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Page 1: Web viewenergy transfer. One substance loses heat energy and the other substance gains heat energy. Heat energy flows from a . hotter . substance to a . colder

When heat energy is transferred from one substance to another, the heat energy moves from the hotter substance to the colder substance. Temperature is a measure of how hot or cold a substance is. The higher the temperature of an object, the hotter is the object.

A thermometer is something that measures how hot or cold an object is. In other words, a thermometer measures the temperature of an object.

Anytime two substances with different temperatures come together, there is an energy transfer. One substance loses heat energy and the other substance gains heat energy.

Heat energy flows from a hotter substance to a colder substance.

For example, if the ice cube in the diagram is placed in the container of water, there is an energy transfer. The hotter substance (here the water) loses heat energy and the colder substance (the ice cube) gains heat energy.

The water and its container lose heat energy and become cooler.

The ice cube gains heat energy and becomes warmer (this causes the ice cube to melt).

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Name:____________________

Class:____________________

Date:____________________

How Temperature Affects Heat Energy

transfere

Physical Processes

http://scienceprojectideasforkids.com/wp-content/uploads/2010/10/Energy-heat-cold-hot.jpg
Page 2: Web viewenergy transfer. One substance loses heat energy and the other substance gains heat energy. Heat energy flows from a . hotter . substance to a . colder

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Page 3: Web viewenergy transfer. One substance loses heat energy and the other substance gains heat energy. Heat energy flows from a . hotter . substance to a . colder

Pre reading question:

Q1: What is thermometer?

Q2: Classify the following materials to their states of matter:

Milk / bread / oxygen / table / juice / nitrogen.

Solid Liquid Gas

During reading questions:

Q1: Put (T) if the statement is true and (F) if the statement is false:

1. The ice cube gains heat energy to become water ( )

2. The higher the temperature of an object, the hotter is the object. ( )

3. The heat energy moves from the colder substance to the hotter substance ( )

Q2: What happens to heat energy when a cold substance and hot substance come together?

___________________________________________________________

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Page 4: Web viewenergy transfer. One substance loses heat energy and the other substance gains heat energy. Heat energy flows from a . hotter . substance to a . colder

Q3: In what direction does heat energy flow?

Q4: Look at the following picture and answer the questions bellow:

a. Which one is hotter the water or the car?

___________________________________

b. What is the state of matter of the water

after pouring on the car?

_____________________________________

Post - reading questions:

Draw a diagram to show how energy transfers in glass A. Draw what glass would like after 1 hour.

4A B


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