Exploring Stars and Galaxies for Kids

How many galaxies do scientists believe could exist in the universe?

• 50 billion

• 100 billion

• 170 billion

• 200 billion

What is the main feature of spiral galaxies like the Milky Way?

• Their elliptical shape

• Their spiral shape

• Their random star orbits

• Their small size

What are stars primarily made of?

• Oxygen and nitrogen

• Hydrogen and helium

• Silicon and magnesium

• Carbon and iron

Tags

NGSS.HS-ESS1-1

What is the first stage in the life cycle of a star?

• White Dwarf

• Protostar

• Red Giant

• Supernova

What happens to a star when it runs out of hydrogen?

• It becomes a red giant

• It becomes a neutron star

• It becomes a black hole

• It explodes immediately

Tags

NGSS.HS-ESS1-1

What is the nearest star to Earth after the Sun?

• Sirius

• Alpha Centauri

• Proxima Centauri

• Betelgeuse

What color are the largest and brightest stars?

• Yellow

• Blue

• Red

• White

How many stars are estimated to be in the Milky Way galaxy?

• 400-600 billion

• 50-100 billion

• 100-200 billion

• 200-400 billion

What is the estimated number of stars in the universe?

• 200 sextillion

• 100 sextillion

• 70 sextillion

• 300 sextillion

What does the color of a star indicate?

• Its distance from Earth

• Its temperature

• Its size

• Its age

Tags

NGSS.HS-PS4-3