Unit 3 Science Test: Energy

You buy a television and plug it into an a wall outlet. Which form of energy allows you to turn on the television?

• Light energy

• Kinetic energy

• Potential energy

• Electrical energy

Forces can affect the rate of an object’s motion. Which of these is a force?

• Acceleration

• Gravity

• Speed

• Velocity

Which best describes friction?

• A unit in the metric system

• A unit that is a measure of force

• Energy in the form of pushing or pulling

• A force that opposes motion between two surfaces that are touching

Adrian rode his bike. He traveled 20 km. It took him 2 hrs. If Adrian rode at a constant speed how fast was he traveling?

• 3 km/hr

• 10 km/hr

• 20 km/hr

• 40 km/hr

Objects have potential energy because of their position. Which object has potential energy?

• A parked car idling

• A rocket on its way to space

• A spinning top on the floor

• A mango hanging from a branch

You run at a rate of 8 min/mil. How long would it take you to run 4 mi at this rate?

• 2 min

• 8 min

• 32 min

• 64 min

Mrs. Ball and Mrs. Heath put a spring on a dowel. Then they add a foam ball to the dowel. They push on the ball to squeeze the spring, and then they let the ball go. Which of the following forms of energy does the ball have during the investigation?

• Chemical energy

• Electrical energy

• Magnetic energy

• Mechanical energy

Velocity and speed are both measurements describing an object’s motion. What is a difference between velocity and speed?

• Speed depends on acceleration, but velocity does not.

• Speed does not depend on direction, but velocity does.

• Speed depends on velocity, but velocity does not depend on speed.

• Velocity depends only on friction, but speed depends only on gravity.

Which statement best describes no acceleration?

• Taylor rode faster as she biked down the hill.

• Taylor rode her bike at a steady pace on a flat road

• Taylor moved slowly as she climbed a hill on her bike

• Taylor slowed down to turn the corner and bike back home

Adrian is using toy cars to investigate speed. He is changing the length and shape of the track to see the effects on speed. What change could he make to the track to make a car go faster?

• make the end of the track higher than the beginning

• make the beginning of the track higher than the end

• make the car as heavy as possible

• make the track as rough as possible