Question

introduction: a webquest is a way for you to explore a topic, such as \the layers of the earth\ and find useful information to help you understand the topic. in this webquest, you will be visiting web sites that will help you better understand the earths interior, continental drift, plate tectonics and how these topics fit together. directions: using search engines (google, bing, duck duck go, yahoo, ask, etc.) and the internet links provided answer the questions below to learn more about the layers of the earth. earths interior earth is many thousand kilometers in depth. if you could travel deep into the earths surface you would find it contains three main layers: the crust, the mantle and the core. to learn more about the layers of earth, search the internet and click on the following links and answer the questions that follow: read the definitions. using the internet. answer the questions that follow: crust - the rigid, rocky outer surface of the earth, composed mostly of basalt and granite. the crust is thinner under the oceans. question: what type(s) of rock(s) are basalt and granite? question: how were these rocks formed? inner core - the solid iron - nickel center of the earth that is very hot and under great pressure. question: what is the inner core made of? mantle - a rocky layer located under the crust - it is composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. convection (heat) currents carry heat from the hot inner mantle to the cooler outer mantle. question: the mantle is divided into two sections. what do we call the top half section of the mantle? question: what do we call the bottom half section of the mantle? question: the mantle the thickest layer of the earth. how thick is it? question: what types of currents are formed in the mantle? outer core - the molten iron - nickel layer that surrounds the inner core. question: what is the outer core made of?

Explanation:

Basalt and granite are igneous rocks. Igneous rocks form from the cooling and solidification of magma or lava. The inner - core is made of solid iron - nickel. The top half section of the mantle is the upper mantle, the bottom half is the lower mantle. The mantle is about 2,900 kilometers thick. Convection (heat) currents are formed in the mantle. The outer core is made of molten iron - nickel.

Answer:

What type(s) of rock(s) are basalt and granite?: Igneous rocks
How were these rocks formed?: From the cooling and solidification of magma or lava
What is the inner core made of?: Solid iron - nickel
What do we call the top half section of the mantle?: Upper mantle
What do we call the bottom half section of the mantle?: Lower mantle
How thick is the mantle?: About 2,900 kilometers
What types of currents are formed in the mantle?: Convection (heat) currents
What is the outer core made of?: Molten iron - nickel