RAP 1. _____force that keeps the planets from being pulled into the sun (gravity) 2. _____ contains galaxies, gas, energy, comets, space rocks (big bang theory) 3. _____ theory that says a large dense massive ball of gases exploded and the universe began (big Bang theory) 4.____person who came up with the heliocentric model (astronomers)e(as 5. _____ the motion of one object
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RAP 1._____force that keeps the planets from being pulled into the sun (gravity) 2. _____ contains galaxies, gas, energy, comets, space rocks (big bang.
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RAP1. _____force that keeps the planets from
being pulled into the sun (gravity)
2. _____ contains galaxies, gas, energy, comets, space rocks (big bang theory)
3. _____ theory that says a large dense massive ball of gases exploded and the universe began (big Bang theory)
4.____person who came up with the heliocentric model (astronomers)e(as
5. _____ the motion of one object moving around another object (rotation/revolution)
Key Questions
1. What causes the phases of the moon?
2. What is waxing?
3. What is waning
4. What are the phases of the moon?
1. The moon has phases because it revolves around the Earth and the sunlight hits the moon at different angles .
• 2. Waxing-getting larger• increasing light on the right
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• 3. Waning-light is getting smaller• no light on the right
18.2 Phases of the Moon• The lighted side of the Moon faces away
from Earth.• How the moon appears to Earth dwellers at
different positions in its orbit is shown below:
New Moon
•part of the moon facing Earth is dark•sunlight shines on the back side of the moon.•moon is between the Earth and the Sun.•Solar Eclipse•Spring tide