Earth Habitable Zone
Life cycle of stars
Climate Change
mix
solar system
100

Why is Earth in the "habitable zone"?
A) It's the biggest planet
B) It's too close to the Sun
C) It's the right temperature for liquid water
D) It has many moons

C) It's the right temperature for liquid water

100

What happens when a big star dies?
A) It gets colder
B) It turns into a comet
C) It explodes in a supernova
D) It becomes a moon

C) It explodes in a supernova

100

What holds the planets in orbit around the Sun?
A) Wind
B) Sunlight
C) Gravity
D) Ice

C) Gravity

100

What is an exoplanet?
A) A moon of Earth
B) A planet outside our solar system
C) A star
D) A type of comet

B) A planet outside our solar system

100

Why do we stay on the ground on Earth?
A) The Sun pulls us
B) Earth’s gravity pulls us down
C) The Moon helps us
D) We are magnetic

B) Earth’s gravity pulls us down

200

Which planet is also in the Sun’s habitable zone?
A) Venus
B) Mars
C) Jupiter
D) Mercury

B) Mars

200

Which of these stars is the hottest?
A) Red star
B) Yellow star
C) Blue star
D) White dwarf

C) Blue star

200

What causes climate change?
A) Too many clouds
B) Cars and factories release greenhouse gases
C) Volcanoes stop working
D) More rainstorms

B) Cars and factories release greenhouse gases

200

How do scientists find exoplanets?
A) By flying to them
B) By watching them move in front of stars
C) By using submarines
D) By building them

B) By watching them move in front of stars

200

What does Earth’s atmosphere do?
A) Makes stars shine
B) Keeps out sunlight
C) Protects us and holds air to breathe
D) Gives us gravity

C) Protects us and holds air to breathe

300

What does the "habitable zone" mean?
A) A place where it rains
B) A place with only gas
C) A place where life can exist
D) A place with lots of stars

C) A place where life can exist

300

Which planet is closest to the Sun?
A) Venus
B) Mars
C) Mercury
D) Earth

C) Mercury

300

Which gas traps heat in Earth’s atmosphere?
A) Oxygen
B) Carbon dioxide
C) Helium
D) Nitrogen

B) Carbon dioxide

300

Why are exoplanets interesting to scientists?
A) They can melt
B) They are always huge
C) Some might have life
D) They are close to the Moon

C) Some might have life

300

Which layer of Earth’s atmosphere helps block UV rays?
A) Troposphere
B) Mesosphere
C) Ozone layer
D) Crust

C) Ozone layer

400

What is the first stage of a star’s life?
A) White dwarf
B) Main sequence
C) Protostar
D) Supernova

Protostar

400

Which two planets are gas giants?
A) Earth and Mars
B) Jupiter and Saturn
C) Venus and Mercury
D) Neptune and Mars

B) Jupiter and Saturn

400

What is one effect of climate change?
A) More sunshine
B) Less gravity
C) Melting ice caps
D) More stars

C) Melting ice caps

400

What is gravity?
A) A force that pushes things away
B) A force that makes things float
C) A force that pulls things together
D) A kind of light

C) A force that pulls things together

400

 What gas do we need to breathe?
A) Carbon dioxide
B) Hydrogen
C) Nitrogen
D) Oxygen 

D) Oxygen

500

What kind of star is our Sun?
A) White dwarf
B) Main sequence
C) Neutron star
D) Super giant

B) Main sequence

500

Why is Pluto no longer called a major planet?
A) It's too hot
B) It has no gravity
C) It is too small and doesn’t clear its orbit
D) It is made of gas

C) It is too small and doesn’t clear its orbit

500

How can we help stop climate change?
A) Burn more coal
B) Plant more trees
C) Use more plastic
D) Drive more cars

B) Plant more trees

500

Which planet has the most gravity?
A) Earth
B) Venus
C) Jupiter
D) Mars

C) Jupiter

500

What is the electromagnetic spectrum?
A) A list of star names
B) A way to measure planets
C) A range of light waves, including visible and invisible
D) A tool for measuring earthquakes

C) A range of light waves, including visible and invisible

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