Weather composition of air Flashcards
1
Q
Oxygen makes _____% of the air
A
21%
2
Q
Where is oxygen found in?
A
air, water, and soil
3
Q
Respiratio
A
The process when living things take in oxygen in order to break down digested food to produce energy.
4
Q
Nitrogen makes ______% of the air.
A
78%
5
Q
What living things use nitrogen?
A
the roots of some plants to use it to form nitrates, e.g. peanuts
and
fixing bacteria in the soil
6
Q
What gas is essential to photosynthesis?
A
Carbon dioxide
7
Q
Carbon dioxide is combined with what to make food, simple sugars and oxygen.
A
Water and the energy from sunlight.
8
Q
What are 5 rare gases.
A
helium, argon, exon, neon, krypton
9
Q
Rare gasses are _____ meaning they are not chemically active.
A
inert
10
Q
A
