Sains - Kelas 2 - Rabu, 12 Agustus 2020
SD Muhammadiyah 1 GKB Gresik Tahun Pelajaran 2020 - 2021
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- What are light sources ?
- Things that give us light are called light sources.
- We can see when light from light sources enters our eyes.
- Examples of light sources :
1. The sun
2. The lamp
- What are some natural sources of light ?
• The sun is our main light sources in the day.
• It is a natural source of light.
- The examples of natural sources of light:
1. Fireflies
2. Lightning
3. Volcanic lava
4. Stars
5. Northren light

- What are some man-made sources of lights?
- The lamp is a man-made sources of light.
- Which of these man-made light sources do you have at home?
1. Street Lamp
2. Traffic light
3. Candle
4. Campfire
5. Flashlight

- What is darkness ?
- When there is no light, there is total darkness.
- We cannot see when no light enters our eyes.
How are shadows formed?
How are shadows formed?
Can you see the dark areas on the grass in front of these trees?
How are they formed?
When the trees blocks the Sun’s light, dark areas are formed on the grass. These are shadows.
A shadow is formed when light is blocked.
Things can form shadows of different shapes and sizes.
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