5.15: Unit Test Physical Science (Unit 5 Test: Energy)

Which statement about temperature is correct? Temperature is the same thing as heat. Temperature is the same thing as energy. Temperature is an indirect measurement of the heat energy in a substance.

Temperature is an indirect measurement of the heat energy in a substance.

In the "Design a Thermos" lab, the temperature of the thermos was compared with a container that was not insulated. What was the purpose of that container?

That container was a control—a basis for comparison.

What happens when ice *melts,* according to the kinetic theory? The water molecules increase their speed. The water molecules do not change speed. The water molecules decrease their speed.

The water molecules increase their speed.

Which type of energy does a *swinging* pendulum demonstrate? only kinetic energy both potential and kinetic energy chemical energy only potential energy

both potential and kinetic energy

What does a *ball falling* through the air have? both kinetic energy because it still has a distance to move before it hits the ground and potential energy because it is moving only kinetic energy both potential energy because it still has a distance to move before it hits the ground and kinetic energy because it is moving only potential energy

both potential energy because it still has a distance to move before it hits the ground and kinetic energy because it is moving

How do liquids and gases transfer heat? by conduction by convection by air movement by radiation

by convection

How can the period of a pendulum be increased? by taking away mass by adding mass by making the string longer by making the string shorter

by making the string longer

Which type of energy is stored in chemical *compounds* and released in chemical reactions? potential energy electrical energy kinetic energy chemical energy

chemical energy

Which type of energy is the energy of *motion?* static stored potential kinetic

kinetic

What collides and creates a movement of heat called conduction? photons ~ *Nope From Light energy* compounds atoms molecules

molecules

What was done in the "Heat Transfer" lab after placing blocks of ice on different materials?

observing melting times to see which materials made good insulators

When a car stops, the brakes heat up because of friction. What is this an example of? energy being destroyed elastic motion periodic motion *one form of energy being converted to another*

one form of energy being converted to another

Which type of energy is *stored* energy? chemical mechanical potential kinetic

potential

Which type of energy is water *held* back by a dam? potential energy kinetic energy chemical energy mechanical energy

potential energy

What can avoid traveling through a solid, a liquid, or a gas? conduction *radiation ~ Radiation can travel through empty spaces* convection

radiation

What is the correct definition of *energy?* the ability to do work force force × distance chemical change

the ability to do work

What happens to the force needed to stretch an elastic object? *It increases to stretch it farther.* It remains the same as it is stretched. It decreases to stretch it farther.

It increases to stretch it farther.

What does a thermos do? A thermos stops heat transfer. A thermos slows heat transfer. *~ Thermos maintains its temperature longer* A thermos makes things cooler.

A thermos slows heat transfer.

Why would aluminum foil be useful in a thermos design? *Aluminum foil reflects radiant heat.* Aluminum foil is a good insulator. Aluminum foil is a good conductor.

Aluminum foil reflects radiant heat.