Kahoot! Unit 7 Review

How many galaxies are in the universe?

• billions

• millions

• trillions

• thousands

The objects that compose our solar system vary in size. What is the largest object in our solar system?

• Earth

• Sun

• Earth's moon

• Pluto

A system of planets and other bodies that orbit a star.

• galaxy

• universe

• solar system

• planet

The sun is the center of our solar system. Which statement accurately describes the sun?

• It is a planet.

• It is a medium-sized star.

• It is one of Earth's moons.

• It's the largest planet in our solar system.

The sun is much larger than the moon. Why do the sun and moon appear to be the same size when viewed from Earth?

• The moon is much brighter than the sun.

• The moon is much bigger than the sun.

• The moon is much denser than the sun.

• The moon is much closer than the sun.

Which of the following is the SMALLEST?

• The Sun

• a planet

• blue supergiant star

• red giant star

Which of the following correctly lists the objects of space in order from largest to smallest?

• universe, galaxy, star, planet

• galaxy, star, planet, universe

• galaxy, star, universe, planet

• star, universe, galaxy, planet

Distances between objects in space can be enormous. Which of the following distances is the longest?

• 2.1 ly

• 93 million km

• 1 million ly

• 18, 950, 000 km

If a star is 7 ly from Earth, how long does it take light from that star to reach Earth?

• 7 min

• 7 ly

• 7 y

• 7 h

Which object is closest to Earth?

• Proxima Centauri

• Andromeda galaxy

• Sirius

• Planet Uranus