Page 81 - Science Course 1 (Book 2)
P. 81
Mo8-L6b: What are the Process That Transfer Thermal Energy?
What are the Process That Transfer Convection current
Mo8-L6b
Thermal Energy? is the movement of f uids in a cycle because of
convection.
KEY CONCEPTS:
1. What happens to a material when it is heated?
Vocabulary A-Z
Let us learn some vocabulary
Thermal expansion Let’s Begin
is an increase in a material’s volume when its
temperature increases.
Thermal Expansion and Contraction
Thermal contraction is a decrease in a material’s
volume when its temperature decreases.
Thermal expansion is an increase in a material’s
volume when its temperature increases.
Thermal contraction
is a decrease in a material’s volume when its
temperature decreases.
Thermal expansion and contraction are most notice-
able in gases, less noticeable in liquids, and the least
noticeable in solids.
Key Concept
What are the Processes that Transfer Thermal
Energy?
What happens to the volume of a gas when it is
heated?
Convection
is the transfer of thermal energy by the movement of
particles from one part of a material to another.
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