# Science 7 - 3rd Quarter Test

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Physics is a science that deals with the structure of matter and the interactions between the fundamental constituents of the observable universe. Being that we just started on the first physics class it is important to ensure that you are on your toes with all you learnt. Take the quiz and test yourself.

• 1.

### Energy is defined as the ability to _______________.

• A.

Create thrust

• B.

Do work

• C.

Create electricity

• D.

Exercise vigorously

B. Do work
Explanation
Energy is defined as the ability to do work. Work is the transfer of energy from one object to another, or the application of a force over a distance. Energy enables objects to perform tasks or cause changes in their surroundings. It can be converted from one form to another, but it is always associated with the capacity to do work. Therefore, the ability to do work is an essential characteristic of energy.

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• 2.

### Work is done when an object ___________, so energy is the ability to move ______________.

• A.

Moves / an object

• B.

Is electrified / electrons

• C.

Is in motion / from kinetics to potential

• D.

Comes to rest / quickly

A. Moves / an object
Explanation
When an object moves, work is done because energy is the ability to move an object. This means that when an object is in motion, it has the capacity to perform work by transferring energy to another object or system.

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• 3.

### Energy can exist in two forms: energy of ____________ and energy of _____________.

• A.

Promotion / subdivision

• B.

Position / superposition

• C.

Superstition / motion

• D.

Motion / position

• E.

Flotation / submersion

D. Motion / position
Explanation
Energy can exist in two forms: energy of motion and energy of position. Motion refers to the movement of an object, while position refers to the location or arrangement of an object. Energy of motion is the energy possessed by an object due to its movement, while energy of position is the energy possessed by an object due to its position or configuration in a system.

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• 4.

### Another word for energy of motion is ______________.

• A.

Kinetic energy

• B.

Kindred energy

• C.

Potential energy

• D.

Positive energy

A. Kinetic energy
Explanation
Kinetic energy refers to the energy possessed by an object due to its motion. It is the energy that an object possesses when it is in motion and is dependent on both its mass and velocity. Therefore, "kinetic energy" is the appropriate term to describe the energy of motion. The term "kindred energy" does not accurately represent the concept of energy of motion. "Potential energy" refers to the energy possessed by an object due to its position or state, not its motion. "Positive energy" is a general term and does not specifically refer to the energy of motion.

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• 5.

### Another word for energy of position is ______________.

• A.

Kinetic energy

• B.

Kindred energy

• C.

Potential energy

• D.

Positive energy

C. Potential energy
Explanation
Potential energy is the correct answer because it refers to the energy that an object possesses due to its position or condition. It is the energy that is stored and can be converted into other forms of energy, such as kinetic energy, when the object's position or condition changes.

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• 6.

### Kinetic energy is what a ball has while it is __________________.

• A.

At rest

• B.

In motion

B. In motion
Explanation
Kinetic energy is the energy possessed by an object due to its motion. When a ball is "in motion," it means that it is moving, and therefore it has kinetic energy. Kinetic energy is dependent on the mass and velocity of the object.

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• 7.

### True or False. Kindred energy is what a ball has while it is in motion.

• A.

True

• B.

False

B. False
Explanation
The statement is false because kindred energy is not a term used to describe the energy of a ball in motion. Kinetic energy is the correct term used to describe the energy possessed by an object in motion.

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• 8.

### Potential energy is the possibility of _____________.

• A.

Resisting release

• B.

Controlling the universe

• C.

Resisting gravity

• D.

Becoming liquid

• E.

Motion

E. Motion
Explanation
Potential energy is the possibility of motion. Potential energy refers to the stored energy an object possesses due to its position or state. This energy can be released and converted into kinetic energy, which is the energy of motion. Therefore, potential energy represents the potential or possibility for an object to be in motion.

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• 9.

### True or False.  An object can have kinetic energy and potential energy at the same time.

• A.

True

• B.

False

A. True
Explanation
An object can have both kinetic energy and potential energy at the same time. Kinetic energy is the energy possessed by an object due to its motion, while potential energy is the energy possessed by an object due to its position or configuration. For example, a ball thrown into the air has both kinetic energy while it is moving and potential energy when it is at a certain height above the ground. Therefore, it is possible for an object to have both forms of energy simultaneously.

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• 10.

### True or False.  An object can have kindred energy and positive energy at the same time.

• A.

True

• B.

False

B. False
Explanation
An object cannot have kindred energy and positive energy at the same time because kindred energy refers to the potential energy stored in an object due to its position or composition, while positive energy refers to the energy associated with the motion or activity of an object. These two types of energy are distinct and cannot coexist in the same object simultaneously. Therefore, the statement is false.

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• 11.

### Newton's First Law:  An object at rest tends to _________________ acted upon by ____________.  An object in motion tends to remain in motion unless acted upon by an outside force.

