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stars and planets
Practice for a sience test on space GRADE 5
Question | Answer |
---|---|
How many planets are there? | 8 |
How many days is one revolution for Earth? | 365 1/4 days |
How many hours is one rotation? | 24 hours |
What is an orbit? | a path |
What is a moon? | Any smaller object that revolves around a planet |
Earth's moon's surface has what 3 main things? | no liquid water,no living things,more craters than Earth |
What is a crater? | A bowl shaped area on the surface of a planet or moon |
What is an eclipse? | when one body in space blocks light from reaching another body in space |
What is a lunar eclipse? | Full moon passes through the shadow of Earth |
What is a solar eclipse? | New moon casts a shadow on Earth |
Name the colors of the stars from the hottest color to coolest color. | Blue,White,Yellow,Red |
What is the nearest star to our solar system? | our sun |
About how many stars are in the Milky Way Galaxy? | 200-500 billion stars |
Which arm are we in? | Orion arm |
What is a galaxy made of? | Billions of stars,planets,gas and dusts |
What are astronomers? | People who study space |
The sun holds what percentage of mass for our solar system? | 99% |
What two gasses are stars made up of? | Hydrogen and helium (constantly reacting,make nuclear fusion and give off light energy and heat energy) |
What does our sun do other than giving off light energy and heat energy? | Sun's gravity holds all our planets in orbit |
What does are solar system contain? | Planets,moons,sun,meteoroids,comets,asteroids |
What are asteroids? | Rocky objects(minor planets)big pieces |
What are meteoroids? | Rocky or small objects (in space) |
What are meteors? | Meteoroids that went into the Earth's atmosphere but has no reached Earth's surface(have long burning tails) |
What are meteorites? | Meteoroids that have reached Earth's surface. |
What are comets? | Tails of gas and dust (contains:rock,ice,gas)orbit close to the sun or far out past neptune |
Where is the astroid belt? | Between Mars and Jupiter |
What is 1 AU? | Distance from sun to earth |
What is the biggest planet? | Jupiter |
What is the smallest planet? | Mercury |
Which kind of planets are denser? | INNER PLANETS |
Which 2 planets do not have moons? | Mercury and Venus |
Which kind of planets have more moons? | Outer planets |
Which planet is more dense? | Earth |
When is the test? | NEXT WEDNESDAY |
Is orbit a noun or a verb? | noun |