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densk [106]
3 years ago
12

What is the percentage of nitrogen in Earth's atmosphere? A) 1% B) 21% C) 78% D) 95%

Biology
2 answers:
Ahat [919]3 years ago
5 0
The answer is C.... Hope this could help
marishachu [46]3 years ago
5 0
Hey Sweetie! I'll gladly answer this question for you! I'll give you the answer....

Here it is: The right answer is the option B. Close to 99 percent. The atmosphere is a mixture of gases: nitrogen, oxygen, CO2, H2O, argon, among others. Nitrogen is about 78% and oxygen is about 21%, so they two together constitute about 99 percent of the Earth's atmosphere.


78% of nitrogen, 21% oxygen, and 1% of carbon dioxide and other gases.



Hope I helped you!



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6 0
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3 years ago
I NEED HELP ASAP!
Hoochie [10]

Answer:

From factory emissions to carbon dioxide in the atmosphere (C)

The process occurring can be called Combustion. In this process, organic matter is burned in the presence of oxygen (oxidizer). It releases energy and carbon dioxide because the carbon in organic matter is oxidized to form CO2.

from dead organisms to fossils and fossil fuels (E)

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from factory emissions to carbon dioxide in the atmosphere (C) & from carbon dioxide in the atmosphere to photosynthesis (B)

Two reactions represent the conversation of mass and energy. The burning of fossil fuel (mass) releases energy and carbon dioxide, which is again used by plants to store energy in the process of photosynthesis. This is shown in C and B part of the figure

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3 0
2 years ago
How do you define weight on Earth?
alisha [4.7K]

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Option A is correct

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Hope it helps you ✌️

4 0
3 years ago
An event lasts 4 hours and 20 minutes. How long did the event last in seconds?
daser333 [38]

The event last in 15,600 seconds.

Answer: Option B

<u>Explanation:</u>

We know that there is 60 seconds in one minute i.e., 1 minute = 60 seconds

There is 60 minutes in one hour. i.e., 60 minutes = 1 hour.

Given : An event lasts 4 hours and 20 minutes

4 hours contains 240 minutes,

               4 \times 60=240 \text { minutes }

When the above expressed in seconds,

              240 \times 60=14400 \text { seconds } ------>eq. 1

When 20 minutes expressed in seconds,

              20 \times 60=1200 \text { seconds }------->eq. 2

Adding both eq. 1 and 2, we get

          4 hours and 20 minutes = 14400 + 1200 = 15600 seconds

7 0
3 years ago
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