EarthSci

Question 1

Compromises all the space, time, all matter and energy in it.

Answer 1

Universe

Question 2

How many galaxies does the universe have

Answer 2

300-400 billion

Question 3

What is the name of our galaxy

Answer 3

Milky Way

Question 4

gas,dust, and billions of star and their solar system, all held together by gravity

Answer 4

Galaxy

Question 5

How much baryonic matter in the galaxy

Answer 5

4.6%

Question 6

How much Cold matter

Answer 6

24%

Question 7

Matter that has gravity but does not emit light

Answer 7

Cold dark matter

Question 8

How much Dark energy

Answer 8

71.4%

Question 9

Force that oppose gravity

Answer 9

Dark energy

Question 10

Unit of astronomical distance equivalent to the distance hat light travels in one year

Answer 10

Light year

Question 11

light year number

Answer 11

9.4607x10^12 km

Question 12

A fixed, spherical earth resides at the center of the universe, surrounded by concentric celestial spheres of planets and stars

Answer 12

Geocentric theory

Question 13

discoverd geocentric theory

Answer 13

Aristotle

Question 14

Theory that proposes that earth is a planet in motion around the sun

Answer 14

Heliocentric theory

Question 15

Who discoverd heliocentric theory

Answer 15

Nicolaus Copernicus

Question 16

toward the red end of the spectrum

velocity-distance relationship

Answer 16

Red shift or doppler shift

Question 17

discovered red shift

Answer 17

Edwin Hubble

Question 18

explosion for unknown reasons & began to expand rapidly

Answer 18

Bigbang theory

Question 19

enormous rotating cloud from which the solar system evolved

Answer 19

Solar Nebula

Question 20

solar nebula is composed of what

Answer 20

Hydrogen and helium

Question 21

beging to form from metallic and rockyclumps

Answer 21

Inner planets

Question 22

began forming from fragment with a high percentage of ices

Answer 22

larger outer planets

Question 23

is a small, rock body whose diameter can range from a few hundred kilometers to less than a kilometer

Answer 23

Asteroid

Question 24

pieces of rocky and metallic materials held together by frozen gasas

Answer 24

Comets

Question 25

Most famous short peiod comet

Answer 25

Halley’s comet

Question 26

small (sand size) space rock usually left behind from passing comet

Answer 26

meteoroid

Question 27

a meteoroid burning through the atmosphere (shooting star)

Answer 27

Meteor

Question 28

a meteor that reaches the earth

Answer 28

meteorite