Unit 1 Earth,Sun And Moon

Question 1

Matter

Answer 1

Definition: Material (stuff ) in an object,made from atoms and molecules.

Question 2

Mass

Answer 2

The measurement of matter.

Question 3

Gravity

Answer 3

Force of attraction between objects.

Question 4

Weight

Answer 4

Measurement of gravity pulling on mass.

Question 5

Vector

Answer 5

Arrow that represents magnitude (strength)and direction of force.

Question 6

Celestial object

Answer 6

Objects in outer space (ex;stars, planet’s,moons,black holes etc.)

Question 7

Revolution

Answer 7

The movement of a celestial object in a elliptical path around another.

Question 8

Orbit

Answer 8

The curved path of a celestial object around a star, planet, moon,etc.

Question 9

Axis

Answer 9

An imaginary line through the center of a celestial body about which it rotates.

Question 10

Gravitational force

Answer 10

A force of attraction between objects in space dependent on mass and distance.

Question 11

Rotation

Answer 11

The action of spinning around an axis.

Question 12

What 2 factors determine the Strength of gravity?

Answer 12

The 2 factors that determine the strength of gravity are

(1) mass
(2) distance

Question 13

Eclipse

Answer 13

To cover

Question 14

Lunar eclipse = “moon covered”

Answer 14

Moon is covered by the earths shadow

Question 15

Penumbra

Answer 15

Is a shadow cast by earth or moon over an area experiencing a partial eclipse.

Question 16

Solar eclipse =“sun covered”

Answer 16

Is when the sun is covered by the moons shadow.

Question 17

Umbra =“Solar eclipse,Lunar eclipse”

Answer 17

Fully shaded inter region (area) of a shadow.

Question 18

Direct

Answer 18

Head on

Question 19

Indirect

Answer 19

Bouncing off

Question 20

Tilted

Answer 20

Slanted;leaning

Question 21

Equator

Answer 21

A line separating the earth into the northern and Southern Hemisphere