Page 96 - Science Course 1 (Book 2)

Mo9-L1: Vocabulary Review

Direction: On the line before each def nition, write the letter of the term that matches it correctly.
Each term is used only once.

1. system that contains all Earth’s water A. atmosphere
B. biosphere
2. naturally occurring solid made mainly of minerals
C. core
3. mixture of gases that forms a layer around Earth
D. crust
4. innermost layer of geosphere E. geosphere
F. hydrosphere
5. solid part of Earth
G. mantle
6. thick, middle layer of geosphere
H. mineral
7. most common gas in atmosphere I. nitrogen
J. rock
8. Earth system that contains all living things

9. outermost layer of geosphere

10. inorganic, naturally occurring solid with crystal structure and def nite
chemical composition

Mo9-L1: Key Concept Organizer

Direction: Use the table to draw a circle graph showing the composition of gases in the atmosphere.

Composition of the Atmosphere

Percentage in
Gas
Atmosphere
Nitrogen 78%

Oxygen 21%

Trace gases 1%

Direction: Label this graph by writing the correct term from the word bank on each line.

exosphere mesosphere stratosphere thermosphere troposphere

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