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Bryant M.
Teacher for Seven Years, Tutor for Five years.
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Environmental Science
TutorMe
Question:

Describe two types of weathering in rocks.

Bryant M.
Answer:

Two types of weathering could include: 1. Onion skin weathering - The sun warms the surface of a rock by day and by night it cools down, causing the surface to expand and contract. Eventually, it breaks away just like an onion peel. 2. Freeze-thaw weathering- Water in a crack in a rock freezes and expands, making the crack bigger. After freezing and thawing numerous times, bits of rock will break off.

Basic Chemistry
TutorMe
Question:

A student sprays deodorant in the corner of a changing room. After a while, everyone in the room can smell the deodorant. Describe how this process works.

Bryant M.
Answer:

The deodorant gas particles move from areas of higher concentration to areas of lower concentration by bumping randomly into the air particles and spreading out as a result.

Biology
TutorMe
Question:

Name the two hormones produced by the pancreas and say i) in what circumstances, ii) in what way, they adjust the glucose concentration in the blood.

Bryant M.
Answer:

The pancreas produces the hormones glucagon and insulin. i ) Glucagon is produced in response to a fall in the concentration of glucose in the blood; it stimulates the liver to release glucose. ii ) insulin is produced in response to a rise in the concentration of glucose in the blood; it stimulates the liver to convert glucose to glycogen.

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