Earth's Changes: Fossils, Plate Tectonics, & Superposition

What type of evidence do scientists use to learn about past climates and organisms?

• Fossils

• Meteor Showers

• Solar flares

• Radio Signals

Finding fossils of tropical plants in Antarctica suggest that:

• The rocks there are very young

• Fossils move by themselves over time

• Tropical plants can survive in any climate

• Antarctica once had a much warmer climate

According to the principle of superposition, in an undisturbed sequence of sedimentary rock layers:

• All layers are the same age

• Fossils cannot be used to determine age

• The oldest layers are at the bottom and the youngest layers are at the top

• The oldest layers are at the top and the youngest are at the bottom

If a dinosaur fossil is found above a layer containing ancient fish fossils, scientists conclude that:

• 1. The fish evolved from dinosaurs

• Dinosaurs appeared after those ancient fish

• Dinosaurs lived before the fish

• The layers were deposited at the same time
  

The most significant process that shapes Earth's surface is called?

• Superposition

• Plate tectonics

• Erosion by wind only

• Photosynthesis