• A.

Begin motion until / a very strong gratitational pull

• B.

Stay at rest until / a very strong mass

• C.

Begin motion until / kinetic energy

• D.

Stay at rest until / an outside force

D. Stay at rest until / an outside force
Explanation
According to Newton's First Law, an object at rest tends to stay at rest until acted upon by an outside force. This means that if there are no external forces acting on an object, it will remain at rest. The statement "stay at rest until / an outside force" accurately describes this law.

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• 12.

### True or False.  Newton's Second Law:  A force is equal to the mass of the object times the acceleration of the force.

• A.

True

• B.

False

A. True
Explanation
Newton's Second Law states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. This law is represented by the equation F = ma, where F is the force, m is the mass, and a is the acceleration. Therefore, the statement "A force is equal to the mass of the object times the acceleration of the force" is true, as it accurately reflects Newton's Second Law.

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• 13.

### True or False.  Gravity is a force.

• A.

True

• B.

False

A. True
Explanation
Gravity is a force that exists between any two objects with mass. It is responsible for the attraction between objects and is what keeps objects grounded on the Earth. This force is what causes objects to fall towards the ground and is essential for the functioning of many natural phenomena, such as the orbit of planets around the sun. Therefore, the statement that gravity is a force is true.

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• 14.

### The direction of the force called ____________ is opposite the direction of motion of the object.

• A.

Non-fiction

• B.

Non-friction

• C.

Fiction

• D.

Friction

• E.

None of the above

D. Friction
Explanation
Friction is the force that opposes the motion of an object. When an object is moving, friction acts in the opposite direction to the motion. This force arises due to the interaction between the surfaces of two objects in contact. Friction is present in various forms, such as static friction, kinetic friction, and rolling friction, and it plays a crucial role in everyday life, affecting the movement of vehicles, the grip between shoes and the ground, and many other physical phenomena.

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• 15.

### Luke played kickball all afternoon.  Has he done work?

• A.

Yes

• B.

No

A. Yes
Explanation
Luke playing kickball all afternoon can be considered as work, depending on the context. If Luke was playing kickball as part of a team or in a competitive setting, it can be seen as a form of physical activity or sport, which can be considered as work in terms of physical exertion and effort. However, if Luke was simply playing kickball for leisure or recreation, it may not be considered as work in the traditional sense. Therefore, the answer "Yes" is subjective and depends on the interpretation of what constitutes work.

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• 16.

### Katja practiced her guitar for over an hour.  Has she done work?

• A.

Yes

• B.

No

A. Yes
Explanation
Katja practicing her guitar for over an hour can be considered as work because she is actively engaging in an activity that requires effort, focus, and skill. Practicing an instrument requires concentration, coordination, and the development of muscle memory, all of which contribute to the improvement of her guitar-playing abilities. Therefore, her guitar practice can be seen as a productive and purposeful activity, indicating that she has indeed done work.

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• 17.

### Gabriella is tired.  She has been solving math problems in her head.  Has work been done?

• A.

Yes

• B.

No

B. No
Explanation
The question asks if work has been done, and the answer is "No". Work, in the context of physics, is defined as the transfer of energy to an object by the application of a force over a displacement. In this scenario, Gabriella being tired and solving math problems in her head does not involve any physical force or displacement, so no work is being done.

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• 18.

### Annika is sweeping the kitchen floor.  Is work being done?

• A.

Yes

• B.

No

A. Yes
Explanation
Yes, work is being done because Annika is actively sweeping the kitchen floor.

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• 19.

### Sebastion is very tired.  He has been pushing a wall.  It has not moved.  Has work been done?

• A.

Yes

• B.

No

B. No
Explanation
The answer is "No" because work is defined as the transfer of energy to an object to cause it to move. In this scenario, Sebastion has been pushing a wall, but it has not moved, indicating that no work has been done.

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• 20.

### Categorize the following objects: plastic wrap, a window, cardboard, paper towel

• A.

Opaque, translucent, transparent, opaque

• B.

Translucent, opaque, opaque, transparent

• C.

Transparent, transparent, opaque, translucent

• D.

Translucent, translucent, opaque, transparent

• E.

Opaque, transparent, translucent, translucent

C. Transparent, transparent, opaque, translucent
Explanation
The objects plastic wrap and a window are both transparent, meaning that light can pass through them easily. Cardboard is opaque, meaning that light cannot pass through it at all. Paper towel is translucent, meaning that light can pass through it, but it is not completely clear.

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• 21.

### Categorize the following objects: waxed paper, tin foil, wood, clear glass

• A.

Opaque, translucent, transparent, opaque

• B.

Translucent, opaque, opaque, transparent

• C.

