quiz #1 astronomy

Question 1

the smallest planet?

Answer 1

mercury

Question 2

biggest planet

Answer 2

Jupiter

Question 3

• has the smallest diameter

- has no atmosphere

Answer 3

Mercury

Question 4

• planet with 2 moons

- has iron oxides in its surface material

Answer 4

Mars

Question 5

• the hottest planet
• closest in mass to the Earth
• CO2 in atmosphere causes a runaway Greenhouse Effect
• ofter called “ Earth’s Twin”

Answer 5

Venus

Question 6

• only planet known to have life on it

- has one moon

Answer 6

Earth

Question 7

• takes just under 10 hours to rotate on its axis
• has the largest gravity
• has a giant Red Spot
• planet with 3 rings

Answer 7

Jupiter

Question 8

• furthest planet from the sun
• take almost 165 years to orbit the sun
• coldest temperature recorded on this planet’s moon of Triton
• coldest recorded temperature

Answer 8

Neptune

Question 9

• axis is horizontal; rotates like a rolling ball

- gas planet that appears blue in colour

Answer 9

Uranus

Question 10

outer planets and another word for outer planet

Answer 10

jupiter,saturn,uranus,neptune

outer planets are also called gas giants

Question 11

• the least dense planet

- planet with 1000 rings

Answer 11

Saturn

Question 12

inner planets and also another name for inner planets

Answer 12

mercury,venus,earth, mars

inner planets is another word for terrestrial

Question 13

the sun together with the eight planets and other celestial bodies that orbit the sun

Answer 13

solar system

Question 14

a celestial object that orbits one or more stars and it is capable of forming into a spherical shape

Answer 14

planet

Question 15

A natural satellite of a planet that is reflected by light from the sun

Answer 15

moon

Question 16

a large chunk of rock that orbits the sun

Answer 16

asteroid

Question 17

comet are made up of rocks,dust and ice. Travels in long,cigar-shaped path around the sun.
-small head, long tail
tail always faces away from the sun

Answer 17

comet

Question 18

a natural body that revolves around a planet; a moon

Answer 18

satellite

Question 19

the inner planets closest to the sun that are made up of rocks and metals with a hard surface making them different from other planets that doesn’t have a solid surface

Answer 19

terrestrial planets

Question 20

planets whose lies within the asteriods

Answer 20

inner planets

Question 21

planets whose orbit lies outside the asteroid belt

Answer 21

outer planets

Question 22

how long it takes for a planet to revolve once around the sun

Answer 22

orbital period

Question 23

Astronomical unit (AU) definition

Answer 23

a unit that measures the planet’s distance from the sun

149.6= 1 AU

Question 24

list planets in order

Answer 24

Mercury 
Venus
Earth
Mars
Jupiter 
Saturn
Uranus 
Neptune

Question 25

Compare inner and outer planets
Atmosphere;
surface;
moon;
size;
orbit;
ring;
temperature;

Answer 25

Inner planets and outer planets

Atmosphere;
Inner planets: CO2,O2, N2
Outer planets : CH4, H2, He

Surface;
Inner planets: terrestrial(rocky)- dense
Outer planets: gaseous -not dense (atmosphere only)

Moons;
Inner planets: few or none
Outer planets: many moons

Size;
Inner planets: small
Outer planets: very large

Orbit;
Inner planets: 1 year or less
Outer planets: 11 years or more

Rings;
Inner planets: no rings
Outer planets: have rings

Temperature:
Inner planets: hot to cool/cold
Outer planets: extremely cold

Question 26

Why is Venus the hottest planet in the solar system?

Answer 26

Venus has a very thick atmosphere of CO2, which allows heat to enter but not leave (greenhouse effect) and it is also second planet from the sun

Question 27

Why isn’t mercury the hottest planet?

Answer 27

Mercury does nor have an atmosphere which means it has no greenhouse effect. Even though Mercury is much closer to the Sun, most of the heat goes back out into space.