"Diverse Rocks" Blue Earth PPT Courseware 2

Description

"Diverse Rocks" Blue Earth PPT Courseware 2

Classification tips:

1. How many categories do we divide rocks into? According to what standard?

2. How many different classification methods have we thought of?

3. Do different classification methods have the same results?

The structure of the earth's interior

Earth's crust: average thickness 17 kilometers

Mantle: depth above 2900 kilometers to the crust

Earth's core: depth below 2,900 kilometers

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Range: The top of the Earth's crust and upper mantle (above the asthenosphere)

The lithosphere is made up of rocks; rocks are made up of minerals;

Minerals are composed of elements (elements and compounds).

Classification of rocks

igneous rock

Classification by origin Sedimentary rocks

metamorphic rock

⑴ Igneous rocks: can be divided into extrusive rocks and intrusive rocks. Common extrusive rocks include: pumice, perlite and other intrusive rocks. Common intrusive rocks include: granite, basalt, etc.

⑵ Sedimentary rocks: Characteristics ① Bedding ② Fossils Common ones include shale, sandstone, and limestone

⑶Metamorphic rock: The original rock is formed by changes in structure or composition under the action of heat and pressure within the earth.

Common ones include marble, slate, gneiss, etc.

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"Diverse Rocks" Blue Earth PPT Courseware 4:

"Various Rocks" Blue Earth PPT Courseware 4 Rocks are the main component of the earth and can be seen everywhere. Introduce the rocks you brought to your classmates: 1. Where did you collect them? 2. What are its characteristics? Rock: Naturally formed in various places...

"Diverse Rocks" Blue Earth PPT Courseware 3:

"Various Rocks" Blue Earth PPT Courseware 3 Warm Tips: 1. As a group, each person chooses a rock and observes it carefully. 2. Record your observations in Table 1 promptly. 3. After completing the recording sheet, discuss within the group and provide each other with additional opinions. After classification...

"Diverse Rocks" Blue Earth PPT courseware:

"Various Rocks" Blue Earth PPT Courseware What are rocks? Rocks are solid minerals or mixtures of minerals. The rocks under the sea are called reefs, reefs and sand. They are aggregates composed of one or more minerals and have a certain structure. There are also a few...

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Update Time: 2024-11-25

This template belongs to science courseware People's Education Press Fourth Grade Science Volume 1 industry PPT template

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