Brainscape's Knowledge GenomeTM

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


See full index

Science 9 > Chapter 3 Astronomy Pt. 2 > Flashcards

Chapter 3 Astronomy Pt. 2 Flashcards

0
Q

What are the terrestrial planets?

A

Mercury, Venus, Earth and Mars.

  • All have a high density, solid surface, high iron concentration
  • slower rotating and faster revolving
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

Sun

A
  • everything revolves around the sun because it has so much gravity
  • nothing crashes into the sun because of rotation of other planets
  • sun is a low mass star
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Mercury

A 
Smallest planet
Closest to the sun
Revolution of 88 of our days 
Rotation is 59 of our days
No atmosphere 
No moons 
Really hot daytime temps-450
Really cold nighttime temps-180
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Venus

A

Similar to earths size, extremely thick atmosphere, lots of active volcanoes, surface is hot and is getting hotter( due to extreme greenhouse gasses), 480 degrees, extreme acid rain is atmosphere

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

Earth

A
  • Only one with confirmed life

- h2o in all three states( solid, liquid and gas)

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

Mars

A

Referred to as the red planet, most like earth and most likely to travel to(0- -90 degrees), has an atmosphere but it’s thinner then ours and main CO2, has H2o in solid form(ice), gas polar caps, has a massive ravine(canyon) that cuts its surface
-approximately 1/3 the gravity of earth

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

Gas Giants

A

Jupiter
Saturn
Uranus
Neptune

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

Uranus

A
  • Mainly hydrogen and helium but also Methane
  • rotates in a different axis and in the opposite direction
  • forms an irregular magnetic field
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Neptune

A
  • guessed to exist before we saw it
  • bigger than Uranus
  • high in methane
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Asteroids

A
  • rocky, metallic chunks that revolve around the sun
  • not large enough to be planets
  • asteroid belt between Mars and Jupiter
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Meteor

A

Any space debris that is sucked into earths gravitational pull

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Meteorite

A

Any object that actually hits the earth

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

Comets (dirty snowballs)

A
  • composed of various things (methane H2O, metal, ammonia)

- will appear in night sky as a fire ball with a long trail

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

Moons

A
  • mercury and Venus have no moons
  • the moon is essential to our survival
  • moon caused tides
  • Jupiter has most moons
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Pluto

A
  • doesn’t hold it’s own orbit

- crosses Neptunes path every 15 yrs

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

Kuiper’s belt

A

Disc shaped area with a collection of thousands of icy bodies

16
Q

Oort Cloud

A

The most outer region of the solar system

17
Q

Measuring distance in solar system

A
  • We use AU

- 1 AU is 150 million km

18
Q

Jupiter

A
  • Largest planet
  • Has the most moons
  • temperature is very cold(-150 degrees)
19
Q

Gas giants

A
  • Jupiter Saturn Uranus Neptune
  • slow revolving, fast rotation
  • less dense
20
Q

Saturn

A
  • second larger planet
  • has the second greatest amount of moons
  • has distinctive rings causes by moon collision
  • temp -180
21
Q

Uranus

A
  • Spins on its side on a different axis

- forms an irregular magnetic field

22
Q

Stars

A
  • Masses of hydrogen and helium undergoing nuclear fusion and emitting energy
  • surface temp from a star can be determined by the colours we see from spectroscope
23
Q

Galaxies

A
  • clumps of billions of stars and planets
  • our galaxy is named the Milky Way
  • shaped as a double spiral
  • barrel shaped, elliptical shaped, irregular shaped
24
Q

Apparent magnitude

A

Star brightness and size as it appears to the naked eye

25
Q

Absolute magnitude

A

Actual size of brightness of a star

Our sun has a low absolute magnitude (4) but it’s apparent magnitude is (1)

26
Q

Universe

A

-everything, all time, all space, all dimensions.

27
Q

Cosmology

A

Is the study of how the universe began and how it is always changing

28
Q

The Big Bang theory

A
  • states that the universe began 13.7 billion years ago because of an outward explosion
  • formed stars planets and other solar bodies
29
Q

Evidence supporting Big Bang

A

-all things in space is spinning so they probably originated from an explosion.

30
Q

Doppler affect

A

Objects in motion emit energy differently than objects that are still.

31
Q

Solar flares and solar prominences

A

-Rapid discharges of charged gases or particles

  • flares shoot directly from the sun into space
  • prominences shoot back to the suns surface
36
Q

What is the definition of the Universe?

A

Everything in space; all galaxies and time

37
Q

What is the Big Bang Theory?

A

States that the world began with a massive outwards explosion.

38
Q

What proof do we have to support the Big Bang Theory?

A
  • Everything is spinning

- The Doppler Effect

39
Q

What did Ury and Miller do?

A

They tried to make life from non living.

Science 9 (7 decks)

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