1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marta_Voda [28]
4 years ago
15

Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It

contains 21% carbon dioxide. It blocks all radiation from the sun.
Biology
1 answer:
liberstina [14]4 years ago
3 0
The answer is 21% oxygen
You might be interested in
A warm and dry air mass would probably have begun
leva [86]
Over a tropical land region 
Hope this helps :)
5 0
3 years ago
Read 2 more answers
True or false? lymph fluid is composed mainly of water.
Gemiola [76]
The answer is True. Hope this helps.
8 0
3 years ago
Read 2 more answers
PLEASE HURRY I ONLY HAVE 2 MINS LEFT
Mars2501 [29]

Answer:

the answer is 2

when you get time friend me and i can explain it

3 0
3 years ago
During Anaerobic respiration, cells make energy without:
LenKa [72]

During anaerobic respiration , cells make energy without <u>Oxygen</u>

the energy obtained during anaerobic respiration is 2 ATP

3 0
3 years ago
What techniques do scientists use to study ocean sediments
artcher [175]
The instrument of choice would be the the clam shell sampler, which is also know as a grab sampler. Another instrument they use is the piston corer which is an open tube on a cable that gets dropped from a ship. 
4 0
3 years ago
Other questions:
  • What type of cloud is associated with hail
    11·1 answer
  • What do plants and animals confuse light pollution with
    11·2 answers
  • The science that applies the mechanical principles of physics and engineering to the investigation of human movement and the str
    7·1 answer
  • Describe the characteristics of water and carbon and why are they so important to living things?
    5·1 answer
  • Why do soils develop different horizons? What separates one horizon from another?
    12·1 answer
  • By what mechanism does refrigeration at 4°c slow food spoilage by contaminating microbes?
    11·2 answers
  • What are the reasons for an increase in the garbage that we generate?
    10·2 answers
  • The liquid produced by the skin that helps to cool down the body​
    6·2 answers
  • An ecological process is represented below. Which statement describes an event in this process?
    9·2 answers
  • 6 elements that are required in relatively large amounts in organisms???? I need help ASAP
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!