Astro

Owen and Emma are discussing astronomy. Owen asks, "What is a planetary system?"

• a cluster of planets

• planets that orbit a star

• a star that orbit a large planet

• a group of objects that orbit a planet

Colin and Emma are discussing the existence of dark matter in the universe. Colin believes that dark matter is real.

• True

• False

Mia and Griffin are observing a galaxy through a telescope. Mia wonders if a galaxy is always the same size.

• True

• False

David and Emma are learning about the solar system in their science class. They discover that Earth is part of a planetary system that includes our sun and seven other planets.

• True

• False

During a science class, Madison and Ayden were discussing the vastness of the universe. They wondered if the universe includes:

• all matter known to exist

• all the space that exists

• nearly 200 billion galaxies

• all the choices

Lorelei and her friends are discussing where Earth and the solar system are located. Which galaxy do they belong to?

• The Andromeda Galaxy

• The Whirlpool Galaxy

• The Milky Way Galaxy

• The Antennae Galaxy

Madison and Ricky are discussing the characteristics of a planet. Which three characteristics should they consider?

• It orbits a star

• Made of solid rock

• Its gravity is strong enough so that it is round

• It has cleared its orbital path around the star it revolves

During a school astronomy club meeting, David asked, "What type of galaxy does not have a distinct or regular shape? These galaxies are uncommon and make up about 25% of all galaxies in the universe."

• elliptical galaxy

• spiral galaxy

• irregular galaxy

• square galaxy

Isaac and Iris are discussing the characteristics of a planet. Which three characteristics would they agree on?

• It orbits a star

• Made of solid rock

• Its gravity is strong enough so that it is round

• It has cleared its orbital path around the star it revolves

Isaac and Sofie are observing the night sky through a telescope. They notice a galaxy that consists of a flat, rotating disk of stars, gas, and dust. What type of galaxy are they looking at?

• elliptical

• spiral

• irregular