"Make a Pebble" PPT courseware

Description

"Make a Pebble" PPT courseware

Part One: Characteristics of Pebbles

Pebbles, regardless of size, are all smooth and rounded in shape like bird eggs.

Simulation experiment: Make a pebble

Experimental equipment materials:

alcohol lamp sink

tweezers matches

transparent plastic bottle

broken bricks water

Experimental class requirements: observe carefully and think carefully

Focus on recording, pay attention to safety, and maintain hygiene

Part Two: Thinking about Problems

Thinking: How are pebbles formed in nature?

Data card: Rocks located on the surface of the earth's crust or close to the ground are affected by factors such as temperature, water, vegetation, etc., and will be broken or changed in composition, and gradually disintegrate and separate into rock fragments or soil layers of varying sizes. This change in the rock is called weathering. The process that causes this change in rocks is called weathering.

The river is like a porter, moving rocks from the upper reaches to the middle reaches and to the lower reaches. This function of river water is called transportation. Rocks with sharp edges and corners are constantly colliding and rubbing with each other during the transportation of river water. The edges and corners will gradually be worn away, and the volume will gradually become smaller and become pebbles. This effect is called rounding.

The rocks on the mountains collapsed due to weathering. During the erosion process of the river, they were transported and rounded by the water to form pebbles.

Pebbles are formed gradually over a long period of time. The formation process of pebbles can be divided into two stages. The first stage is the rock weathering and collapse stage; the second stage is the stage when the rocks are transported and rounded by the river water.

Keywords: Qingdao version fifth grade science PPT courseware for the second volume free download, make a pebble PPT download, .PPT format;

For more information about the "Make a Pebble" PPT courseware, please click the Make a Pebble ppt tag.

"Make a Pebble" PPT download:

"Making a Pebble" PPT Download Part One: Examining Pebbles When you walk on a river or beach, you can see many rocks without edges like walnuts and peas. People call these rocks pebbles. Seeing these colorful pebbles and crystal...

"Make a Pebble" PPT:

"Making a Pebble" PPT Part One Content: The Formation of Pebbles (1) Have you ever seen a pebble? What do they look like? Observe the pictures and objects and talk about the characteristics of the pebbles. Characteristics of pebbles: Pebbles, regardless of size, are all shaped like bird eggs, smooth and round. ..

File Info

Update Time: 2024-11-21

This template belongs to science courseware Qingdao Edition Fifth Grade Science Volume 2 industry PPT template

Preview