"Water" Water and Air PPT Courseware 3

Description

"Water" Water and Air PPT Courseware 3

Riddles

What gets dirtier the more you wash it?

It cannot be grasped with both hands, nor can it be split with a thousand knives. It must be used for cooking and washing.

think

What methods can you think of to identify the objects in the bag?

(Stones, wood, leaves, water, vinegar, red ink, air)

Without opening the bag: hand-touch

Open the bag:

Eyes - see, nose - smell, mouth - taste, ears - hear

Note: Use with caution and ensure safety and hygiene before tasting!

Things to note when working together

1. Don’t open the bag yet;

2. Divide the work and cooperate within the group, assign a recorder to fill in the observation form;

3. During the observation, discuss in the group the reasons for making good judgments;

4. Fill out the observation form, pack the experimental supplies, sit up straight and wait quietly for other groups, and stop the discussion when the music stops.

Classify the objects in the bag

Group water, vinegar, and milk into one category and call them liquids

Group stones, wood, and leaves into a category called solids

Air is a separate category called gas

1. I will choose (there is only one correct answer for each question)

1. In what form does most of the water on the earth exist ( )

A. Solid B. Liquid C. Gaseous D. Uncertain

2. How can you tell the difference between water and white vinegar ( ) [multiple choices available]

A. smell B. see C. touch D. taste

Class summary

Know that objects in nature can usually be divided into three categories according to their states: gas, liquid and solid. The difference between them is that solids have a fixed shape, while liquids and gases do not.

Understand that water is a colorless, odorless, and transparent liquid. Living things are closely related to water. It is widely used in daily life, and water exists in the ocean, atmosphere, land, and living organisms.

Water resources are not inexhaustible

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Update Time: 2024-11-22

This template belongs to science courseware Third Grade Science Volume 1, Textbook Edition industry PPT template

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