The Sun and Us

1. The Sun and Us The Sun’s Energy

2. The Sun’s Energy • Energy leaves the sun in the form of heat and electromagnetic radiation • Result from the fusion reactions in the sun

3. The Sun’s Energy • Fission – splitting of atoms (nuclear bombs) • Fusion – fusing of nuclei to form heavier elements (hydrogen to helium) • IMMENSE amts. of energy and neutrons released

4. The Sun’s Energy

5. Sun’s Energy • In form of Electromagnetic Energy Waves • Energy absorbed or radiated by particles • Include x-rays, gamma rays, visible light, etc • Lots of it may be harmful to life

6. Sun’s Energy • Lots of harmful radiation absorbed or reflected by atmosphere • Earth’s magnetism also reflects radiation

7. Solar Energy • Some radiation gets through • Visible light spectrum

9. Sun’s Energy • Solar energy that reaches Earth’s surface is… • Turned into chemical energy by process called photosynthesis • Leads to our own energy

10. Earth’s Energy • Solar energy that reaches Earth’s surface is… • Reflected/absorbed by land and water • Takes LOTS of energy to heat up water • Why do you think this is important?

11. LAB TIME!!!!