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Space
| Question | Answer |
|---|---|
| Solar System | Holds the Sun, the planets and all other objects that orbit the Sun. Ours is called "The Milky Way" |
| Planet | a large body in space that orbits a star and does not produce light on its own |
| Gravity | a natural force that pulls two objects toward one another and holds our solar system in place |
| Moon | a natural object that revolves around a planet |
| Earth | 3rd planet from the sun, the only planet in the solar system on which life is known to exist |
| Asteroid | a rocky object that orbits the Sun, found mostly in the region between Mars and Jupiter |
| Comet | a small object in space that orbits a star and is made of ice, dust particles, and frozen gases |
| Sun | Our Solar System's star that is made of hydrogen and helium gases, and supplies the heat and light that sustains life on Earth |
| Meteor | a piece of rock or metal from space that enters Earth's atmosphere |
| Revolution | the movement of an object around another object. The earth does this around the sun every 365.25 days |
| Rotation | An object spins on its axis. The earth does this every 24 hours |
| Mercury | The closest planet to the sun. The smallest planet. |
| Venus | The 2nd planet from the sun. The hottest planet. Known as Earth's sister planet. |
| Mars | The 4th planet from the sun |
| Jupiter | The 5th planet form the sun. The largest planet. |
| Saturn | The 6th planet from the sun. Has the most visible rings made of ice and dust. |
| Uranus | The 7th planet from the sun. Only planet that rotates on its side. |
| Neptune | The farthest planet from the sun |
| Pluto | Largest dwarf planet at the edge of our solar system. Does not have enough mass to have the needed gravity to be a full planet. |
| Cause of the Tides | The gravitational pull of the moon |
| Cause of the Seasons | The tilt of the Earth's axis and the elliptical shape of Earth's orbit |
| Cause of Day and Night | Earth's rotation on its axis |
| Solar Eclipse | Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth |
| Lunar Eclipse | Occurs at a full moon when Earth is directly between the moon and the sun |
| Nicolaus Copernicus | A Polish astronomer who first proposed the theory that the sun was the center of the solar system. |
| Galileo | Italian astronomer who improved the telescope to confirm the heliocentric model |
| Heliocentric Model | Sun-centered model of the solar system |
| Geocentric Model | Earth-centered model of the solar system |
| new moon | The phase that occurs when the moon is between the Earth and Sun. 0% of the moon's face is lit. |
| waxing | The term used when the illuminated portion of the moon increases every night. Right side of moon is lit. |
| full moon | The phase that occurs when the Earth is between the moon and Sun. 100% of the moon's face is lit. |
| waning | The term used when the illuminated portion of the moon decreases every night. Left side of moon is lit. |
| crescent | Term that refers to less than half of the Moon's face illuminated |
| gibbous | Term that refers to more than half of the Moon's face illuminated |
| Month | The time period it takes for the moon to go through all of its phases (New moon to New moon). Approximately 27.3 days |
| Day | The time period it takes for Earth to complete one full rotation |
| Year | The time period it takes for Earth to complete one full revolution |
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