Unit 4 Test

Which of the following best describes where the youngest and oldest crustal rocks can be found on the Earth?

• The oldest crustal rocks are found high in the mountains and the youngest at sea level.
• The oldest crustal rocks are found at the edges of continents and the youngest in the center.
• The oldest crustal rocks are found on continents and the youngest on the ocean floor.
• The oldest crustal rocks are found at the North and South Pole and the youngest at the equator.

The type radioactive decay that consists of two protons and two neutrons leaving the nucleus is

• alpha
• beta
• gamma

Not all the crustal rock found on the earth is the same age. Some of it is younger than 200 million years old, while other crustal rock can be as old as 4 billion years. Which Earth processes are most responsible for the difference in ages?

• Weathering and erosion by moving wind, water, and ice
• Changes that rocks experience when exposed to heat and pressure
• The different rates at which molten minerals cool and form crystals
• Destruction and renewal of rock at tectonic plate boundaries

Carbon-14 dating is method of absolute dating that can only be used on

• minerals
• organic matter/ used to be alive
• rocks
• water

Layers of rock and fossil evidence help scientists

• account for all of the species that have ever existed.
• determine the exact age of Earth.
• organize events in Earth’s geologic history.
• list every event that has ever happened on the Earth’s surface.

Scientists use radiometric dating (radioactive decay) to measure

• the relative age of rocks
• the absolute age of rocks
• the number of fossils in rocks
• Time

True or False. Some types of meteorites are important in dating the earth because they have never been melted or reformed since they were made.

• True
• False

According to the law of superposition, the oldest fossils are found

• In layer A
• Between layer A and B
• In layer B
• In layer c

Which of the following choices is the oldest?

• Layer L
• Intrusion H
• Intrusion D
• Layer E

By saying: "I am older than my sister," is an example of which type of dating used in geology:

• Relative Age/Dating
• Chronological Sibling Timelies
• Absolute Age/Dating
• Fossil Age/Dating