Astronomy Review Sheet



Astronomy Review Sheet

Don’t forget to study your worksheet packet, too!

Major Vocabulary:

- Astronomy- study of out space (planets, stars, moons)

- Solar System- the Sun, the planets, and their moons

- Spherical- round shaped like a ball

- Atmosphere- layer of gas found around some planets (including Earth)

- Inertia- a moving object will keep moving in a straight line until another force acts on it

- Gravity- the pull between two objects (the bigger object wins)

- Orbit- the path a planet takes around the Sun

- Revolution- one trip of a planet around the Sun

- Rotation- the spinning of a planet on its axis

- Axis- the imaginary line through a planet from the North to South pole. (The Earth’s axis is tilted 23.5◦ towards the North Star)

- Elliptical- the oval shape of the planets’ orbits

- Intensity- how strong/ how much (refers to amount of sunlight)

- Terrestrial- planets that are made of earth/rocks

o Mercury, Venus, Earth, Mars

- Gaseous- planets that are made of gases

o Jupiter, Saturn, Uranus, Neptune

- Phases- different stages or parts

- Crescent- the skinny piece of the moon in the sky

- Gibbous- the almost full moon (like a big belly)

- Waxing- when the moon appears to grow in size

- Waning- when the moon appears to shrink in size

Main Concepts:

- Order of the Planets

- Rotation and Revolution of the Planets

- Characteristics of the Planets

- Characteristics of Earth (atmosphere, 70% water, rock)

- Why the Planets’ Orbit (inertia and gravity)

- The Earth’s Seasons

- The Earth’s Day and Night

- Order of the Phases of the Moon

- Our Star, the Sun

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