Grade 9 Astronomy Test
5.0(1)
Learn
Practice Test
Spaced Repetition
Match
FlashcardsCard Sorting
1/30
There's no tags or description
Looks like no tags are added yet.
Study Analytics
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
31 Terms
1
New cards
Hottest planet
Venus
2
New cards
Largest planet
Jupiter
3
New cards
Smallest planet
Mercury
4
New cards
Planet with thin carbon dioxide atmosphere
Mars
5
New cards
Planet with visible rings
Saturn
6
New cards
Solar eclipse
Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
7
New cards
Lunar eclipse
Occurs at a full moon when Earth is directly between the moon and the sun
8
New cards
What causes high tides?
* The gravity of the moon pulls the water towards it, causing a bulge or a rise in the sea level, which results in high tide
* This occurs on two sides of the earth
* This occurs on two sides of the earth
9
New cards
What causes low tides?
* In contrast to high tides, the parts of the Earth's oceans that are furthest away from the moon experience a weaker pull due to water receding and going to a high tide
* This results in the sea level dropping, which causes a low tide.
* This results in the sea level dropping, which causes a low tide.
10
New cards
Rocky Planets (in order)
Mercury, Venus, Earth, Mars
11
New cards
Gaseous Planets (in order)
Jupiter, Saturn, Uranus, Neptune
12
New cards
Meteoroid
A chunk of rock or dust in space
13
New cards
Meteor
A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
14
New cards
Meteorite
A meteoroid that passes through the atmosphere and hits Earth's surface.
15
New cards
What is the sun made of?
75% hydrogen and 25% helium
16
New cards
Solar flare
A sudden eruption of intense high-energy radiation from the sun's surface
17
New cards
Sunspot
A cooler darker spot appearing every 11 years on the sun's photosphere
18
New cards
Aurora
An atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force
19
New cards
How do seasons occur?
* Caused by the tilt of Earth's axis
* If the axis is tilted away from the Sun, that hemisphere is in the winter, because it is receiving less direct sunlight
* If the axis is tilted towards the sun that hemisphere is in summer and is receiving direct sunlight
* If the axis is tilted away from the Sun, that hemisphere is in the winter, because it is receiving less direct sunlight
* If the axis is tilted towards the sun that hemisphere is in summer and is receiving direct sunlight
20
New cards
Comets
Balls of ice, rock, and dust in space with a tail
21
New cards
Why do comets have tails?
When they come to the inner part of the solar system, the sun vaporizes some of them leaving behind a tail.
22
New cards
What is an asteroid?
A rock orbiting the Sun that was left over when the planets formed.
23
New cards
Where is the asteroid belt located?
Between Jupiter and Mars
24
New cards
What is the heliocentric model?
The sun is the center of the solar system
25
New cards
Earth's rotation period
24 hours
26
New cards
Earth's revolution period
365 days
27
New cards
Big Bang Theory
The theory that the universe originated from an infinitely small and infinitely hot mass in a huge explosion that released all matter and energy.
28
New cards
Solar Nebula Theory
The theory that describes how stars and planets form from contracting, spinning disks of gas and dust
29
New cards
Light years
The distance light travels in a year
30
New cards
What are constellations?
Groups of stars that make an apparent pattern in the sky.
31
New cards
What are ways to classify stars?
* Temperature
* Colour
* Luminosity
* Mass
* Radius
* Colour
* Luminosity
* Mass
* Radius