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jeka57 [31]
3 years ago
6

On the island of Hawaii, Keanu notices that the sand on the beach is black, the same color as the rock formations on the island.

Keanu realizes the sand used to be part of the rock formations. How did material from the rock formations turn into sand?
a

Rays from the sun shone down on the rock, and it broke into pieces.



b

If anything were left out for a long time, it would break into small pieces.



c


The sand was formed by earthquakes, tsunamis, and other natural disasters. These disasters were strong enough to break the rock into small pieces.


d

Wind and rain interacted with the rock, breaking it into small pieces.
Chemistry
1 answer:
qwelly [4]3 years ago
5 0

Answer:

D

Explanation:

Rocks turn into sand through heat, wind, and water. D is the most plausible in this situation since it takes time to break them down into sand.

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Please help i will give extra points
GREYUIT [131]

Answer:

B. Coal

Explanation: Coal is mined to produce energy.

3 0
2 years ago
The average distance between molecules always increases during which of the following phase changes?
vodomira [7]

Answer:

B. liquid to gas

Explanation:

Matter exists in 3 different states:

- Solid: in solids, particles in the substance are tightly bond to each other through strong intermolecular forces. Therefore, they can only vibrate around their fixed position, but they cannot move freely: as a result, the distance between the particles is the smallest among the 3 states of matter.

- Liquid: in a liquid, particles are able to slide past each other, however there are still intermolecular forces keeping them not too far from each other. As a result, in liquids, particles are on average more distance from each other compared to solids.

- Gas: in a gas, particles are completely free to move, as the intermolecular forces between them are negligible. As a result, in gases, the distance between molecules is the greatest, compared with solids and liquids.

Therefore, the phase changes in which the average distance between molecules increases is:

B. liquid to gas

4 0
3 years ago
Why can the same earthquake have different ratings on the 2 scales.
horsena [70]
The scales are different
5 0
3 years ago
For the reaction, identify the Lewis acid and the Lewis base.<br> AlF3 + CH3F → CH3+ + [AlF4]-
Ivanshal [37]
Answer:
            AlF₃ is Lewis Acid

            CH₃F is Lewis Base

Explanation:
                     According to Lewis concept ,"those compounds which donate pair of electrons are called as Lewis Base and those accepting pair of electrons are called as Lewis Acid.

In Given Reaction,
<span>                               AlF</span>₃<span> + CH</span>₃<span>F → CH</span>₃⁺<span> + [AlF</span>₄<span>]</span>⁻

AlF₃ is acting as acid because the octet of Al is not complete, hence it has tendency to accept electrons.

CH₃F is acting as a base because the F atom containing three lone pair of electrons can donate it to Al metal resulting in the formation of electrophile i.e. CH₃⁺.
5 0
2 years ago
i got a 9/10 on my science quiz today:D it was open notebook so it was easy. THEN i took another quiz and got 10/10!!! :DD
maw [93]
Good job!!!!
Explanation: congratulations
7 0
3 years ago
Read 2 more answers
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