Earth Systems Review Wednesday, January 16, 2013

1. The diagram shows layers of sedimentary rock. In which layer should a scientist find the oldest fossils? a. Siltstone b. Limestone c. Sandstone d. conglomerate

2. Which change takes the longest to occur? a. Weathering of rocks to make soil b. Hatching an egg to become a bird c. Sprouting of a seed to become a plant d. Evaporation of a puddle to make water vapor

3. Every year, water fills a small lake in a dry region. After a few weeks, the lake evaporates, leaving behind a thin layer of crystals that form from minerals dissolved in the lake water. Each year, a new layer is added. What type of rock is MOST LIKELY to be formed by this process? a. Volcanic b. Sedimentary c. Igneous d. Metamorphic

4. Students visit an island. The island beach is covered with many small pebbles. The beach gets strong ocean waves. After thousands of years, the pebbles on the beach will MOST LIKELY be- a. Pushed into a pile in the middle of the island b. Broken down into smaller pieces c. Larger and a different color d. Pressed together to form one large rock

Which layer of sedimentary rock is the youngest? ABCDABCD