"Why Shadows Change" Flagpole and Shadow PPT Courseware 3

"Why Shadows Change" Flagpole and Shadow PPT Courseware 3

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"Why Shadows Change" Flagpole and Shadow PPT Courseware 3

teaching objectives:

1. Through teaching, let students know the movement pattern of the sun in the sky every day;

Understand that changes in temperature and shadow throughout the day are related to the movement of the sun.

2. Able to use simple measurement tools to quantitatively observe shadow length and temperature changes, collect data, and make simple records and analyses.

3. Through the study of this course, students can further understand that natural things and phenomena are interconnected and influence each other.

Think about it:

How does the sun change direction throughout the day?

East - South - West

How does the height of the sun change throughout the day?

low - high - low

Make plans and clarify tasks

How should we design experiments to test our conjectures?

Simulation experiment

Task: Shadow length and direction changes

Experimental exploration

1. Get materials

2. Fix the straw on the white paper

3. Use a flashlight as the sun

4. Measure the length and direction of the shadow

5. Record

Analyze histogram

How does the length of a shadow in sunlight change throughout the day?

When is the longest time?

When is the shortest time?

Fill it out

Throughout the day, the shadow of the same object not only changes in ( ), but also changes in ( ). The shadow of an object ( ) is the longest, ( ) is the shortest and is aligned with the direction of the sun’s motion ( ).

little judge

1. The direction of the shadow is the same as the direction of the sun. ( )

2. The higher the sun is, the longer the shadow of an object. ( )

3. The change of the sun's position in the sky is closely related to our lives. ( )

4. Everything under the sun has a shadow. ( )

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For more information about the "Flagpole and Shadow Why the Shadow Changes" PPT courseware, please click the Flagpole and Shadow PPT Why the Shadow Changes PPT tag.

"Why Does the Shadow Change" Flagpole and Shadow PPT Courseware 4:

"Why does the shadow change" Flagpole and Shadow PPT Courseware 4 Conditions for shadow production: What conditions are needed to see a clear shadow? Have light and opaque objects. To see a clear shadow, you must shine light on an opaque object to see it.

"Why Does the Shadow Change" Flagpole and Shadow PPT Courseware 2:

"Why does the shadow change" Flagpole and Shadow PPT Courseware 2 Conditions for shadow production: What conditions are needed to see a clear shadow? Have light and opaque objects. To see a clear shadow, you must shine light on an opaque object to see it.

"Why does the shadow change" flagpole and shadow PPT courseware:

"Why Does the Shadow Change" Flagpole and Shadow PPT Courseware Conditions for shadow production: What conditions are needed to see a clear shadow? Have light and opaque objects. To see a clear shadow, you must shine light on an opaque object to see it.

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