🌍 Earth’s History
What do scientists use to organize Earth’s history?
The geologic time scale
What is a fossil?
Preserved remains or traces of organisms
What natural hazard involves shaking of the ground?
Earthquake
What is a natural resource?
Materials from Earth used by humans
What is the theory that explains movement of Earth’s plates?
Plate tectonics
What type of dating places events in order without exact dates?
Relative dating
What type of fossil is used to determine age of rock layers?
Index fossils
What scale measures earthquake strength?
Richter scale or Seismograph
Give one renewable resource
Solar or wind or water or biomass
What type of boundary occurs when plates move apart?
Divergent boundary
What type of dating gives the exact age of rocks?
Absolute dating
What law states older layers are found below younger layers?
Law of Superposition
What natural hazard forms over warm ocean water?
Hurricane
Give one nonrenewable resource
Coal or oil or natural gas or fossil fuel
What type of boundary occurs when plates collide?
Convergent boundary
What major event caused the extinction of dinosaurs?
Asteroid/Meteorite impact
What kind of rock usually contains fossils?
Sedimentary rock
What type of boundary causes most earthquakes?
Transform Plate Boundary
Why are fossil fuels considered nonrenewable?
They take millions of years to form
How does seafloor spreading support plate movement?
New crust forms at mid-ocean ridges
How do scientists use index fossils and rock layers together to determine the relative age of Earth’s history?
By comparing fossils found in rock layers, scientists can match layers of the same age and determine which are older or younger
What does it mean if two rock layers have the same fossils?
They are the same age
What natural hazard is caused by sudden movement of rock downhill?
Landslide
Why should we reduce use of nonrenewable resources?
They can run out or environmental impact
Analyze how plate movement shapes Earth’s surface over time
Forms mountains, volcanoes, earthquakes, reshapes continents