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EastWind [94]
3 years ago
11

Can anyone help with science please

Biology
1 answer:
katrin2010 [14]3 years ago
4 0
Question 8 is the 3rd bubble

question 9 is the 2nd bubble
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A group of students is conducting laboratory experiments on chemical compounds to determine similar reactivity of specific eleme
Crazy boy [7]
The answer is D

Consulting their chemistry teacher and other students in class would not be in depth enough, so A and B are not the answers.

While consulting a chemistry textbook will be useful, the scientific journal is not the best choice.

However, the chemistry textbook would be great, and the periodic table of elements os necessary if they are doing a study about it so the best answer would be D.

Hope this helps!
6 0
3 years ago
Read 2 more answers
Sometimes energy conservation is _______ or
adell [148]

Answer:

F) mandated.

Explanation:

Mandated by meaning is to, quote "issue an authoritative command". In this case, the authoritative command is the "law". The law is mandated and enforces the conservation of energy.

~

4 0
2 years ago
When electrons are removed from a food molecule, it is
sweet [91]

Answer:

Oxidized

Explanation:

5 0
2 years ago
Which of the following is an organic molecule?
Tpy6a [65]

Glucose is an organic molecule.

So the correct answer is B.

Hope this helps,

Davinia.

3 0
3 years ago
Read 2 more answers
Your friend brings you rocks with a thick layer of oxidation weathering, and no other visible signs of weathering. this is a clu
Vsevolod [243]
<span>A moist environment because physical weathering processes such as oxidation take place most quickly in the presence of water. There are three types of weathering, physical, chemical, and biological. For the physical weathering, there are two main types. Freeze-thaw cycles and exfoliation. Obviously the freeze-thaw cycles require water and the exfoliation generally happens through thermal expansion and contraction which doesn't require water. But since neither of these mechanisms were observed, that doesn't indicate if the area was wet or dry. Biological weathering is caused by plants or animals breaking down rocks via chemical (acid) or mechanical (root growth) means. Life generally indicates the presence of water, but since this form of weathering wasn't observed, we still don't have enough data. Chemical weathering is caused by rain water reacting with the rocks to form new minerals and salts. There are several types such as acidic rainwater dissolving part of the rock, and oxidation. With this in mind, let's take a look at the available options. A moist environment because there is a greater density of oxygen in the atmosphere in the presence of water. * Yes, we need a moist environment, but the density of oxygen is fairly constant world wide regardless of how moist or dry the environment is. So this is a bad choice. A moist environment because physical weathering processes such as oxidation take place most quickly in the presence of water. * Water speeds up chemical weathering of all types. So this is the correct choice. A dry environment because the increased albedo of deserts encourages physical weathering processes such as oxidation. * Yes, the increased albedo of deserts does speed up spalling, but oxidation is a CHEMICAL weathering process, not a PHYSICAL one. So this is a bad choice. A dry environment because in the absence of water oxidation is the dominant weathering process. * Water speeds up oxidation quite a bit. And since the observed oxidation is thick, there's been quite a bit of weathering. So this is a bad choice.</span>
6 0
3 years ago
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