8th Science Final Review Ch 5-9 1st draft

Which is an example of a chemical change?

• food rotting

• sugar dissolving

• broken glass

• boiling water

Thermal energy is the __________ of the particles in a material.

• total energy

• temperature

• potential energy

• average kinetic energy

To convert temperature from Celsius to Fahrenheit, use ºF = (ºC ×1.8) + 32

• True

• False

Which of the following objects has kinetic energy?

• a bicycle parked at the top of a hill

• leaves lying on the ground beneath a tree

• a ball rolling across the floor

• a sunny windowsill

A(n) __________ is a material that does not allow heat to move through it easily

• fluid

• current

• conductor

• insulator

Which is the transfer of energy by the motion of heated particles in a gas or liquid?

• conduction

• convection

• radiation

• collision

Which of the following statements about thermal energy transfer is true?

• When heat is transferred by conduction, particles collide but remain in the same location

• The Sun is the only source of radiation.

• Convection takes place most easily in solids.

• Convection does not occur naturally.

During energy transformations, energy is never __________.

• released as heat

• completely transformed

• created or destroyed

• used to increase an object's potential energy

Which is an increase in the size of a substance when the temperature is increased?

• diffusion

• thermal expansion

• kinetic fusion

• buoyancy

Heating appliances convert __________ to __________.

• electrical energy; thermal energy

• potential energy; kinetic energy

• mechanical energy; thermal energy

• thermal energy; chemical energy