Unit 3 Science

Which object needs the most force to move?

• penny

• textbook

• apple

• football

Which object needs the least force to move?

• penny

• textbook

• apple

• football

All of the following objects produce sound energy EXCEPT -

• radio

• drum

• flashlight

• TV

The picture shows the kind of pencil sharpener found in many

classrooms. Turning the handle of the pencil sharpener to sharpen a

pencil is an example of using -

• light energy

• mechanical energy

• electrical energy

• thermal energy

What type of energy bounces off a mirror and allows you to see your

reflection?

• light energy

• mechanical energy

• electrical energy

• thermal energy

A push or a pull changes an object's -

• size

• motion

• weight

• temperature

All of the actions below would probably move a book EXCEPT -

• standing on top of the book

• pushing a book off the table

• pulling a rug the book is on

• kicking a book across the floor

A pull can be done to do all of the following EXCEPT -

• open a door

• move a wagon

• lift some rocks

• boil some water

A toaster oven uses all of the following types of energy EXCEPT -

• thermal energy

• light energy

• sound energy

• solar energy

Two boys jumped on a trampoline.

The main reason why the boys came down after jumping up in the air is because

• magnetism is pulling the boys down

• the boys were pulled down by the wind

• gravity is pulling the boys down

• gravity is pushing the boys in the air