Transparent, transparent, opaque, translucent

• D.

Translucent, translucent, opaque, transparent

• E.

Opaque, transparent, translucent, translucent

B. Translucent, opaque, opaque, transparent
Explanation
The correct answer categorizes the objects as follows: waxed paper is translucent, tin foil and wood are opaque, and clear glass is transparent.

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• 22.

### Light waves travel in straight lines called ______________.

• A.

Optical nerves

• B.

Rays

• C.

Reflections

• D.

Wavelengths

B. Rays
Explanation
Light waves travel in straight lines called rays. Rays are a term used in optics to describe the path that light takes when it travels from one point to another. They are used to represent the direction and propagation of light. This term is commonly used in the study of reflection, refraction, and the behavior of light in different mediums.

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• 23.

### The turning or bending of a light wave is called _________________.

• A.

Reflection

• B.

Ressurection

• C.

Reaction

• D.

Refraction

• E.

Refriction

D. Refraction
Explanation
Refraction is the correct answer because it refers to the bending or changing direction of a light wave as it passes from one medium to another. This phenomenon occurs due to the change in speed of light as it travels through different mediums, causing the light wave to change direction.

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• 24.

### True or False.  Refraction is the turning or bending of a light wave.

• A.

True

• B.

False

A. True
Explanation
Refraction refers to the phenomenon where light waves change direction as they pass from one medium to another. This change in direction is caused by the difference in the speed of light in the two mediums. As a result, the light wave appears to bend or turn at the interface between the two mediums. Therefore, the statement "Refraction is the turning or bending of a light wave" is true.

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• 25.

### A convex lense bends light rays __________ the light ray.

• A.

Through a prism of

• B.

Away from the focal point of

• C.

Outwards away from

• D.

In towards the center of

D. In towards the center of
Explanation
A convex lens is thicker in the middle and thinner at the edges. When light passes through a convex lens, it is refracted (bent) towards the center of the lens. This means that the light rays converge and come together at a point called the focal point. Therefore, the correct answer is "in towards the center of".

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• 26.

### True or False.  A concave lense bends light rays outward

• A.

True

• B.

False

A. True
Explanation
A concave lens is thinner at the center and thicker at the edges. When light passes through a concave lens, it diverges or spreads out. This means that the light rays bend away from each other and appear to come from a point behind the lens. As a result, the concave lens bends light rays outward, making the statement "True" correct.

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• 27.
• A.

Convex lens

• B.

Concave lens

• C.

Spectrum lens

• D.

Transparent lens

B. Concave lens
• 28.
• A.

Spectrum lens

• B.

Transparent lens

• C.

Concave lens

• D.

Convex lens

D. Convex lens
• 29.

### A ______________________ is the point in space where the light rays going through the lens all come together.

• A.

Prism

• B.

Focal point

• C.

Spectrum

• D.

Convection

• E.

Refractor

B. Focal point
Explanation
The correct answer is "focal point". A focal point is the point in space where the light rays going through the lens all come together. It is a result of the lens's ability to refract or bend light, causing the light rays to converge at a specific point. This convergence is important in focusing the light and creating clear images in optical systems such as cameras and telescopes.

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• 30.

### A _____________ spreads out sunlight until one can see the different wavelengths of light separately.

• A.

Telescope

• B.

Convex lens

• C.

Prism

• D.

Reflection

• E.

Refraction

C. Prism
Explanation
A prism spreads out sunlight until one can see the different wavelengths of light separately. This is because when light passes through a prism, it undergoes refraction, causing the different wavelengths of light to bend at different angles. This bending or dispersion of light allows us to see the different colors of the spectrum, such as red, orange, yellow, green, blue, indigo, and violet, separately.

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• 31.

### Light is reflected and absorbed by an object.  The reflected light is the color we observe that the object is, while the rest of the spectrum is absorbed.  If a car is blue, which statement below is correct?

• A.

Red is reflected, blue is absorbed

• B.

Blue is absorbed, green is reflected

• C.

Orange is reflected, blue is reflected, indigo is absorbed

• D.

Blue is reflected, all the other colors are absorbed

• E.

All the colors are reflected except blue which is absorbed

D. Blue is reflected, all the other colors are absorbed
Explanation
When light falls on an object, it is reflected and absorbed by the object. The color we observe is the color of light that is reflected, while the rest of the spectrum is absorbed. In this case, since the car is blue, it means that blue light is being reflected by the car, while all the other colors of light are being absorbed. Therefore, the correct statement is "blue is reflected, all the other colors are absorbed."

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• 32.

### Thermodynamics is the study of _____________________________.

• A.

Energy and what energy does

• B.

Heat and what heat does

• C.

Light and what it does

• D.

