Energy is best described as

the ability to do work or cause change

forces being applied to result in no movement

change in position relative to another object

The picture to the right shows a man with a lit match. Which of the following best shows the sequence of energy transformations taking place?

chemical → electrical → heat

14) The mass of the Alka-Seltzer, water, and vial was measured before and after the reaction and found to be 98.3g both times. Why were the masses equal before and after the reaction?

Because the law of conservation of mass states that mass is neither created nor destroyed in a closed system.

Because the reaction produced more mass than it started with.

Because the mass of the gas produced was lost to the surroundings.

Because the scale was not accurate.

After a student mixed 10g of baking soda with 100mL of vinegar and the reaction stopped, the temperature in the flask went down. What does this indicate about the energy change in the reaction?

Energy was absorbed during the reaction.

Energy was released during the reaction.

No energy change occurred during the reaction.

The temperature drop was unrelated to the reaction.

Temperature is the measure of: (1pt)

The average kinetic energy of molecules

The average potential energy of molecules

The average potential and kinetic energy of molecules

The average amount of heat in a substance

Beaker B has more thermal energy because:

it contains more water or is at a higher temperature.

it is made of a different material.

it is placed in a colder environment.

Washers were heated to the same temperature and then placed into 4 different containers of water. Calculate the ΔT for each container of water below. Use the formula: Change in temperature = Final (T2) Temp - Initial (T1) Temp. (Show all your work in each box for each calculation.) Set 1: 2 Washers (Mass: 20g, T1: 24°C, T2: 26°C) Set 2: 8 Washers (Mass: 80g, T1: 24°C, T2: 38°C)

ΔT for Set 1: 2°C ΔT for Set 2: 14°C

ΔT for Set 1: 12°C ΔT for Set 2: 24°C

ΔT for Set 1: 4°C ΔT for Set 2: 8°C

ΔT for Set 1: 1°C ΔT for Set 2: 10°C

The mass of the washers affects the change in temperature (ΔT) of the water they are placed in by:

Increasing the mass of the washers increases the change in temperature (ΔT) of the water.

Increasing the mass of the washers decreases the change in temperature (ΔT) of the water.

The mass of the washers has no effect on the change in temperature (ΔT) of the water.

Decreasing the mass of the washers increases the change in temperature (ΔT) of the water.

Which process is most responsible for the temperature changes that will take place?

conduction of heat through the aluminum bar

radiation of heat from the water in the cups to the thermometers

radiation of heat from the water in the cups into the air

conduction of heat through the air to the water in the cups

As the metal ball is being heated, what is occurring to the molecules within it?

The molecules move faster and spread apart.

The molecules stop moving completely.

The molecules shrink and come closer together.

The molecules change into a different element.

Which claim is supported by the data in the table?

Analog signals are more distorted than digital signals

Noise does not affect digital signals

Information cannot be carried by analog signals

Digital signals are easier to transmit than analog signals

Which of the following statements accurately describes why analog and digital waves are visually represented in this way?

A. Analog waves are continuous while digital waves are not

B. Digital waves are continuous while analog waves are not

C. Both analog and digital waves are continuous

D. Both analog and digital waves are not continuous

What is the amplitude of Wave 1?

Amplitude of Wave 1: 4 mm; Amplitude of Wave 2: 2 mm

Amplitude of Wave 1: 2 mm; Amplitude of Wave 2: 4 mm

Amplitude of Wave 1: 3 mm; Amplitude of Wave 2: 2 mm

Amplitude of Wave 1: 5 mm; Amplitude of Wave 2: 2 mm

Which statement best describes the sound waves in the diagram above?

Wave 1 has twice the energy of wave 2

Wave 1 has the same the energy of wave 2

Wave 1 has one-half the energy of wave 2

Wave 1 has four times the energy as wave 2

Which of the following explains why the dishes need to be heavy?

heavier objects have more inertia, so they are more likely to remain in the same position

lighter objects have more inertia, so they are more likely to remain in the same position

heavier objects can only be moved by objects that are heavier

lighter objects have less inertia, so they are more likely to remain in the same position

Calculate the force needed to move an object using the formula $$F=MA$$ . The mass of the object is 25.2 grams and its acceleration is 4.0 m/s 2 . Round to the nearest tenth place and include units.

0.1 N (rounded to nearest tenth)

1.0 N (rounded to nearest tenth)

0.4 N (rounded to nearest tenth)

2.5 N (rounded to nearest tenth)

What is the net force being applied in the motion of the block shown below?

0 N (The forces are equal and opposite, so the net force is zero.)

5 N (The block is accelerating to the right.)

10 N (There is an unbalanced force to the left.)

15 N (The forces are not balanced, so the net force is 15 N.)

According to the data table, which type of ball (baseball or softball) is more likely to be hit for a home run?

Baseball (because the distance traveled by baseballs is generally greater and exceeds 175m more often than softballs)

Softball (because the distance traveled by softballs is generally greater and exceeds 175m more often than baseballs)

Both are equally likely to be hit for a home run

Neither baseball nor softball can be hit for a home run

Which player applied the greatest force to the ball, and what was the result in terms of distance traveled?

Player 4 (Baseball) applied the greatest force (36,000 N), and the ball traveled 175 m.

Player 2 (Soccer) applied the greatest force (8,000 N), and the ball traveled 50 m.

Player 1 (Golf) applied the greatest force (5,000 N), and the ball traveled 300 m.

