Unit 7 7th grade

What does mass measure?

• Amount of matter

• Amount of space

• Amount of weight

• an objects inertia

Which one is NOT an example of inertia?

• A hockey puck sliding across the ice

• a soccer ball sitting on a field

• tread on a bike tire

• satellite orbiting Earth

Why is a cart harder to push when you add more groceries to it?

• The wheels begin to rub more

• The cart starts breaking

• More mass has more inertia

• less friction

Which of the following is the best conductor of electricity?

• pastic

• glass

• copper

• wood

What particle flows in an electrical current?

• Electrons

• protons

• neutrons

• leptons

What causes shocks from rubbing feet on carpet as well as from lightning?

• Static electricity

• rolling friction

• periodic law

• electric field

On a string of lights, if one bulb is removed and they all go out, the circuit must be:

• parallel

• series

What does friction resist?

• Motion

• electricity

• mass

• walking

The circuit type in which one load shorts and the rest of the circuit still functions

• Series

• closed

• parallel

• open

A ball is released down a half pipe and allowed to roll. What statement best describes the ball's future motion?

• the ball will continue at the same speed

• the ball will speed up as it rolls

• the ball will continue to go up and down

• The ball will eventually come to a rest at the bottom