Water and what it does

B. Heat and what heat does
Explanation
Thermodynamics is the study of heat and what heat does. It focuses on understanding the transfer and transformation of energy in the form of heat, as well as its effects on matter and physical systems. This field of study encompasses concepts such as temperature, pressure, energy conversion, and the laws governing the behavior of heat. By studying thermodynamics, scientists and engineers can better understand and manipulate the behavior of heat in various systems, leading to advancements in energy production, efficiency, and technology.

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• 33.

### Entropy is increasing in the universe is ____________________________.

• A.

The First Law of Thermodynamics

• B.

The Second Law of Thermodynamics

• C.

An untrue statement

• D.

A nonsensical statement

B. The Second Law of Thermodynamics
Explanation
The Second Law of Thermodynamics states that in any natural process, the entropy (or disorder) of the universe always increases. This means that over time, systems tend to become more disordered and less organized. Therefore, the statement "Entropy is increasing in the universe" aligns with the Second Law of Thermodynamics, making it the correct answer.

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• 34.

### __________________ is the tendency of a state of order to become disordered.  This means if something has energy, it would tend to lose energy.

• A.

Kinetic theory

• B.

Industrial process

• C.

Thermodynamics

• D.

Entropy

D. Entropy
Explanation
Entropy is the measure of the disorder or randomness in a system. It is a fundamental concept in thermodynamics, which is the study of energy and its transformations. According to the second law of thermodynamics, entropy always increases in isolated systems, meaning that a state of order tends to become disordered over time. This is because there are more ways for the particles or energy to be spread out in a disordered state, leading to an increase in entropy. Therefore, the given explanation aligns with the concept of entropy as the tendency of a state of order to become disordered.

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• 35.

### We know from Kinetic Theory that all molecules are ________________.

• A.

At rest

• B.

In motion

• C.

Very small

• D.

Microscopic

B. In motion
Explanation
According to the Kinetic Theory, all molecules are in motion. This theory states that molecules are constantly moving and colliding with each other and their surroundings. Therefore, the correct answer is "in motion".

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• 36.

### According to Kinetic Theory, are the molecules in ice moving slowly, moving rapidly, or not moving at all?

• A.

Moving slowly

• B.

Moving rapidly

• C.

Not moving at all

A. Moving slowly
Explanation
According to the Kinetic Theory, the molecules in ice are moving slowly. This is because at low temperatures, such as those found in ice, the kinetic energy of the molecules is low, resulting in slower movement.

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• 37.

### According to Kinetic Theory, are the molecules in a star moving slowly, moving rapidly, or not moving at all?

• A.

Moving slowly

• B.

Moving rapidly

• C.

Not moving at all

B. Moving rapidly
Explanation
According to the Kinetic Theory, molecules in a star are moving rapidly. The Kinetic Theory states that all particles, including molecules, are constantly in motion. In the case of stars, the high temperatures and pressures cause the molecules to move at extremely high speeds. This rapid movement is essential for the various processes happening in stars, such as nuclear fusion, which requires high energy and collisions between particles. Therefore, the molecules in a star are not stationary or moving slowly, but rather moving rapidly.

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• 38.

### Convection is the transfer of ____________ through the motion of a substance past _______________.

• A.

Air / heat ducts

• B.

• C.

Heat / a thermostat

• D.

Heat / the heat source

D. Heat / the heat source
Explanation
Convection is the transfer of heat through the motion of a substance past the heat source. In this process, heat energy is transferred from a hotter region to a cooler region through the movement of the substance itself. This occurs because the heated substance becomes less dense and rises while the cooler substance becomes denser and sinks, creating a circulating flow that transfers heat. Therefore, the correct answer is "heat / the heat source."

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• 39.

### _________________ is the direct transfer of heat energy to another object in physical contact with the heat source.

• A.

Convection

• B.

Conduction

• C.

Convention

• D.

Condensation

B. Conduction
Explanation
Conduction is the direct transfer of heat energy to another object in physical contact with the heat source. It occurs through the collision of particles in a solid material, where the particles with higher energy transfer their energy to the particles with lower energy. This transfer of energy continues until thermal equilibrium is reached, resulting in the equal distribution of heat throughout the material.

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• 40.

### If a person's body temperature gets too low, a condition will set in called _____________.

• A.

Hypothermia

• B.

Hypnosis

• C.

Hyporeflection

• D.

Hypnoflexia

A. Hypothermia
Explanation
Hypothermia is a condition that occurs when a person's body temperature drops too low. This can happen due to exposure to cold temperatures, prolonged immersion in cold water, or certain medical conditions. Symptoms of hypothermia include shivering, confusion, slowed heart rate, and loss of consciousness. If not treated promptly, hypothermia can be life-threatening.

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• Mar 21, 2023
Quiz Edited by
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• Jan 28, 2010
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