Player 3 (Tennis) applied the greatest force (2,000 N), and the ball traveled 80 m.

The motion of an object is determined by

The forces acting on the object

The amount of heat in the object

The amount of potential energy the object has

The direction the object is facing

Assuming applied force is constant, what will happen to the acceleration of an object if its mass increases?

The acceleration will decrease.

The acceleration will remain the same.

The acceleration will increase.

It is impossible to tell how this change in mass will affect acceleration.

What two forces are acting on the baseball to the right?

Gravity and Air Resistance (drag)

Tension and Air Resistance (drag)

Two ways a student could increase the magnetic force of a simple electromagnet made with a battery, wire, and nail to lift more paper clips are:

Increase the number of wire coils and use a stronger battery.

Decrease the number of wire coils and use a weaker battery.

Use a plastic nail and thinner wire.

Reduce the length of the wire and use fewer paper clips.

Which of the following factors would impact the strength of the magnetic forces between a magnet and an object attracted to it?

all of the answer choices are correct

the size of the magnet and the object

the distance between the magnet and the object

the material that the magnet is made up of

What can the students conclude from this experiment?

Magnet 2 and Magnet 4 are the strongest because they pick up tacks from a greater distance

Magnet 1 and Magnet 3 are the strongest because they hang closest to the tacks

Magnet 2 and Magnet 3 are the strongest because they can reach more tacks in the middle

Magnet 3 and Magnet 4 are the strongest because they pick up the most tacks

In which of these circuits will the other light bulbs still light even if one bulb is burned out?

C. (Image of a parallel circuit)

D. (Image of a parallel circuit)

During its exploration on Mars, the Mars Rover encounters a rock and collides with it. How does Newton's third law explain the interaction between the Mars Rover and the rock?

The Mars Rover and the rock both exert equal forces on each other in opposite directions.

They both exert forces on each other in the opposite direction, but the rover exerts a greater force than the rock.

They both exert forces on each other in the same direction, but the rock exerts a greater force than the rover.

They both exert forces on each other in the opposite direction, but the rock exerts a greater force than the rover.

Energy and Heat Worksheet

Authored by D. Knecht

Science

8th Grade

NGSS covered

Used 22+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement correctly describes the relationship between energy and the way an object moves?

An object has the most energy when it is not moving.

The faster the speed of the object, the more energy it has.

The slower the speed of the object, the more energy it has.

An object has the most energy when it is moving back and forth.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the likely mass of a cannonball that has a speed of 100 m/s and has 50,000 J of kinetic energy?

20 lbs

30 lbs

10 lbs

5 lbs

Tags

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The “Kinetic Energy” of an object relates best to that object’s ____________

Shape

Color

Speed

Direction

Tags

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the speed of a cannon ball that travels 500 km in 30 seconds. The formula has been provided to the right. Show all work, round your answer to the nearest tenth (0.1) and use correct units.

Speed = 500 km / 30 s = 16.7 km/s

Speed = 500 km / 30 s = 1.7 km/s

Speed = 500 km / 30 s = 0.06 km/s

Speed = 500 km / 30 s = 150 km/s

Tags

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a cannonball is fired, there is a loud noise when it leaves the cannon. The graphs below show the sound waves of 2 different cannonballs A and B that were fired. Note that an oscilloscope was used to convert a longitudinal sound wave into a transverse wave. Pirate Pete notices that cannonball B was louder than cannonball A. What is the best evidence from the graph that supports his claim?

The amplitude of cannonball B is higher than the amplitude of cannonball A.

The amplitude of cannonball B is lower than the amplitude of cannonball A.

The wavelength of cannon ball A is shorter than then the wavelength of cannonball B.

The wavelength of cannon ball A is longer than the wavelength of cannonball B.

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best evaluates the student’s claim?

The claim is incorrect because the potential energy increases when the speed of the ball increases.

The claim is incorrect because the potential energy of the ball is being transferred to kinetic energy as it travels down the ramp.

The claim is correct because the speed of the ball increases, causing the ball to remain in motion as it travels down the ramp.

The claim is correct because the speed of the ball is the same as its kinetic energy, and the speed of the ball increases as it travels down the ramp.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best explains whether the student’s statement is correct or incorrect?

The statement is correct because the gravitational force acting on the objects with different masses is the same.

The statement is incorrect because an object with more mass has more potential energy.

The statement is incorrect because more force is needed to lift an object with more mass to the same height as an object with less mass.

The statement is correct because the potential energy of any object with mass is based on an object’s height above the ground and the speed at which it travels.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

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Energy and Heat Worksheet

Which statement correctly describes the relationship between energy and the way an object moves?

What is the likely mass of a cannonball that has a speed of 100 m/s and has 50,000 J of kinetic energy?

The “Kinetic Energy” of an object relates best to that object’s ____________

Calculate the speed of a cannon ball that travels 500 km in 30 seconds. The formula has been provided to the right. Show all work, round your answer to the nearest tenth (0.1) and use correct units.

Which statement best evaluates the student’s claim?

Which statement best explains whether the student’s statement is correct or incorrect?

A student releases a ball from a height of 100cm above the ground. The diagram below shows the ball’s position at five different times from its starting point to its maximum height after the first bounce. What is the estimated bounce height of the ball at position 5?

Energy is best described as

The picture to the right shows a man with a lit match. Which of the following best shows the sequence of energy transformations taking place?

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