CHEMISTRY MIDDLE SCHOOL

Suppose you are digging a hole in the ground. You notice that the soil is in two layers. Each layer has particles of different sizes. You observe the soil closely and find that the bottom layer is made up mostly of sand and the top layer is made up mostly of clay. What do you think caused the soil to have two different layers?

Answers

Answer 1
Answer: the layering of different densities along with erosion and weathering
Answer 2
Answer:

Answer:

its d

Explanation:

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Valuable ore deposits and gem crystals are often associated with _____.

a. oceans

b.oil deposits

c. thin crustal areas

d. igneous intrusions

 

Which of the following shows a possible sequence that leads to the formation of sedimentary rocks?

a. squeezing, heating, bending, folding

b. rising, weathering, erosion

c. weathering deposition, compaction, cementation

d. melting, cooling, crystallization

 

PLZ HELP!! :)

Answers

For the first question:
Valuable ore deposits and gem crystals are often associated with igneous intrusions. So for this question the correct option is option “d”. An example like the Pegmatite’s, which are a form of igneous intrusions, is responsible for the creation of variety of gems like topaz and tourmaline.
For the second question:
For this specific question, option “c” seems to be the correct option. Weathering, deposition, compaction, cementation are the possible sequence that leads to the formation of sedimentary rocks.





Valuable ore deposits and gem crystals are often associated with igneous intrusions and The possible sequence that leads to the formation of sedimentary rocks is weathering, deposition, compaction, cementation. Thus, the correct options are option D and C.

Sedimentary rocks are types of rocks that are formed through the accumulation and lithification (compaction and cementation) of sediment particles. Sediments can include fragments of rocks, minerals, organic material, and other debris that are transported and deposited by water, wind, ice, or gravity.

Over time, these sediments undergo compaction and cementation processes, where the particles are pressed together and bound by minerals, creating solid rock formations. Sedimentary rocks often exhibit distinct layers or stratification, and they can contain fossils and provide valuable information about Earth's history and past environments.

Examples of sedimentary rocks include sandstone, limestone, shale, and conglomerate.

Learn more about Sedimentary rocks, here:

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Which of these statements explains the relationship among elements, compounds, and mixtures? A. Elements are made of compounds and mixtures. B. Both compounds and mixtures are made up of elements. C. Mixtures are made of elements, and elements are made of compounds. D. Compounds are made of mixtures, and mixtures are made of elements.

Answers

the answer is answer D

Answer:

Its B, both compounds and mixtures are made up of elements.

What weather conditions would you expect on the windy side of a mountain?

Answers

you would expect low humidity and low air pressure because as you go higher into the atmosphere the less air you get because your going into outter space. No matter what amount of clothes you wear as you get higher and higher you get colder and colder

Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil.

Answers

The process is called fractional distillation.  It works by heating up the crude oil inside a chamber to a boil (vaporizing it). Due to the fact that each component of crude oil has a different boiling point, each component of the crude oil will condense at a different height inside the chamber since the chamber gets colder the further up you go away from the heat source. Since each component condenses at different heights in the chamber, there are places to collect condensing liquid at different heights in the chamber (The heights correspond to the boiling point of each component).  These collection areas will collect only the component of crude oil that condenses at that temperature.  The condensing point is basically the boiling point which means the lower in the chamber that component condenses at, the higher the boiling point for that component is and therefore the heavier that component is (the heavier components get collected near the bottom of the chamber while the lighter components get collected near the top of the chamber).

I hope this helps.  Let me know if anything is unclear.

Final answer:

Petrol is separated from the hydrocarbons in crude oil via fractional distillation, a process that uses the different boiling points of hydrocarbons to separate them. Lighter hydrocarbons like petrol vaporize at lower temperatures and are then condensed and collected separately.

different fractions, including petrol from the crude oil.

Explanation:

Petrol is separated from a mixture of hydrocarbons in crude oil through a process known as fractional distillation. This process takes advantage of the different boiling points of hydrocarbons present in crude oil. The crude oil is heated, and as the temperature increases, different hydrocarbons begin to vaporize.

For example, petrol, which is composed of relatively light hydrocarbons, will vaporize at lower temperatures compared to heavier hydrocarbons like diesel or lubricating oil. After being vaporized, the hydrocarbons are condensed and collected separately, effectively separating the

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List 3 ways that scientists investigate and learn about the natural world?

Answers

3 ways that scientists investigate and learn about the natural world would include:
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Why is a pyramid used to describe the energy available at different layers in an ecosystem

Answers

because the higher up u go the smaller it gets
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