1. True or False - There are seasons on Earth because the Earth is closer to the Sun in July and farther from the Sun in January.
2. True or False - A mineral is a naturally formed crystalline solid composed of an ordered array of atoms and having a specific chemical composition.
3. Boundaries between air masses are referred to as _____________.

• climate
• magma
• sedimentaries
• fronts
• mantle

4. True or False S-waves travel more rapidly through Earth's crust than P-waves.

5. If the Earth's axis wasmore tilted than it is today, the seasons would become (More or Less ) extreme. If the axis wasless tilted than it is today, the seasons would become (more or less) extreme.

6. The most abundant element that you breathe is

• oxygen
• nitrogen
• krypton
• carbon

7. Most severe tornadoes are produced by a severe thunderstorm referred to as a

• Stratocaster
• Supercel
• ordinary cell
• Multicell

8. Which isthicker? Earth's continental crust or oceanic crust?

9. Which of the following can be formed from previously existing rocks? [Choose all that apply]

• Igneous rocks
• sedimentary rocks
• metamorphic rocks