| Question | Answer |
|---|
| What main type of rock is formed when liquid rock cools down and hardens? | |
| What is the name for liquid rock below the Earth's surface? | |
| What is is called when rocks are broken down into tiny bits? | |
| What is the name for the layer of the Earth that casues the tectonic plates to move? | |
| Name one period in the Paleozoic Era other than Ordovician. | |
| Other than sediment, name two of the other three components of healthy soil. | |
| What is the name for rocks that allow water and air to pass through easily? | |
| What is the decayed or broken down organic matter in the soil called? | |
| What type of rock can scientist use to measure its absolute age? | |
| What do you call the breaking up of rocks due to a physical change? | |
| How do scientists determine the absolute age of a rock? | |
| What is true of the habitat of nearly all of the animal fossils one might find in the Ordovician limestone? | |
| What guideline do scientists use to say that older rocks are lower? | |
| What is true of the body structure of nearly all of the animal fossils one might find in the Ordovician limestone? | |
| What do you call a fossil that indicates the activities of a long-dead organism? | |
| What is the name of the process of oxygen combining with metal in the presence of water, generally? | |
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