What are plate tectonics?

Answers

Answer 1

Answer: Plate tectonics is a theory that the Earth's outer crusts are divided into seven plates that glide over the mantle. They are often blamed for earthquakes.

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What is the largest part of the earth: the core,the mantle, or the crust

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The answer to this question is: mantle.

the crust due to the fact that is has a larger circumference

What direction does a jet stream move across the U.S

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I think it goes east as it eventually reaches the UK and Europe

Where are the 2 main types of air pollution

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It would be our ozone layer, having to much of it creates global warming. Another would be carbon monoxide from forest fires or just fires etc.

Hoped this helped.

~Bob Ross®

-As Bob Ross said, the Ozone layer keeps the heat in. But this only aids in "Global Warming", and it is not an air pollutant.
-Also, Carbon Monoxide is not abundant enough to be considered a main air pollutant.

As we know, burning Octane (gasoline in cars) we are left with a byproduct in the combustion reaction which is Carbon Dioxide. Carbon dioxide is a gas at room temperature, but it is more dense than the oxygen and nitrogen in our atmosphere. Carbon Dioxide is poisonous to humans (that's why we exhale it from our bodies).

Another air pollutant is Sulfur. Long story short, when we mine for coal, sulfur deposits are released into the air. This sulfur reacts during lightning storms to create low amounts of acid. This acid then falls as "acid rain" harming structures and wildlife over time.

This cold river of air travels from west to east in the northern hemisphere. In winter, it dips south helping to bring cooler air to most parts of the United States. This is the _________ jet stream.A) polar
B) hadley
C) equatorial
D) subtropical

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A) polar!
Good luck!

A polar i had it for my usatestprep

(1) Why are weathering and erosion considered destructive forces?(2) What are sediments?Give and example of sediments and how they form.

(3) Describe the sequence of events information of a cave.

(4) How Could you tell if a glacier had once moved across a region?

(5) would the features of a marble statue last longer in a dry desert region or in warm, moist region that has heavy industry?exlain

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1. Weathering and erosion are destructive forces because they break down objects 2.Fossils are sedimentary and it is formed when rocks or soil accumulate.

3-
Best Answer: Solutional caves are the most frequently occurring caves and such caves form in rock that is soluble, such as limestone, but can also form in other rocks, including chalk, dolomite, marble, salt, and gypsum. Rock is dissolved by natural acid in groundwater that seeps through bedding-planes, faults, joints and so on. Over geological epochs cracks expand to become caves or cave systems.

The largest and most abundant solutional caves are located in limestone. Limestone dissolves under the action of rainwater and groundwater charged with H2CO3 (carbonic acid) and naturally occurring organic acids. The dissolution process produces a distinctive landform known as karst, characterized by sinkholes, and underground drainage. Limestone caves are often adorned with calcium carbonate formations produced through slow precipitation. These include flowstones, stalactites, stalagmites, helictites, soda straws and columns. These secondary mineral deposits in caves are called speleothems.

The portions of a solutional cave that are below the water table or the local level of the groundwater will be flooded.

The world's most spectacularly decorated cave is generally regarded to be Lechuguilla Cave in New Mexico. Lechuguilla and nearby Carlsbad Cavern are now believed to be examples of another type of solutional cave. They were formed by H2S (hydrogen sulfide) gas rising from below, where reservoirs of oil give off sulfurous fumes. This gas mixes with ground water and forms H2SO4 (sulfuric acid). The acid then dissolves the limestone from below, rather than from above, by acidic water percolating from the surface.

Which fossil occurs on the most landmasses? What does this suggest about when these particular continents broke up?

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The Glossopteridales (Glossopteris fossils) occur on the most landmasses. Their distribution across several detached landmasses led scientists to believe that these were once merged into a single supercontinent, Pangea. Their wide distribution suggests that the continents were still together in the times of their existence (298.9 millions of years ago-252.17 millions of years ago). Scientific evidence suggests that Pangea did indeed split after this, 175 million years ago.

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NEED HELP PLZ plz plzThe earth's crust is _____. thicker under the oceans than under the continents in motion because of convection currents in the mantle mostly made of iron and nickel made of one large piece called the crustal plate