Reference no: EM132933986

1.Decide whether each statement is true (T) or false (F). Place your answer in the blank space given.

a. Fossils provide information about past environmental conditions.

b. Organisms that became Alberta's petroleum thrived during the Devonian Period.

c. The larger the speed difference of a seismic wave traveling through materials of different densities, the smaller the wave's reflection.

d. Many geologists believe liquid petroleum formed from microscopic marine organisms. 

2.Decide whether each statement is true (T) or false (F). Place your answer in the blank space given.

1. During subduction, the continental crustal plate is forced beneath the oceanic crustal plate.
2. Pangaea is the name for the supercontinent that geologists believe existed about 250 million years ago.
3. The rate of sea-floor spreading is balanced by the rate of sea-floor subduction.
4. A ridge is formed where the flow of two convection cells is toward Earth's interior. 

3.Decide whether each statement is true (T) or false (F). Place your answer in the blank space given.

1. The Bearspaw Sea had retreated by the beginning of the Cenozoic Era.
2. The presence of calcium carbonate in Alberta soils is an indication that Alberta was once submerged by a marine environment.
3. Large-brained primates originated during the Cretaceous Period.
4. North America may have cooled during the Tertiary Period because the North American landmass moved north during this time. 

5.Variations in Earth's orbit, the tilt of the axis of rotation, and the wobble of the axis of rotation over Earth's geological history are believed to

1. cause warm periods
2. cause cold periods
3. control the timing of glaciation periods
4. be the sole cause of glaciation periods

6.Which statement about CO2 levels and average global temperatures over Earth's history corresponds to the geological evidence?

1. The CO2 level increases and the average global temperature increases.
2. The CO2 level increases and the average global temperature decreases.
3. The CO2 level decreases and the average global temperature increases.
4. The CO2 level and the average global temperature both stay the same.