Science (4th) Ch. 8 Lesson 3: The Solar System
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the Sun and all the objects that orbit around it
solar system
a large sphere in space that orbits a star
planet
a force of attraction, or pull between objects
gravity
a device that collects light and makes distant objects appear closer and larger
telescope
a chunk of ice, rock, and dust that orbits the Sun
comet
a chunk of rock or metal that orbits the Sun
asteroid
a piece of rock, ice or metal that burns up in Earth’s atmosphere causing a streak of light to appear in the sky
meteor
a meteor that hit Earth’s surface
meteorite
The Sun is at the _________ of the solar system.
center
Planets, moons, and other objects orbit around the _________.
Sun
________, as well as the Moon cannot make their own light. They also reflect the Sun’s light so we can see them.
Planets
Who validated Copernicus’ model of the solar system using his telescope?
Galileo
What did Galileo use to validate Copernicus’ model of the solar system?
telescope
What makes faraway objects seem closer?
telescope
The (inner outer) planets are (rocky smooth) planets.
inner rocky
What are the inner planets that are rocky?
Mercury, Venus, Earth & Mars
What planet is the closest to the Sun?
Mercury
What planet is the hottest planet?
Venus
Venus rotates very (fast slowly) on its axis. This makes one day on Venus last _______ Earth days.
slowly 243
What two planets are very close in size?
Earth & Venus
Mars is (smaller larger) than Earth?
smaller
What is the only planet with the right conditions to support life?
Earth
What are the two things that Earth has to support life?
oxygen & liquid water
The outer planets are (tiny giant) planets?
giant