Middle School Earth/Space Science

Question 1

Geocentric

Answer 1

having or representing the earth as the center, as in former astronomical systems.

measured from or considered in relation to the center of the earth.

Question 2

Heliocentric

Answer 2

having or representing the sun as the center, as in the accepted astronomical model of the solar system

measured from or considered in relation to the center of the sun.

Question 3

Apparent motion

Answer 3

how objects appear to move. For example, due to Earth’s rotation, the sun seems to rise and set each day

Question 4

Actual motion

Answer 4

how objects actually move. For example, Earth rotates on its axis.

Question 5

Retrograde motion

Answer 5

orbital or rotational motion of an object in the direction opposite the rotation of its primary

Question 6

Gravity

Answer 6

A force that tries to pull objects with mass together. The more mass an object has, the stronger it’s gravity. The more distance an object is from another, the weaker the gravity

Question 7

What is our galaxy?

Answer 7

Milky way

Question 8

What is a local group?

Answer 8

Local group of galaxies