz Aldrin, became the first astronauts to land on the moon as part of NASA's Apollo 11 mission. Armstrong famously took the first step onto the lunar surface and uttered the iconic words, "That's one small step for man, one giant leap for mankind." His historic achievement marked a significant milestone in human space exploration.

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

  • Current Version
  • Aug 17, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 22, 2018
    Quiz Created by
    Manojokha

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