Final Review Universe Earth Sun Moon 100 100

Final Review

Universe Earth Sun Moon 100 100 200 200 300 300 400 400 500 500

5 billion years Scientists believe the Earth and our solar system formed about _____ years ago. Row 1, Col 1

Sun…the only star in our solar system! The closest star to Planet Earth is _____. Venus Sun North Star 1, 2

Moon…the moon’s gravity causes our ocean tides This celestial object orbits, revolves around, the Earth; it is Earth’s natural satellite. 1, 3

Water, Sunlight, carbon dioxide, and chlorophyll Green plants, producers, are able to produce food. What are The 4 things plants need for photosynthesis? 1, 4

Crust…made of solid rock The thinnest layer of the Earth. 2, 1

Stars…balls of burning gases The only objects in the Universe that produce their own light… moons, stars, planets 2, 2

FALSE…it reflects the Sun’s light True or False The Moon shines in the sky because it produces light. 2, 3

Seasons We have ____ because the Earth is tilted at about 23 ½° and it orbits the Sun… • When the Sun rises higher in the sky, due to Earth’s tilt, it gives more concentrated heating to Earth’s surface. • More daylight hours, due to Earth’s tilt, produces more heating of Earth’s surface. 2, 4

lithosphere Another name for the Earth’s crust. 3, 1

Gravity The planets, moons, and other celestial bodies stay in their orbits around the Sun because of this force: 3, 2

phases When we look at the Moon over several days, it seems to change shape. These moon shapes are called __. 3, 3

365 and ¼ Days How long does it take The Earth to make one revolution orbit the Sun one time? 3, 4

24 hours (1 rotation = 1 day) How long does it take the Earth to rotate (spin or turn) one time? 4, 1

Circle The Earth revolves (orbits) around the Sun. The Earth’s path around the Sun is slightly elliptical (oval), It’s path is almost a ____. 4, 2

½ How much of the Moon is always “lit” by the Sun? 4, 3

Water Cycle Earth recycles the water on Its surface; it is called the ___. Liquid water changes to a gas = evaporation Rain, sleet, hail, and snow are forms of precipitation Water vapor condenses to form clouds = condensation 4, 4

Orbit the Sun (revolution) One year on Earth is the time it takes the Earth to ______. 5, 1

atmosphere The layer of gases that surround a planet. nitrogen and ____ oxygen _______ are the two main gases that blanket Earth. 5, 2

Galaxy (Earth is in the Milky Way galaxy) A group of billions of stars is called a ____ 5, 3

Earth’s Rotation(spin) The Sun appears to move across the sky each day; it rises in the east and sets in the west. The Sun is not moving, it is the ____ 5, 4