1. One of the topics we didn't cover as well was the parts of the universe We really need to master these objectives to do well on the MCT2, so we will be reviewing them today!!!

2. Asteroids are small rocks that orbit the sun They don't have to be round

3. Moons are medium-sized round rocks They orbit planets

4. Planets are large round rocks that orbit the sun

5. Stars are huge balls of burning gas The sun is the star in our solar system Usually solar systems only have one star.

6. Let's practice... 1) Which bodies orbit the sun? 2) Which bodies are medium sized rocks that orbit planets? 3) Which bodies are made of burning gas?

7. Solar systems are made of groups of asteroids, planets, moons and a star

8. Billions and billions of solar systems make a galaxy Our galaxy is called the Milky Way

9. Billions and billions of galaxies make the universe

10. Let's practice.... 1) What is a solar system made of? 2) How many galaxies are there besides the Milky Way? 3) Order the following from biggest to smallest: Galaxy, Planet, Universe, Solar System.