"Earthquake" The Unquiet Earth PPT Courseware 3

Description

"Earthquake" The Unquiet Earth PPT Courseware 3

Experimental requirements:

Use towels and sticks to simulate rock layers:

(1) Fold the towel into a rectangle, hold the two ends of the towel with your hands and squeeze it toward the middle. What phenomenon will you find?

(2) Hold both ends of the wooden stick and apply force again. Observe what will happen? How do your hands feel?

Thinking: What does the experimental phenomenon show? Can you reason and imagine how earthquakes are formed?

Experimental results

Rock formations underground deform under pressure.

When the force is too great to bear, the rock formation will break suddenly and rapidly.

The seismic waves generated by the fracture of rock layers will cause vibrations on the surface when they reach the surface. This is an earthquake.

Kind tips

1. Pay attention to safety and don’t let the sticks hurt yourself and your classmates.

2. Divide work and cooperate within the group and carefully observe experimental phenomena.

3. After the experiment, pack away the experimental materials.

do you know?

There are often some precursors before earthquakes, such as sudden rise and fall of groundwater, turning and swirling, well water bubbling, changing smell, becoming muddy, animals panicking, and abnormal weather.

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For more information about the PPT courseware "Earthquake and Unquiet Earth", please click the Earthquake ppt and Unquiet Earth ppt tag.

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Update Time: 2024-11-18

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

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