Question

now go to the following link: composition of the earth (http://www.ducksters.com/science/composition_of_the_earth.php) composition of the earth: 1. is the earth one solid piece of rock? 2. are some of the parts of the earth constantly moving? 3. why can we compare the earth to an onion? 4. what are the four main layers of the earth? 1. 2. 3. 4. 6. what is the crust? 7. is the mantle thicker or thinner than the crust? 8. what are plate tectonics? 9. do these plates move? 10. what happens when these plates bump up against one another? 11. is the outer core a liquid or solid? 12. why is the earth’s outer core so important to the earth? 13. why is the earth’s inner core a solid and not a liquid, even though it is very, very hot? now go to: earth layers interface (http://www.harcourtschool.com/activity/science_up_close/606/deploy/interface.html) click start click on the diagram to learn more about the earths layers. answer the questions. first, click on the crust. 1. what can be found on the earth’s crust? 2. where is the crust thicker - under the continental shelf or under the oceans?

Explanation:

1. The Earth is not one solid piece of rock. It has multiple layers including the crust, mantle, outer - core and inner - core.
2. Yes, parts of the Earth are constantly moving. The tectonic plates in the crust and upper mantle move due to convection currents in the mantle.
3. The Earth can be compared to an onion because it has distinct layers, just like the layers of an onion.
4. The four main layers of the Earth are the crust, mantle, outer core, and inner core.
5. The crust is the thin, outermost solid shell of the Earth, on which we live.
6. The mantle is thicker than the crust.
7. Plate tectonics is the theory that Earth's lithosphere is divided into tectonic plates that move around on the asthenosphere.
8. Yes, these plates move due to convection currents in the mantle.
9. When plates bump into one another, it can cause earthquakes, the formation of mountains, and volcanic activity.
10. The outer core is a liquid.
11. The Earth's outer core is important because the movement of the liquid iron - nickel alloy in it generates the Earth's magnetic field.
12. The Earth's inner core is solid because of the extremely high pressure, which overcomes the effect of high temperature.
13. On the Earth's crust, we can find landforms like mountains, valleys, plains, as well as water bodies like oceans, lakes and rivers, and all forms of life.
14. The crust is thicker under the continental shelf.

Answer:

1. No.
2. Yes.
3. Because it has distinct layers.
4. Crust, Mantle, Outer Core, Inner Core.
5. The thin, outermost solid shell of the Earth.
6. The mantle is thicker.
7. The theory that Earth's lithosphere is divided into moving tectonic plates.
8. Yes.
9. Earthquakes, mountain - formation, volcanic activity.
10. Liquid.
11. It generates the Earth's magnetic field.
12. Due to extremely high pressure.
13. Landforms, water bodies, life.
14. Under the continental shelf.