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Vilka [71]
3 years ago
10

The atmosphere of the early Earth is thought to have contained

Biology
2 answers:
konstantin123 [22]3 years ago
5 0
The answer is A.) carbon dioxide, water, oxygen, nitrogen, and hydrogen
Hope this helps 
Feel free to ask anymore questions here at brainly.com
Vlad1618 [11]3 years ago
4 0
The answer is a hope this helped :p
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Explain what a geographic information system (GIS) is, and describe how a GIS is enabling scientists
yulyashka [42]

Answer:

Explanation:

Geographic Information Systems (GIS) store, analyze and visualize data for geographic positions on Earth’s surface. GIS is a computer-based tool that examines spatial relationships, patterns and trends. By connecting geography with data, GIS better understands data using a geographic context.

5 0
3 years ago
The first organisms arose from non-living molecules found on early earth. Which theory best describes how
enyata [817]

Answer:

abiogenesis

Explanation:

a (not) biogenesis (coming from other life forms)

Biogenesis would mean that it's coming from other life forms,

Natural selection is a part of evolution (what is there to select?)

Variation is also a part of evolution (not related)

5 0
3 years ago
Algae are at the first trophic level. Flagfish are in the second trophic level. When a Flagfish eats algae, what percent of ener
dangina [55]

b. 10% of energy is transferred from the first to the second trophic level.

Explanation:

In trophic level flow of energy is one way, only a small amount of energy get transferred with the organism. A large amount of energy gets dissipated in life processes like respiration, reproduction and digestion. The energy is also released as waste product. Thus, only ten per-cent of the total energy is present in the organism.

The energy transfer does not depend on the number of trophic levels.

Each trophic level receives the 10% energy from the previous trophic level as when algae is eaten by flagship.

7 0
3 years ago
Wood deposits recovered from an archaeological site contain 36% of the C-14 they originally contained. How long ago did the tree
Veseljchak [2.6K]

Answer: It was obtained 8515 years ago

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) to find the rate constant:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{5760}=0.00012years^{-1}

b) for completion of 36% of reaction

t=\frac{2.303}{k}\log\frac{100}{36}

t=\frac{2.303}{0.00012}\log\frac{100}{36}

t = 8515 years

The time was 8515 years.

3 0
3 years ago
What is length?Name any two devices used for measuring the length.​
borishaifa [10]

Answer:

the size of something from one end to the other; how long something is

  1. Running race track
  2. tree

4 0
3 years ago
Read 2 more answers
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