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prisoha [69]
3 years ago
6

Why air is called protective layer of earth in 50 words

Biology
2 answers:
Vitek1552 [10]3 years ago
6 0
EARTH'S PROTECTIVE SHIELD. Earth is surrounded by invisible gases that form a thin protective blanket that we call the atmosphere. It contains the oxygen that we breath as well as other important gases such as nitrogen, carbon dioxide, water vapor, and ozone.
wariber [46]3 years ago
5 0
The stratosphere is crucial to life on Earth because it contains small amounts of ozone, a form of oxygen that prevents harmful UV rays from reaching Earth. The region within the stratosphere where this thin shell of ozone is found is called the ozone layer.
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Black coffee has a pH around 5; hand soap has a pH of 10. How many times more acidic is coffee relative
Anon25 [30]

Answer:

\boxed {\boxed {\sf 10^5 \ or \ 100,000 \ times \ more \ acidic}}

Explanation:

The pH scale stands for the power or potential of hydrogen. It measures how acidic or basic a solution based on the concentration of hydrogen ions and a scale from 1 to 14.

This scale is unique because it is logarithmic. So, every time the pH changes by 1 on the scale, the actual concentration of the solution increases or decreases by a tenfold.

So, a solution with a pH of 7 is ten times more acidic than a solution with a pH of 8. This can be translated to:

10^ {difference \ in \ pH}

The black coffee has a pH of 5 and the hand soap has a pH of 10. We want to find how many times more acidic coffee is, so we subtract 5 from 10 and get 5. The difference in pH is 5.

10^5=100,000

Coffee is <u>10⁵ or 100,000 times more acidic than hand soap.</u>

3 0
2 years ago
Farmer Tom only breeds the largest hogs, the fastest horses, and the cows 1 point
Marta_Voda [28]

Answer:

Artificial Selection

Explanation:

8 0
2 years ago
Read 2 more answers
Which best describes the role of a primary consumer in a food web?
Soloha48 [4]

Answer:

Herbivore that feeds on producers

Explanation:

The producers are plants at the bottom of the food web. These are eaten by herbivores, that are the primary consumers.

Herbivores themselves are consumed by carnivores, which are secondary consumers.

Sometimes, these carnivores can be consumed by top predators, like a shark, snake or eagle.

<u>Options and why they are right/wrong</u>

Carnivore that feeds on producers  - carnivores do not feed on producers

Herbivore that feeds on producers  - this is correct

Herbivore that feeds on primary consumers  - primary consumers are animals and herbivores do not eat animals

Carnivore that feeds on primary consumers - this would be a secondary consumer

4 0
3 years ago
Read 2 more answers
7. The periodic table has changed over time as new elements have been added to it. Which
damaskus [11]

Answer:

it will be the answer B. scientists discover new elenents.

6 0
2 years ago
Provide the term for base triplets on tRNA
Semmy [17]
The answer is anticodon.

Anticodons are base triplets on transfer RNA (tRNA). t<span>RNA carries amino acids to the ribosome for protein synthesis. </span>The prefix<em> anti-</em> suggests that anticodons are complementary to the codons on mRNA. Codons are base triplets on mRNA. So, anticodons of tRNA pair with codons of mRNA in the process of protein synthesis.
6 0
3 years ago
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