Missed J-Lab Questions

What is the fewest number of seismographic stations that must record the arrival time of P and S waves in order for the epicenter of an earthquake to be located?

• 2

• 3

• 5

• 10

The graph shows the decay of radioactive isotopes. What approximate amount of the element remains after 3 half-lives have elapsed?

• 50.0%

• 25.0%

• 12.5%

• 6.25%

The diagram above is similar to one drawn by Antonio Snider-Pellegrini in 1858. What data was he trying to explain with this diagram?

• The distance between the Eastern and Western Hemispheres

• The reason for similar fossils in Africa and South America

• The presence of earthquakes on different continents

• The variations in depths of the Atlantic Ocean

What is usually responsible for an earthquake?

• Pressure buildup in the mantle

• Slippage along faults within the Earth's crust

• Weathering along coastlines

• Force changes from the Moon pulling on Earth

Only 3% of Earth’s water is fresh water. The world’s oceans contain the rest of the Earth’s water. Of that 3%, three-fourths is tied up in glaciers, ice caps, and snow fields. Antarctic glaciers contain nearly 85% of all the ice in the world, and floating sea ice in the Arctic contains 10% of the ice. Sea ice freezes from ocean water, but the salt is excluded from the freezing process, resulting in mostly freshwater ice. Where is the remaining 5% of the world’s permanent supply of ice and snow?

• High mountain peaks

• Permanent Arctic blizzards

• Floating icebergs

• Drifting Antarctic snow

What profile best represents the contour map along the line AB?

• A

• B

• C

• D

Why does water move more slowly through clay than humus?

• Clay has greater permeability

• Clay has very small pore spaces

• Clay prevents capillary attraction of water

• Clay reduces evaporation rates

Which of the following landforms is most likely to result when two continents collide?

• Mountain range

• Valley

• Plateau

• Plain

The map shows the ages of the exposed bedrock in Virginia. Which city sits on exposed bedrock that is the same age as the rock in Bristol?

• Deel

• Harrisonburg

• Charlottesville

• Norfolk

Which of the following can result when underground water is heated by hot igneous rock?

• Metamorphism

• Geysers

• Salt domes

• Karst topography