Effects of Heat, Expansion and Contraction Lesson 1

At the end of this lesson,

You should be able to:

• state energy is transferred (by heating) from a region of higher temperature to a region of lower temperature until thermal equilibrium is achieved between the two regions

• ​relate the change in temperature of an object to the gain or the loss of heat of the object

Objectives of the lesson

Multiple Choice

Heat passes from...

• High to low
• Cold to hot
• Hot to cold
• Heat cannot be passed

Multiple Choice

Heat always travels from _______________________________.

• a colder place to a hotter place until both places reach the same temperature.

• a hotter place to a colder place until both places reach the same temperature.

Multiple Choice

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high

Open Ended

Describe the direction of heat transfer.

At the end of this lesson,

You should be able to:

• state the effects of heat gain/loss on a body.

• explain expansion of a body using particle theory of matter. ​

Objectives of the lesson

Multiple Choice

Heat makes things _______________________

• colder
• warmer
• faster

Multiple Choice

Things get colder = ____________ heat

• loses

• gains

Multiple Choice

Objects loses heat and _________. 

• expand
• contract

Multiple Choice

Objects gain heat and _________. 

• expand
• contract

Multiple Choice

Thermal expansion occurs when particles of matter move farther apart as temperature increase.

• True

• False

Multiple Choice

Which of the following happens by the addition of heat?

• Condensation
• Boiling

• Freezing

Multiple Choice

Which of the following happens from the removal of heat?

• solid to liquid
• liquid to gas
• solid to gas
• gas to liquid

Multiple Choice

Which of the following can happen as a result from adding or removing thermal energy?

• explosion
• change of state of matter

Multiple Choice

A student places a pot of water on a stove. As the water boils, how does the state of the water change?

• from solid to liquid

• from liquid to solid

• from liquid to gas

• from gas to liquid

Multiple Choice

An ice cube is placed in a pan. The pan is placed on an open flame. Which change will MOST likely happen over time? 

• The ice changes to a gas then to a liquid.
• The ice changes  to a gas and then back to a solid.
• The ice changes to a liquid then to a gas.
• The ice changes to a liquid and back to a solid. 

Open Ended

List down all the effects of heat on a body.

Multiple Choice

Thermal expansion occurs when particles of matter move farther apart as temperature increase.

• True

• False

Multiple Choice

When temperature increases, distance between molecules ______________.

• decreases

• increases

• stays the same

Multiple Choice

When temperature decreases, distance between molecules ____________.

• increases

• decreases

• stays the same

Multiple Choice

Does the size of the particles change when you apply heat to a body?

• Yes

• No

Multiple Choice

Does the siz of the particles change when you apply heat to a body?

• Yes

• No

Multiple Choice

What is Thermal expansion?

• The transfer of thermal energy between materials by the collisions of particles 
• Is a decrease in a materials volume when temperature decreases 
• An increase in a materials volume when temperature increases
• Chicken fried rice

Multiple Choice

What is Thermal Contraction 

• A Potato
• A decrease in a materials  volume when its temperature decreases 
• The movement of fluids in a cycle because of convection 
• A material through which  thermal energy does not flow easily.

Multiple Choice

The liquid in the thermometer rises when it is placed in the hot water because ___________. 

• it gains heat from the hot water and expands.
• loses heat from the hot water and contracts. 
• the surrounding air is too warm. 
• the liquid is boiling. 

Multiple Choice

An increase in the volume of a material due to a temperature increase in the material.

• Thermal contraction

• Thermal expansion

• Thermal heat

Open Ended

Describe what is thermal expansion.

Multiple Choice

_______________ is an increase in the volume of a substance when the temperature is increased.

• kinetic energy

• potential energy

• thermal point

• thermal expansion

Multiple Choice

Which state of matter shows the largest change in volume when warmed or cooled?

• Solid

• Liquid

• Gas

• Metal

Open Ended

Why does a substance expand when it is heated?

Multiple Choice

Why do liquids expand more than solids?

• Solid particles don't move at all.

• In a solid, particles are held in a fixed arrangement and can't move around as much.

• Liquids are slippery

• Particles in a liquid are more attracted to each other than in a solid.