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Astronomy
I have created some test practice for the science interactive we had in class.
| Question | Answer |
|---|---|
| The Earth _______ (spins) on its axis causing day and night. | Rotation |
| One complete ______ takes about 24 hours. | Rotation |
| The Earth ________ around the sun in an elliptical path. | Revolves |
| One_______ takes about 365.24 days or one year | Revolution |
| __________ is the tendency of an object to resist a change in motion. An object in motion stays in motion, an object at rest stays at rest. (Newton’s 1st Law of Motion | Inertia |
| __________ & ___________ combine to keep Earth in orbit around the sun and the moon in orbit around the Earth. | Gravity & Inertia |
| The Earth has ________ because its axis is _________ as it revolves around the sun. | seasons, tilted |
| The __________ of the moon you see depends on how much of the sunlit side of the moon faces the Earth. | phases |
| The moon does NOT produce its own light, it ___________ the sun’s light. | reflects |
| _____________ means to increase in size. The moon _____________from the right side to the left. | Waxing, Increases |
| ___________ means to decrease in size or grow smaller. The moon also ________ from the right side to the left.The length of time from New Moon to New Moon is 29.53 days (about a month). | Waning, Decreases |
| A __________________ happens when Earth is directly between the moon and the sun and Earth blocks sunlight from reaching the moon. A ____________________ can be total or partial. | Lunar Eclipse |
| A ___________________ happens when a new moon is directly between the Earth and the sun, blocking sunlight from the Earth. | Solar Eclipse |
| ____________, __________, _________, and __________ are the first four planets from the sun. They are small, dense, and have rocky surfaces and are known as _____________planets. | Mercury, Venus, Earth, Mars, Inner (Terrestrial) |
| ___________ – smallest planet, no moons, little atmosphere because it is small and has very little gravity to hold it, days are extremely hot and nights are extremely cold. | Mercury |
| ____________- density and size is similar to Earth, rotates opposite of Earth and takes about 8 months to make one rotation, very thick atmosphere of sulfuric acid, hottest planet because of the greenhouse effect of its dense gaseous atmosphere. | Venus |
| ___________– only planet known to support life, 70% water, atmosphere allows water to exist as liquid and contains enough oxygen (21%) to support life. | Earth |
| ___________– known as the red planet because iron-rich rocks, atmosphere is 95% carbon dioxide, scientists think Mars once had a large amount of liquid water and some solid water exists at the poles, axis is tilted and has season like Earth does. | Mars |
| The four outer planets are __________, __________, __________, and ____________. They are much larger, more massive and do not have solid surfaces so they are known as the ________________. | Jupiter, Saturn, Uranus, Neptune, Gas Giants (Outer Planets) |
| _________ – largest planet, many moons, thick atmosphere, has a Great Red Spot which is a storm larger than Earth. | Jupiter |
| _________– 2nd largest planet in our solar system, has average density less than water, known for its rings and has many moons | Saturn |
| _________– looks blue-green because of methane gas in its atmosphere, axis is tilted about 90 degrees so it appears to spin on its side, possibly hit by an object that knocked it on its side, has rings and moons. | Uranus |
| _________– has a solid surface and is much denser than the other outer planets, smaller than Earth’s moon, has a very elliptical orbit around the sun, reclassified as a dwarf planet. | Neptune |
| Before the 1500’s people thought that Earth was the center of the planets. This is the _______________ model. | Geocentric Model |
| Copernicus first said that the sun was the center of the planets. This is the ___________________ model. | Heliocentric Model |
| Some Scientists believe the universe formed about 10-15 million years ago through a huge explosion. This is known as the ______________________ Theory. | Big Bang |
| ___________are a collection of ice, dust, and small rocky particles. Orbits are usually very long, narrow ellipses. | Comets |
| ____________ – small, rocky objects, most revolve around the sun between the orbits of Mars and Jupiter in an area known as the ____________ belt. Believed to be leftover pieces of the solar system that never came together to form a planet. | Asteroid, Asteroid Belt |
| ____________ – chunk of rock or dust in space that come from comets or asteroids. | Meteors |
| ____________– streak of light caused by meteoroids as they burn up in the atmosphere. | Meteoroids |
| ____________– part of a meteoroid that made its way through Earth’s atmosphere and landed on the surface | Meteorites |
Created by:
SaanviB
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