2. Lunar Exploration

3. Video is a little long but shows past, present, and future lunar exploration.

4. Eclipses

5. What is an eclipse?
Occurs when one heavenly body moves into the shadow of another heavenly body
Two types: lunar and solar

6. Lunar Eclipses Occurs when Earth moves between the sun and the moon
Earth’s shadow falls on the moon’s surface
Can occur only when the moon is full
Total lunar eclipse - occurs when moon & sun are on the exact opposite sides of Earth
Partial lunar eclipse - only a portion of the moon enters Earth’s shadow

7. Solar Eclipses The moon blocks the sun’s light from reaching Earth
Total Solar Eclipse - sun moon and Earth must be in a direct line; sky becomes very dark like night
Partial Solar Eclipse - sun moon and Earth are not completely lined up and there is a dark shadow on only parts of Earth’s surface
Annular Solar Eclipse - moon is farthest position from Earth and thus only blocks part of the sun

8. Seasons

9. It’s All About Earth’s Tilt
Earth is tilted 23.5 degrees on it’s axis
June = Summer in Northern Hemisphere
Sun shines directly on Northern Hemisphere making it summer
December = Winter in Northern Hemisphere
Sun shines indirectly on Northern hemisphere making it winter

11. Solar Energy Radiant energy emitted by the sun
Amount of direct sunlight in Northern Hemisphere is greatest during what season?
Why is it hotter in July than it is in January?

13. Energy and Natural Catastrophes

14. Energy for Catastrophes
Remnant Energy - heat or kinetic energy left over from earlier in the history of the Earth and Solar System
Solar Energy - received from the sun in the form of light, other electromagnetic energy, or particles
Radioactive energy - from the decay of radioactive isotopes in Earth’s interior

15. How do Volcanoes Work?
Heating occurs within Earth’s crust or near the top of the mantle and rock partly melts
What causes this heating?
Lava is expelled onto Earth’s surface primarily by work of gases that exsolve from the melt as it rises; as magma rises the pressure begins to decrease and bubbling occurs increasing the volume
Molten rock reaches Earth’s surface and then begins to cool

16. Lunar Phases