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almond37 [142]
4 years ago
14

What is the composition of earths atmosphere

Biology
1 answer:
gogolik [260]4 years ago
7 0

The earth's atmosphere consists mainly of nitrogen and oxygen with smaller proportions of other gases such as carbon dioxide. The amount of carbon dioxide in the atmosphere is maintained through a balance between processes such as photosynthesis, respiration and combustion. However this balance is being affected by human activities which are polluting the atmosphere.

The proportion of these gases in the atmosphere is as follows: nitrogen is the most abundant at 78%, oxygen is next at 21%,  while others  include carbon dioxide at 0.037% and argon at 0.9 % .

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Scale Piots.
kati45 [8]

Answer:

The independent variables is Texting speed in words.

Dependent variable is minutes.

Explanation:

Independent variable is a variable that can stand on it own and does not depend on other variable to change.

Minutes is independent variable, it can stand in it's own.

Dependent variable is a variable that depend on another variable. Texting speed is dependent variable because it's depend on time to change or stand.

4 0
3 years ago
Read 2 more answers
Place the rock layers in order from oldest to youngest in the blanks below. Type the letters as they
yarga [219]

Answer:

C

Explanation:

The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: Layer C formed.

3 0
3 years ago
In species where males provide the bulk of the parental care, males are most likely to
aivan3 [116]
This question is incomplete. The options are:
<span>a. be choosy about which females they mate with.
b. be indiscriminant about which females they mate with.
c. mate with as many females as possible.
d. compete to mate with choosy females.
</span>
The answer is a: be choosy about which females they mate with. 
This is because the male would in this case be investing a lot of energy in parenting its young, and would therefore adopt a strategy of mating with one or very few females. It therefore makes sense that the male would be choosy in regards to its mate. 
5 0
3 years ago
Which of the following do all living things have in common?
Illusion [34]

Answer:

D

Explanation:

all living things are made up of many cells

6 0
2 years ago
Read 2 more answers
Select all the correct answers.
Naddik [55]

Answer:

circulatory system is the answer

5 0
2 years ago
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