Earth Habitable Zone
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
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
What holds the planets in orbit around the Sun?
A) Wind
B) Sunlight
C) Gravity
D) Ice
C) Gravity
What does the HR Diagram show about stars?
A. Their names
B. Their distance from Earth
C. Their temperature and brightness
D. Their moons
C. Their temperature and brightness ✅
What is it called when gravity and fusion are balanced?
A. Explosion
B. Collision
C. Equilibrium
D. Confusion
C. Equilibrium
Which planet is also in the Sun’s habitable zone?
A) Venus
B) Mars
C) Jupiter
D) Mercury
B) Mars
What do stars begin as?
A. Dust and gas clouds
B. Planets
C. Meteors
D. Comets
A. Dust and gas clouds
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
Where are the hottest stars on the HR Diagram?
A. Top right
B. Bottom right
C. Bottom left
D. Top left
D. Top left ✅
What is a black hole?
A. A hole in the ground
B. A place where gravity is very strong
C. A tunnel to the Moon
D. A giant planet
B. A place where gravity is very strong ✅
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
What is the longest stage of a star’s life?
A. Red giant
B. White dwarf
C. Main sequence
D. Nebula
C. Main sequence
Which gas traps heat in Earth’s atmosphere?
A) Oxygen
B) Carbon dioxide
C) Helium
D) Nitrogen
B) Carbon dioxide
Where are red giants found on the HR Diagram?
A. Top left
B. Bottom left
C. Top right
D. Center
C. Top right ✅
What is the “habitable zone”?
A. Where stars are born
B. A place with no gravity
C. The area around a star where life might exist
D. The middle of a black hole
C. The area around a star where life might exist ✅
Which two elements are found most in the Sun?
A. Hydrogen and helium
B. Oxygen and carbon
C. Water and salt
D. Iron and nickel
A. Hydrogen and helium ✅
What does a large star become at the end of its life?
A. Planet
B. Black hole
C. Asteroid
D. Moon
B. Black hole ✅
What is one effect of climate change?
A) More sunshine
B) Less gravity
C) Melting ice caps
D) More stars
C) Melting ice caps
What force pulls the star’s material inward?
A. Fusion
B. Electricity
C. Gravity
D. Magnetism
C. Gravity ✅
What does Earth’s atmosphere do?
A. Makes rocks
B. Destroys light
C. Protects us from harmful radiation
D. Cools down the Sun
C. Protects us from harmful radiation ✅
What kind of star is our Sun?
A) White dwarf
B) Main sequence
C) Neutron star
D) Super giant
B) Main sequence
What is the Crab Nebula?
A. A type of crab
B. A planet
C. A supernova remnant
D. A comet
C. A supernova remnant ✅
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
What force pushes outward in a star?
A. Friction
B. Fusion
C. Rotation
D. Gravity
B. Fusion
What does a star’s light spectrum tell us?
A. How fast it moves
B. What it’s made of
C. How big it is
D. If it's a planet
B. What it’s made of ✅