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Marizza181 [45]
3 years ago
11

Which statements show the importance of clean air?

Biology
1 answer:
telo118 [61]3 years ago
7 0
I think it’s a&c. I could be wrong, but at least try
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How does gravity cause erosion?
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Answer:

By pulling down rocks and particles.

Explanation:

For example, in a cliff, where rocks are being pulled down by gravity. Their particles and small pieces of rock are forced to fall apart, slowly eroding down any rock or sediment.

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3 years ago
When a person is exercising, the body needs to deliver increased amounts of oxygen to the muscles. Which component of blood ensu
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The red blood corpuscles have a pigment called hemoglobin that binds to the oxygen and carries it to the whole body in both the conditions, when the body is at rest or when the body is exercising. The oxygenated blood from the heart is carried to the various parts of the body and the de-oxygenated blood from various parts of the body is carried to the lungs where the exchange of gases takes place.

5 0
3 years ago
Read 2 more answers
On the beach, he built _____ huge sandcastle.
wel

the is a definite article meaning that you cannot use it

"an" can only be used before words beginning with vowels  

therefore the answer is" a"

8 0
3 years ago
Mary and Tommy are measuring 10 grams of sugar on an electronic balance that measures to the hundredths of a gram. Tommy records
PolarNik [594]

<u>Answer:</u> The correct answer is Option C.

<u>Explanation:</u>

Precision refers to the closeness of two or more measurements to each other.

For Example: If you weigh a given substance five times and you get 3.2 kg each time. Then the measurement is very precise.  

Accuracy refers to the closeness of a measured value to a standard or known value.

For Example: If the mass of a substance is 32 kg and one person weighed 31 kg and another person weighed 29 kg. Then, the weight measured by first person is more accurate.

According to the question:

Mass weighed by Mary = 10.00 g

Mass weighed by Tommy = 10 g

As, mass weighed by Mary is reported upto 2 decimal places. Thus, it is more precise.

Hence, the correct answer is Option C.

6 0
3 years ago
Describe one problem that scientists must overcome to develop a vaccine for HIV
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Answer:

they must focus on it instead of focusing on useless information

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