Question 1

What is force?

Accepted Answer

A push or pull

Answer

A type of energy

Answer

A type of sound

Answer

A type of matter

Question 2

What is the SI unit of force?

Accepted Answer

Newtons

Answer

Seconds

Answer

Kilograms

Answer

Meters

Question 3

What is the force that opposes motion called?

Accepted Answer

Friction

Answer

Velocity

Answer

Gravity

Answer

Inertia

Question 4

What two factors affect the amount of friction between two surfaces?

Accepted Answer

Surface type and force pushing the surfaces together

Answer

Size and weight

Answer

Color and texture

Answer

Temperature and moisture

Question 5

Which of the following surfaces has the most friction?

Accepted Answer

Rough

Answer

Wet

Answer

Dirty

Answer

Smooth

Question 6

What happens to the amount of friction when the force pushing two surfaces together increases?

Accepted Answer

Friction increases

Answer

Friction decreases

Answer

Friction becomes zero

Answer

Friction stays the same

Question 7

What happens to the amount of friction when the surface types rubbing against each other change?

Accepted Answer

Friction changes

Answer

Friction stays the same

Answer

Friction becomes zero

Answer

Friction increases

Question 8

Which of the following is an example of sliding friction?

Accepted Answer

Ice skates gliding on ice

Answer

A person walking on a carpet

Answer

A car driving on a road

Answer

A ball rolling on the ground

Question 9

What type of friction slows down an object moving through a fluid?

Accepted Answer

Fluid friction

Answer

Dynamic friction

Answer

Rolling friction

Answer

Static friction

Question 10

Which of the following can be used to reduce friction?

Accepted Answer

Lubricants

Answer

Velcro

Answer

Cement

Answer

Sandpaper

Question 11

What is the most common form of energy that we use?

Accepted Answer

Electricity

Answer

Gasoline

Answer

Sunshine

Answer

Water

Question 12

What is kinetic energy?

Accepted Answer

Energy of motion

Answer

Heat energy

Answer

Light energy

Answer

Energy stored in an object

Question 13

What is potential energy?

Accepted Answer

Stored energy

Answer

Energy of motion

Answer

Heat energy

Answer

Light energy

Question 14

What is the energy that comes from the sun?

Accepted Answer

Solar energy

Answer

Wind energy

Answer

Nuclear energy

Answer

Geothermal energy

Question 15

What is geothermal energy?

Accepted Answer

Heat from the Earth's interior

Answer

Energy from waterfalls

Answer

Energy from the wind

Answer

Energy from the sun

Question 16

What type of energy is produced by burning fossil fuels?

Accepted Answer

Heat energy

Answer

Wind energy

Answer

Light energy

Answer

Geothermal energy

Question 17

What is hydroelectric energy?

Accepted Answer

Energy from waterfalls

Answer

Energy from the Earth's interior

Answer

Energy from the wind

Answer

Energy from the sun

Question 18

What is nuclear energy?

Accepted Answer

Energy from splitting atoms

Answer

Energy from fossil fuels

Answer

Energy from the sun

Answer

Energy from waterfalls

Question 19

What is biomass energy?

Accepted Answer

Energy from organic matter

Answer

Energy from wind

Answer

Energy from waterfalls

Answer

Energy from the sun

Question 20

What is gravity?

Accepted Answer

A force that pulls objects towards each other

Answer

An imaginary force that only exists in movies

Answer

Something that pushes objects away from each other

Answer

A type of energy that objects emit

Question 21

What is the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force of gravity acting on an object's mass

Answer

Mass and weight are the same thing

Answer

Mass is the force of gravity acting on an object's weight, while weight is the amount of matter in an object

Answer

Mass is the weight of an object on the moon, while weight is the weight of an object on earth

Question 22

Why do astronauts float in space?

Accepted Answer

Because there is no gravity in space

Answer

Because they are moving too fast

Answer

Because they are weightless

Answer

Because they are wearing special suits

Question 23

What is the name of the first person to discover gravity?

Accepted Answer

Isaac Newton

Answer

Galileo Galilei

Answer

Charles Darwin

Answer

Albert Einstein

Question 24

What is the law of conservation of energy?

Accepted Answer

Energy cannot be created or destroyed, only transformed from one form to another

Answer

Energy can be destroyed, but not created

Answer

Energy can be created, but not destroyed

Answer

Energy can be created and destroyed at will

Question 25

What type of energy transformation occurs in a wind turbine?

Accepted Answer

Mechanical energy to electrical energy

Answer

Thermal energy to kinetic energy

Answer

Electrical energy to mechanical energy

Answer

Chemical energy to electrical energy

Question 26

What type of energy transformation occurs in a flashlight?

Accepted Answer

Chemical energy to electrical energy to light energy

Answer

Mechanical energy to electrical energy to light energy

Answer

Thermal energy to kinetic energy to light energy

Answer

Electrical energy to mechanical energy to light energy

Question 27

What type of energy transformation occurs in a battery-operated toy car?

Accepted Answer

Chemical energy to electrical energy to mechanical energy

Answer

Thermal energy to kinetic energy to electrical energy

Answer

Electrical energy to mechanical energy to chemical energy

Answer

Mechanical energy to electrical energy to chemical energy

Question 28

What is a simple machine?

Accepted Answer

A device that makes work easier.

Answer

A machine used only in factories.

Answer

A machine that can perform complex tasks.

Answer

A machine with more than one moving part.

Question 29

What is the fulcrum of a lever?

Accepted Answer

The point on which it pivots.

Answer

The heaviest part of the lever.

Answer

The part of the lever that moves the most.

Answer

The part of the lever that is held by a person.

Question 30

What is the advantage of using a pulley?

Accepted Answer

It makes it easier to lift heavy objects.

Answer

It increases the speed of the object being moved.

Answer

It reduces the amount of force needed to move an object.

Answer

It makes it easier to move objects horizontally.

Question 31

What is an inclined plane?

Accepted Answer

A flat surface that is at an angle.

Answer

A machine used to cut through materials.

Answer

A machine used to move objects horizontally.

Answer

A machine used to lift heavy objects.

Question 32

What is the advantage of using a screw?

Accepted Answer

It can hold objects together tightly.

Answer

It can move objects quickly.

Answer

It can lift heavy objects easily.

Answer

It can split materials into smaller pieces.

Question 33

What is the difference between a wheel and axle and a gear?

Accepted Answer

A gear has teeth while a wheel and axle do not.

Answer

A gear is used for cutting while a wheel and axle are not.

Answer

A wheel and axle can only move objects in a straight line.

Answer

A wheel and axle can lift heavy objects while a gear cannot.

Question 34

What is the advantage of using a wedge?

Accepted Answer

It can split objects apart.

Answer

It can hold objects together tightly.

Answer

It can move objects quickly.

Answer

It can lift heavy objects easily.

Question 35

What is the difference between a fixed pulley and a movable pulley?

Accepted Answer

A fixed pulley is attached to a fixed object while a movable pulley moves with the object being lifted.

Answer

A fixed pulley requires more force to lift an object than a movable pulley.

Answer

A fixed pulley can only lift lighter objects while a movable pulley can lift heavier objects.

Answer

A fixed pulley can move objects horizontally while a movable pulley cannot.

Question 36

What is the advantage of using a lever?

Accepted Answer

It can magnify force.

Answer

It can move objects quickly.

Answer

It can hold objects together tightly.

Answer

It can lift objects easily.

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