Energy Transfer and Conservation GED and Hiset Test Prep

According to the law of conservation of energy, what is true about the amount of energy in the universe?

• It can be created and destroyed at will.

• It is always constant and cannot be created or destroyed.

• It is mutable and changes form frequently.

• It decreases over time due to entropy.

What is kinetic energy associated with?

• The internal energy of a system due to its temperature.

• The energy associated with motion.

• The energy that is transferred through heat.

• The energy that is stored in chemical bonds.

How is work defined in physics?

• The force applied to an object over a distance.

• The transfer of energy from a hot object to a cold one.

• The movement of molecules in a substance when heated.

• The vibrations of molecules at the end of a spoon touching hot water.

What is an example of kinetic energy transfer?

• A spoon in boiling water getting hot.

• A golf club swinging and hitting a stationary golf ball.

• Water boiling in a pot.

• Metal cooling down after being heated.

What does thermal energy represent in a material?

• The total kinetic energy of particles in an object.

• The measure of heat within a system.

• The potential energy between molecules in a substance.

• The sum of the kinetic and potential energy in an object due to its temperature.

Match the following methods of thermal energy transfer with the correct scenario.

• Heat transfer due to the movement of fluid

• Conduction

• Heat transfer through electromagnetic waves in a vacuum

• Convection

• Reducing heat transfer by using materials that do not conduct heat well

• Insulation

• Heat moving through a metal spoon placed in boiling water

• Radiation

(a)   are known as insulators because heat does not easily travel through them.

• Metals and glass
• Wood and plastic
• Water and air
• Rubber and ceramics

Convection only occurs in which states of matter?

• Solids and liquids

• Liquids and gases

• Solids and gases

• Solids only

What is the process that creates a current of molecules sinking, heating up, rising, cooling down, and sinking again?

• Conduction

• Radiation

• Convection

• Insulation

Match the following descriptions of heat transfer methods with the correct type.

• Describes conduction

• It involves the movement of fluids to transfer heat

• Describes convection

• It is the transfer of heat by electromagnetic waves

• Describes radiation

• It is the transfer of heat by direct contact