"Diverse Rocks" Blue Earth PPT Courseware 4

Description

"Diverse Rocks" Blue Earth PPT Courseware 4

Rocks are the main component of the Earth and can be found everywhere.

Introduce the rocks you brought to your classmates:

1. Where was it collected?

2. What are its characteristics?

Rock: Naturally formed, produced by various geological processes.

Non-rock stone: synthetic, such as bricks, tiles, cement blocks, glass, etc.

Rock is one of the materials that make up the earth's crust and is the main component of the earth's lithosphere.

Rocks can be divided into three categories: igneous rocks, sedimentary rocks and metamorphic rocks according to their origin.

Ore is a special rock that can be exploited economically, and coal and oil-bearing rocks are special rocks.

Rocks are aggregates formed by geological processes, composed of one or more minerals, and have a certain structure. A few of them also contain the remains or remains of living things (i.e. fossils).

Rocks have three states: solid, gas (such as natural gas), and liquid (such as gasoline), with solid being the most common.

1. Observe and describe rocks

Put the collected rocks in a box and each person chooses a rock, uses their senses to observe it, and records their findings in the table.

What characteristics of rocks can we observe?

How did we observe it?

What words can we use to describe the characteristics of rocks?

Words that can describe the characteristics of rocks: smooth, rough...

Kind tips:

Words that can describe the characteristics of rocks: smooth, rough, shiny, dull, heavy, light, transparent, opaque, with or without patterns...

Kind tips:

1. As a group, each person chooses a rock to observe carefully.

2. Record your observations in Table 1 promptly.

3. After completing the record sheet, discuss within the group and provide each other with additional opinions.

Report and exchange

method:

1. How do I observe rocks?

2. What characteristics of rocks did I observe?

3. How would I describe the characteristics of rocks?

Now what can you tell someone what a rock is? What do the rocks look like?

Rocks are all natural and relatively hard. They are widely distributed on the earth. Rocks come in various colors, hardness, weight, whether the surface is patterned, smooth or rough, etc.

2. Classify rocks

Do the various rocks we collect have similar characteristics?

Can these rocks be classified?

If you were asked to classify these rocks, how would you classify them? Why is it divided like this?

Classify rocks

Number your group's rocks

Please choose any criterion to classify these rocks.

The group classification activity begins.

Exchange of rock classification results

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?

4. Are there any rocks that can be classified into different categories under different classification standards?

Why are these rocks different?

Please read the 81-page database "The Origin and Classification of Rocks" below to understand the reasons why different types of rocks are formed due to changes in earth motion.

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Update Time: 2024-10-20

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

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