Cycles of Matter
Authored by Pamela Shealer
Science
8th Grade
Used 13+ times
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62 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What makes up 78% of the air we breathe?
oxygen
free nitrogen
fixed nitrogen
carbon
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where is free nitrogen fixed?
in the nodules on the roots
in the stems
in the decomposers
in cow's intestines
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best explains why nitrogen fixation must take place?
Atmospheric nitrogen is unusable to plants and animals
Nitrogen must be returned to the atmosphere
Animals must breathe in nitrogen
Nitrogen gets "stuck" in the soil and must be untrapped
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the overall purpose of photosynthesis?
To use energy from the sun to produce food for the plant
To use energy from the sun to produce oxygen for animals to breathe
To break down food in order to produce energy (ATP)
To break down food in order to produce carbon dioxide
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What gas is released by plants from the process of photosynthesis?
air
carbon dioxide
oxygen
hydrogen
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Photosynthesis
absorbs CO2
releases CO2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How animals get the nitrogen they need
from the air they breathe
from the water they drink
from the food they eat
from the Sun
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