Quiz about Science

Question 1

The diagram below shows a man using a lever to move a rock.

Which change can he make to the fulcrum to decrease the force he has to apply?

Accepted Answer

move the fulcrum closer to the rock

Answer

remove the fulcrum

Answer

put the fulcrum on top of the lever

Answer

move the fulcrum closer to himself

Question 2

Which statement best explains how inclined planes create mechanical advantage and affect efficiency?

Accepted Answer

Inclined planes reduce the amount of force necessary to move an object a specified height over a distance, increasing efficiency.

Answer

Inclined planes reduce the amount of force necessary to move an object a specified height over a distance, decreasing efficiency.

Answer

Inclined planes increase the amount of force necessary to move an object a specified height over a distance, increasing efficiency.

Answer

Inclined planes increase the amount of force necessary to move an object a specified height over a distance, decreasing efficiency.

Question 3

Adam had a string of lights. The whole string of lights stopped glowing when one of the lightbulbs burned out.

What caused this to happen?

Accepted Answer

The burned-out lightbulb opened the circuit.

Answer

The burned-out lightbulb closed the circuit.

Answer

The burned-out lightbulb drained the power source.

Answer

The burned-out lightbulb caused a surge in the power source.

Question 4

This is a diagram of four simple machines.

Which simple machine would most likely be used to move an object over great distances and on a flat surface?

Accepted Answer

T

Answer

R

Answer

S

Answer

U

Question 5

Which of the following is used as a wedge?

Accepted Answer

a sewing needle

Answer

baseball bat

Answer

a bicycle handle

Answer

a faucet handle

Question 6

Which yard tool has a wheel and axle that helps move a pile of dirt?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 7

Which is the best example of a first-class lever?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 8

How does using a pulley to lift an object increase mechanical advantage?

Accepted Answer

by decreasing the amount of force needed to lift the object

Answer

by decreasing the mass of the object being lifted

Answer

by increasing the mass of the object being lifted

Answer

by increasing the amount of force needed to lift the object

Question 9

In which part of an electric circuit does energy originate?

Accepted Answer

battery

Answer

bulb

Answer

switch

Answer

wire

Question 10

Which circuit is most likely able to conduct electricity?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 11

How is work done on an object?

Accepted Answer

The object is pushed and moves a certain distance.

Answer

The object is not pushed and remains stationary.

Answer

The object is not pushed and moves a certain distance.

Answer

The object is pushed and remains stationary.

Question 12

The diagram below shows a boy with his positions above the trampoline.

Which best describes the energy the boy has at position 3 just before gravity begins to pull him back down?

Accepted Answer

potential

Answer

applied

Answer

kinetic

Answer

mechanical

Question 13

The illustration below shows an athlete pole vaulting more than 6 meters into the air.

At which point is the gravitational potential energy converted to kinetic energy?

Accepted Answer

when the athlete begins to fall

Answer

when the athlete is running to begin vault

Answer

when the athlete begins to go upwards

Answer

when the athlete hits the mat

Question 14

The diagram below shows a person swinging a hammer.

Which position has the least amount of kinetic energy?

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 15

The table below shows the mass and height of several objects on bookshelves. Which object has the greatest potential energy?

Accepted Answer

object Q

Answer

object P

Answer

object R

Answer

object S

Question 16

This diagram shows the motion of a falling ball.

Accepted Answer

kinetic

Answer

mechanical

Answer

potential

Answer

thermal

Question 17

A 20-kg ball and a 50-kg ball rest at the top of a ramp. Which statement best describes the potential energy of the balls?

Accepted Answer

The 50-kg ball has the greater potential energy because it has the greater mass.

Answer

The 20-kg ball has the greater potential energy because it has less inertia.

Answer

They have the same potential energy because their positions are the same.

Answer

They have the same potential energy because gravity has the same effect on each one.

Question 18

The diagram below shows the motion of a ball while being dropped. What happens to the energy of the ball from when t = 0 s to when t = 5 s?

Accepted Answer

Potential energy decreases and kinetic energy increases, but the total amount of mechanical energy remains the same.

Answer

Potential energy increases and kinetic energy decreases, but the total amount of mechanical energy remains the same.

Answer

Potential energy and kinetic energy both increase, and the total amount of mechanical energy

Answer

Potential energy and kinetic energy both decrease, and the total amount of mechanical energy decreases.

Question 19

Which will cause an increase in the mechanical energy of an object?

Accepted Answer

increasing its potential energy

Answer

decreasing its kinetic energy

Answer

increasing its electrical energy

Answer

decreasing its gravitational energy

Question 20

The diagram below shows the path of an object. The object is placed on point S and released toward point X. At which point will the object have the same amount of potential energy as it does when it is at point S?

Accepted Answer

X

Answer

T

Answer

U

Answer

V

Question 21

The diagram below shows the path of a marble. At which position does the marble have the most kinetic energy?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 22

A person enters a room, flips the light switch, and a lamp turns on. What causes the lamp to turn on?

Accepted Answer

The circuit is open, and flipping the switch closes the circuit.

Answer

The circuit is closed, and flipping the switch opens the circuit.

Answer

The wires are connected, and flipping the switch disconnects the wires.

Answer

The wires are connected, and flipping the switch disconnects the lamp.

Question 23

This is a diagram of four simple machines. Which simple machine would most likely be used to move an object over great distances and on a flat surface?

Accepted Answer

T

Answer

R

Answer

S

Answer

U

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