Earth's Motion
This causes night and day on Earth
Rotation/Spinning of Earth on its axis
a force of attraction or pull between any two object is
Gravity
The way something appears or seems to move in the night sky is called apparent _______.
motion
a sphere of hot gases that gives off light and heat
a star
Something that takes up space and has mass is called
Matter
The tilt of Earth's axis affects what?
Length of day
The Moon's gravitational force causes this to happen and a bulge is created on the side facing away from the moon
Tides
this contains billions of stars, dust and gas that are held together by gravity
Galaxy
stars that are the hottest give off what color of gas
purple or blue
Trail mix is what type of mixture
heterogeneous
The Earths tilt is at what degree?
23.5 degree
A space rock that enters Earth's atmosphere
Meteor
Which two cultures called the streaks of light they saw in the sky "milky" circle and "road of milk"
Ancient Greeks and Ancient Romans
Cooler stars are what color
orange or red
mushrooms, bacteria and algae play what role in the ecosystem
they are decomposers
What two things cause Earth's seasons to happen
Earth's tilt and Earth's revolution around the Sun
The Moon's gravity is about what fraction of Earth's gravity?
1/16, 1/20, 1/10 or 1/6
1/6
Name the inner planets in order from the Sun
Mercury, Venus , Earth, Mars
Alpha Centaur is 4.2 light years away. How long did it take for the light to travel to get to us on Earth?
Four years and 3 months (must give at least four years in your response)
What is a consumer in the ecosystem
They eat other plants and animals to stay alive
During an equinox, how long is day and night?
12 hours long each
No matter the direction, Earth's gravity always pulls where?
Toward the center of the Earth
The Milky Way as more than how many billion stars
200 billion
According to our science textbook, Astronomers divide the sky into how many constellations
88
Name the four systems of Earth that work together
Hydrosphere, Atmosphere, Geosphere, Biosphere