Earth and Space Summative Flashcards Preview

Science 7 Grade > Earth and Space Summative > Flashcards

Flashcards in Earth and Space Summative Deck (28):
1

What is a nebula?

A cloud of gas and dust, it is also where stars are born.

2

What are the forces in the nebula?

Gravity, temperature, and equilibrium.

3

What does gravity in a nebula do?

It pulls inward.

4

What does temperature do in a nebula?

It moves particles and creates opposing force to gravity (pressure.)

5

What does the equilibrium do in a nebula?

It makes the gravity and pressure equal.

6

What is a characteristic for a nebula?

Static nebula.

7

How does a solar system start to form? (something hit the nebula)

Collisions or a supernova.

8

When a supernova or collision happens what gets upset?

The equilibrium.

9

When the equilibrium is upset what happens?

Gravity overcomes the pressure.

10

When gravity overcomes pressure in the equilibrium what happens?

The nebula collapses inward which triggers the process of the solar system formation happens. Then the star formation starts also.

11

What happens when the nebula collapses inward?

The nebula begins to spin and flatten.

12

When a nebula spins and flattens what happens?

The center warms greatly.

13

When the middle of the nebula warms what happens?

Star forms as hydrogen fusion begins.

14

When hydrogen fusion begins what happens?

Solar winds come blow out all the extra gas and dust.

15

What happens after solar winds come in?

Planetesimals form.

16

What happens to the planetesimals when they are forming?

They gather dust and gas in their path, and thats how collisions occur.

17

In a solar system formation what are 5 things it includes?

Star, planets, moons, asteroid belt, and comets.

18

What does pressure do in a nebula?

Force pushes outward.

19

What is the first thing that forms in a nebula?

The star.

20

How does the sun produce energy?

Hydrogen fusion.

21

Are new stars still forming today?

Yes.

22

What is gravity?

An attractive force that acts between two or more objects. It exists everywhere in the universe.

23

As distance of two objects decreases the gravity force between them ____?

Increases.

24

As the distance of two objects increase what happens to gravity force between them?

Decrease.

25

If gravity force is turned off in earths orbit which way will earth go?

The direction it is orbiting in.

26

If you increase the size of the star what happens to gravity?

It increases.

27

What happens if you move the star and planet farther away from each other(gravity)?

Gravity decreases.

28

What happens if you decrease the size of the planet?

Gravity decreases.