Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science grade 9 > Astronomy > Flashcards

Astronomy Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is astronomy?

A

A branch of science that deals with space and the whole universe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is an astronomical unit?

A

A unit of measurement (au) to measure the distance from the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a light year?

A

A unit used to measure the distance that light travels in one year (measures the distance from the sun)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is it said that if we look into the sky, we’re looking to the past?

A

Because it could take a star hundreds of light years to reach us and when it arrives, it is long dead.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are galaxies?

A

A system of millions & billions of stars of which our solar system is part of.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What galaxy do we live in?

A

We live in the Milky Way.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are to different shapes of galaxies?

A

Spiral, elliptical, lenticular, & irregular.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What type of shape does our galaxy have?

A

Our galaxy (Milky Way) is a spiral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is our galaxy centered around?

A

The galactic bulge and suppermasive black hole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Star phase life cycle:

A
  1. Huge clouds of dust and gas collapse by gravitational force and create a protostar
  2. The young stars continue to collapse
  3. Stars expand as they grow older
  4. When core runs out of hydrogen & helium the stars become less bright
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What will happen to the sun?

A

In about 5 billion years, the sun will expand & the core will run it if hydrogen and helium & it will become less bright & later become a red giant star

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Order of the planets

A

Sun, Mercury, Venus, earth, Mars, (asteroid belt) Jupiter, Saturn, Uranus, Neptune, (asteroid belt)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why is Uranus and it’s likes special?

A

It’s special bc the axis rotation is tilted sideways, so it’s north and south likes lie where most other planets have their Equators.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Pluto is considered a dwarf planet and not an actually planet bc..

A

it is too small and there are other objects orbiting the wary that are the same size, so if Pluto was considered a planet, they would be too.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Layers of the sun:

A

Inner core, radiative zone, convection zone, photosphere, chromosphere, corona (“haze”)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Core:

A

High pressure temp & high reactions occur

17
Q

Radiative zone:

A

A very dense layer . Radiation including light is absorbed and re - admitted

18
Q

Convection zone:

A

There is constant circulation of plasma from hot to cooler regions

19
Q

Photosphere:

A

The yellow part of the sun that can be seen

20
Q

Chromosphere:

A

The red coloured layer that can only be seen during a solar eclipse

21
Q

Corona “haze”:

A

Hot outer layer about 1 million degrees

22
Q

Nuclear fusion:

A

The process that fuels or sun. Allows it to give off energy calls nuclear fusion. To atomic buckle dude together to create a larger nucleus and release energy in nuclear fusion

23
Q

What does the sun burn on?

A

Hydrogen and helium

24
Q

Rotation:

A

The planets individual spinning around an internal axis

25
Q

Revolution:

A

All the planets moving around the sun.

26
Q

Lunar eclipse:

A

An eclipse where the moon appears darker as it passes into earths shadow

27
Q

Solar eclipse:

A

A type of eclipse when the moon passes between the sun and the earth and the moon blocks the sun. (new moon only)

28
Q

Difference between low orbiting and high orbiting satellite

A

A low orbiting satellite orbits around the earth between 160 and 2000 km while a high orbiting satellite and the high orbiting one orbits above earth

29
Q

What are craters?

A

Craters are cavities usually found in the moon or earth

30
Q

How are craters caused?

A

By the impact of a meteoroid

31
Q

What is a meteor?

A

A tail of light that appears in the night sky when a meteorite enters the atmosphere

32
Q

What is a meterorite?

A

A piece of rock that enters the earths atmosphere from space..

33
Q

Why are there more meteors recorded than meteorites?

A

?

34
Q

Why does the moon have more craters than the earth?

A

Because earth has an atmosphere which causes asteroids to burn up before they reach the surface. Therefore the moon does not.

35
Q

What effects does space travel have on human bodies

A

Space sickness, weightlessness, muscular atrophy, body fluid imbalance

36
Q

The Big Bang:

A

The rapid expansion of matter that according to theories marked the origin of the universe

37
Q

Some evidence of the Big Bang

A

The universe is expanding, the abundance of different elements in the universe and the “cosmic microwave”

Science grade 9 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions