1) Many fossils are found in a region's different rock layers. This indicates that the region's ___________ has changed several times. a) water b) air c) environment 2) Which organism is still alive today but has also been found in fossilized form? a) fern b) Irish elk 3) _________________ of rock can show how an environment has changed over time. a) glaciers b) layers 4) Scientists can determine the age of a rock layer by studying the ___________ found in that layer. a) fossils b) glaciers 5) Rock layers have been disrupted, but we can use _______________ to tell when two layers are the same age. a) climate b) fossils 6) Rock layers can be disrupted when rock is worn away by _______________. a) erosion b) fossils 7) What are some limitations of using fossils to learn about past environments? (two correct answers) a) fossils are not common in many areas b) fossils do not show detail c) fossils are often missing pieces 8) What is a way we would know the type of environment has changed over time? a) no fossils in any layers of rock b) land and water fossils in two layers of rock near each other 9) If there are four rock layers, the layer at the bottom is most likely the ________________. a) oldest b) youngest 10) Which fossil type would suggest an area used to be an aquatic environment? a) fish fossil b) dinosaur fossil c) wolf fossil

Rock Layers & Fossils

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