1. Describe the difference between relative dating and absolute dating?
2. The half-life of potassium-40 is thought to be 1.3 billion years. An igneous rock is found with
25% potassium-40. What is the absolute age of this rock?
3. What element is used in the radioactive dating of dead organisms and what is its half-life?
4. Describe an index fossil and how it benefits scientists who study Earth history?
5. List the three subatomic particles found in an atom, their location, and their charges.
6. What is the difference between physical vs. chemical change? What are the 3 states of
matter?
7. Explain the difference between the columns and rows on the Periodic Table:
names/similarities
8. List some characteristics of metals, nonmetals, and metalloids. Where are they located on PT?
9. What is a compound? Explain how can it be separated.
10. Pure substances can be elements or compounds. How is a mixture different? Describe 2 types.
11. Describe the three ways to separate mixtures?
12. Explain the Law of Conservation of Mass and balancing chemical equations.
13. Describe the difference between a nonrenewable energy resource and a renewable energy
source.
14. Explain FIVE different renewable energy resources and how they work.
15. Define what it means to be a good steward and why it is important.
16. Describe the differences between prokaryotic and eukaryotic cells.
17. What are two “things” that plant cells have that animals cells do not have?
18. Describe the two different ways cells can reproduce.
19. What is photosynthesis and how is it different from cellular respiration?
20. List 6 different indicators that help us determine water quality and explain how each affects it.