Question

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.crust 2.mantle 3.outer core 4.inner core 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 earths outer core so important to the earth? 13. why is the earths inner core a solid and not a liquid, even though it is very. now go to: earth layers interface (http://www.harcourtschool.com/activity/science_up_close/606/deploy/interface) click start click on the diagram to learn more about the earths layers. answer the q first, click on the crust. 1. what can be found on the earths crust? 2. where is the crust thicker - under the continental shelf or under the

Explanation:

1. The Earth is not one solid piece of rock as it has different layers.
2. Some parts of the Earth, like tectonic plates, are constantly moving due to convection currents in the mantle.
3. The Earth can be compared to an onion because it has distinct layers such as the crust, mantle, outer - core, and inner - core.
4. The crust is the outermost solid shell of the Earth.
5. The mantle is thicker than the crust.
6. Plate tectonics is the theory that Earth's lithosphere is divided into tectonic plates that move around on the asthenosphere.
7. These plates do move.
8. When plates bump into one another, it can cause earthquakes, mountain - building, and volcanic activity.
9. The outer core is a liquid layer composed mainly of iron and nickel.
10. The Earth's outer core is important as it generates the Earth's magnetic field through the movement of the liquid iron, which protects the Earth from harmful solar radiation.
11. The Earth's inner core is a solid due to the extremely high pressure at the center of the Earth, which overcomes the high temperatures that would otherwise keep it in a liquid state.
12. On the Earth's crust, we can find landforms like mountains, valleys, plains, and also water bodies like oceans, lakes, and rivers, as well as all life on Earth.
13. 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 crust is the outermost solid shell of the Earth
6. Thicker
7. The theory that Earth's lithosphere is divided into tectonic plates that move on the asthenosphere
8. Yes
9. Earthquakes, mountain - building, volcanic activity
10. Liquid
11. It generates the Earth's magnetic field
12. High pressure makes it solid despite high temperatures
13. Landforms, water bodies, life; under the continental shelf