"Thermal Expansion and Cold Contraction" Changes in Matter PPT Courseware 2

Description

"Thermal Expansion and Cold Contraction" Changes in Matter PPT Courseware 2

learning target:

1. Able to ask questions about phenomena in life and design simple scientific experiments.

2. Obtain scientific conclusions through a large number of gas and solid experiments, and realize that scientific experiments can be repeatedly verified.

3. Can explain the phenomenon of thermal expansion and contraction in daily life.

gas conjecture

Expansion when heated

cold shrink

Think about it: How do you make a flat ping pong ball inflate?

What is the rationale for this?

design experiment

Do solids also have the property of expanding with heat and contracting with cold?

in conclusion

What are the applications?

Solids, liquids and gases all expand with heat and contract with cold.

practise

1 When pouring cement on the road surface, use thin wooden boards to divide it into small pieces for the purpose of ( )

AConvenient construction

B Prevent water from seeping down

C Prevent pavement damage due to thermal expansion and contraction

2 Xiao Ming put the empty bottle with the rubber stopper in the refrigerator and took it out after 15 minutes. The stopper could not be removed. The main reason was ( )

The air in bottle A leaked out

B bottle mouth shrinks when exposed to cold

The gas in bottle C shrinks when it gets cold

When the pen cap cannot be unscrewed, put the pen cap end into hot water and take it out after a while, then it can be unscrewed. Explain the reason.

Practice to achieve standards

1. In general, objects (liquids, solids, gases) have _______ properties. Objects of different materials expand with heat and contract _______. Under the same circumstances, _______ expands the most when heated, _______ more, and _______ the least.

2. In winter, the driver's uncle drained the water from the chassis. The reason was ( ).

A． The water is too hot B. Too much water D. Freezing water will cause damage to the chassis

3. The oil tank cannot be filled too full to avoid ( ).

A． Too much oil and the oil tank was crushed B. Oil expands when heated and overflows

4. Let’s talk about the measures people take to prevent thermal expansion and contraction in the following scenarios.

5． Do you know how to peel hard-boiled eggs?

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For more information about the PPT courseware "Changes of Matter Thermal Expansion and Contraction", please click on the Changes of Matter ppt Thermal Expansion and Contraction ppt tag.

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Update Time: 2024-06-29

This template belongs to science courseware People's Education Press Fifth Grade Science Volume 2 industry PPT template

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