PRAXIS SCIENCE 5905 STUDY GUIDE
1. is the study of the history of life on Earth.:
Paleon- tology
2.Earth is believed to be .:
4.5 billion years old
3.protects Earth from harmful solar wind particles; responsible for the
North- ern Lights (Aurora Borealis); lies deep within the Earth:
Earth's Magnetic Field
4.charged particles escape from the sun's gravitational pull:
Solar Wind
5.What would be most different about an object on Mars than Earth?:
Weight
6.What are the four inner planets: solid, liquid, or gas?:
, Solid
7.What are the four outer planets: solid, liquid, or gas?:
Gas (MVEM(Mars)JSUN)
8. is the left over remains of a star after it explodes:
Super Nova
9. is the study of space:
Astronomy
10. is the star at the center of Earth's solar system:
Sun
11.What is the sun made of?:
Hydrogen and Helium
12.How many Earth's could fit into the Sun?:
109
,13.Define Nuclear Fusion.:
how the sun produces heat and shines; when lighter elements become
heavier
14.True or False: Earth is much closer to the sun than other planets?:
True
15. is how heat goes from sun to Earth.:
Radiation
16.Includes asteroids and comets which are small rocky or icy objects that
orbit the sun and are clustered into the
and found between the orbits of Mars and Jupiter.:
Asteroid Belt
17.Our solar system is part of a bigger star system called a
.
: Galaxy
18.A is made up of stars, dust, and gas.
, : Galaxy
19.The galaxy that is home to Earth is known as the
.:
Milky Way
20.The planet that is closest to Earth's size is .:
Venus
21.A is mostly made of ice, dust, and gas.:
Comet
22.A is a light flashing in the sky from space.:
Meteoroid
23.What will happen if you drop a ball from space?:
It will fall slower and take longer
24.How long will it be before we see a star that explodes 15 light
years away?:
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