Brainscape's Knowledge GenomeTM

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


See full index

Grade Nine - Science > Astronomy > Flashcards

Astronomy Flashcards

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

what are the three types of satellites?

A
  • low earth orbit satellites
  • medium earth orbit satellites
  • geostationary orbit satellites
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are low earth orbit satellites used for?

A
  • monitor icebergs
  • monitor agriculture
  • monitor the impact of natural disasters
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are medium earth orbit satellites used for?

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

what are geostationary orbit satellites used for?

A
  • communication

- weather

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

what’s the life cycle of a low-mass star?

A

at the end of their lives, the outer atmosphere is blown away. They then become white dwarves, which eventually cool to non-luminous bodies

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

what’s the life cycle of a high-mass star?

A

at the end of their lives, these stars explode (supernova). These stars collapse into a dense core, capable of sucking light towards it. These dense cores are called black holes

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

what is the order of planets closest to farthest from the sun?

A

mercury, venus, earth, mars, jupiter, saturn, uranus, neptune

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

what planet has the smallest diameter?

A

mercury

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

what planet has the largest diameter?

A

jupiter

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

what planet has the least gravity?

A

mercury

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

what planet has the most gravity?

A

jupiter

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

what planets have no moons?

A

mercury, venus

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

what plants have no atmosphere?

A

mercury

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

what planet has the hottest temperature?

A

venus

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

what planet has the biggest temperature range?

A

mercury

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

what are the layers of the sun?

A

core, radiative zone, convective zone, photosphere, chromospheres, corona

17
Q

what is the core of the sun?

A

centre of the sun where nuclear fusion occurs. The core averages a temperature of 15 million degrees celsius

18
Q

what is the radiative zone of the sun?

A

section of the sun that surrounds the core

19
Q

what is the convective zone?

A

section of the sun where hotter substances rise from the radiative zone and where cooler substances descend towards the radiative zone

20
Q

what is the photosphere?

A

section of the sun where light and other forms of radiation escape the sun. this section of the sun averages 5500 degrees celsius

21
Q

what is the chromosphere?

A

the inner atmosphere of the sun. it is 60,000 degrees celsius

22
Q

what is the corona?

A

the thin layer of the atmosphere. looks white and halo-like. extend millions of kilometres out into space

23
Q

what are the pros of travelling to mars?

A
  • research purposes
  • future home
  • curiosity (is there life on mars?)
24
Q

what are the cons of travelling to mars?

A
  • expensive
  • long time away from family
  • radiation exposure
  • hard on the body
25
Q

what is the definition of a planet?

A

a celestial body that is round in shape, dominates its orbit and orbits a star

26
Q

what is the definition of a dwarf planet?

A

a celestial body that meets most of the criteria of a planet: however it doesn’t dominate its orbit

27
Q

what is the definition of an asteroid?

A

a small celestial body made of rock and metal which orbits the sun

28
Q

what is the definition of an asteroid belt?

A

a collection of asteroids that orbit between mars and jupiter

29
Q

what is the definition of a meteoroid?

A

a small piece of rock or metal that is travelling through space

30
Q

what is the definition of a meteor?

A

a meteoroid as it enters our atmosphere

31
Q

what is the definition of a meteorite?

A

the remains of a meteor once it hits the surface of the earth

32
Q

what is the definition of a terrestrial planet?

A

a planet closer towards the sun, which is small and primarily made of rocky elements

33
Q

what is the definition of a gas giant?

A

a planet farther from the sun which is large and primarily made of gases (ex. hydrogen and helium)

34
Q

what is the definition of a solar eclipse?

A

when the moon blocks the suns light from reaching a certain part of earth

35
Q

what is the definition of a lunar eclipse?

A

when the earth blocks the suns light from reaching the moon

36
Q

what are the four effects that a microgravity environment can have on the human body?

A
  • can cause dizziness, disorientation and nausea
  • can cause blood to pool up in the upper body (puffy face look) which can lead to loss of water regulation and eventually dehydration
  • can cause blood cells to change shape which in turn affects their function
  • causes muscles and bones to weaken, causes the spinal column to expand by about 2-4 cm

Grade Nine - Science (7 decks)

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