"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 3

Description

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 3

1. What is chemistry

Chemistry is a basic natural science that studies the composition, structure, properties and changes of substances.

before reaction

Observe the color and state of the reactants. During the reaction, observe the conditions required for the reaction to occur (whether heating or other additional conditions are required).

during reaction

The phenomenon that occurs (whether there is precipitation, gas generation, whether there is light, heat or color change, etc.).

After reaction

Observe the color and state of the product.

Experiment 1 Water boiling experiment

1. Please tell me the color, state and smell of the water.

2. When water is heated and boiled, what happens at the mouth of the test tube?

3. What are the phenomena on dry-cooled glass pieces?

Experiment 2: Grind bile alum

1. What was the color and state of the bile alum before the change?

2. What is the color and state of the crushed bile alum?

3. What is the difference between bile alum before and after the change? Is the changed powder substance still the original bile alum? Why?

Think about it:

1. What do Experiment 1 and Experiment 2 have in common?

2. What do Experiment 3 and Experiment 4 have in common?

3. What are the essential differences between Experiments 1 and 2 and Experiments 3 and 4?

1. Physical changes and chemical changes

1. Physical changes: changes that do not produce other substances.

Phenomenon: volatilization, state change, shape change

2. Chemical changes:

When it changes, it produces changes in other substances. Chemical changes are also called chemical reactions.

Phenomenon: luminescence, heat generation, color change, gas release, precipitation formation

3. The essential difference between the two changes:

Whether other substances are generated during the change.

4. Connection: During the process of chemical change, physical change occurs at the same time.

Give it a try:

1. One of the following changes is different from the other three changes. This change is ( )

A. Evaporation B. Deformation

C. Water turns into ice D. Substances burn

2. The main basis for judging that burning charcoal in air is a chemical change is ( )

A. Produce red light B. Release a lot of heat

C. The colorless gas carbon dioxide is produced. D. The charcoal disappears.

2. Physical and chemical properties

1. Physical properties: Properties that are expressed without chemical changes.

Such as color, state, odor, water solubility, density, hardness, melting point, boiling point, etc.

2. Chemical properties: Properties expressed through chemical changes.

What substances does it react with, flammability, decomposition by heat?

Distinguish:

Which of the following are physical changes? What are chemical changes? What are physical properties? What are chemical properties?

A. Patina will decompose when heated;

B. Pure water is a colorless and odorless liquid;

C. Charcoal burns in the air to produce carbon dioxide;

D. Oxygen is not easily soluble in water and is denser than air;

E. The wooden stick broke due to force.

Keywords: Entering the world of chemistry teaching courseware, teaching courseware on the changes and properties of matter, People's Education Edition ninth grade chemistry PPT courseware download, ninth grade chemistry slide courseware download, entering the world of chemistry PPT courseware download, changes and properties of matter PPT courseware download, .PPT format;

For more information about the PPT courseware "Enter the Changes and Properties of Matter in the World of Chemistry", please click the "Entering the World of Chemistry ppt Changes and Properties of Matter ppt" tag.

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 8:

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 8 [Experiment 1-1] Operation: 1. Clamp the test tube containing a small amount of water diagonally on the iron stand. 2. Carefully heat the water at the bottom of the test tube until it boils. 3. Move a clean glass piece close to the test tube mouth. 【Experiment 1-2..

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 7:

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 7 1. Chemical Changes and Physical Changes Can you observe experiments? Before change: Observe the color and state of the reactants, and the conditions required for the reaction to occur (whether heating or other conditions are required). When changing: occurs..

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 6:

"Changes and Properties of Matter" Entering the World of Chemistry PPT Courseware 6 What is Chemistry? Chemistry is a natural science that studies the composition, structure, properties and changes of substances. The world is material, and matter moves and changes. How does matter change?

File Info

Update Time: 2024-09-21

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 1 industry PPT template

Preview