Science Trek: Force & Motion 16 Comprehension

What is a force?

• A type of energy

• A push or a pull

• A kind of motion

• A type of gravity

Who discovered the three laws of motion?

• Albert Einstein

• Isaac Newton

• Galileo Galilei

• Thomas Edison

What happens when forces are balanced?

• Everything moves fast

• Nothing happens

• Things fly away

• It makes sound

What is gravity?

• A force that makes things float

• A force of attraction between objects

• A type of movement

• A kind of energy

According to Newton's first law, what happens to an object not acted on by a force?

• It moves faster

• It stays still or moves in a straight line

• It changes direction

• It falls

What does friction do?

• Makes things move faster

• Slows things down

• Causes things to fly

• Creates energy

Why do astronauts float in space?

• There is no gravity

• They are very light

• They move fast enough to escape gravity

• They are in a special suit

What must happen for an object to change its motion?

• It needs to be pushed or pulled

• It must be very heavy

• It needs to be heated

• It should be in the air

What would happen to us if there was no gravity?

• We would float everywhere

• We couldn't exist

• Earth would be bigger

• We would be happier

How does a plane fly despite gravity?

• It has special wings that create lift

• It is very light

• It goes very slow

• It uses magic