Assessment #3 in Earth and Life Science

Which statement correctly describes the law of superposition?

• Sediments are always deposited horizontally.

• Rock layers that are not interrupted are conformable.

• A layer that cuts another is younger than the layer it cuts across.

• In an undeformed sequence of layers, the top layer is the youngest.

What was the great supercontinent called?

• Gondwanaland

• Laurasia

• Pangaea

• Panthalassa

Which period is known as the "era or recent life"?

• Cenozoic

• Mesozoic

• Permian

• Silurian

Which statement properly describes the plate tectonics theory?

• Continents move above the ocean floor.

• Ocean waters seep through the continents breaking them apart.

• Volcanic eruptions strongly jostle the ground, causing the continents to separate.

• Fragments of lithosphere carry the continents and ocean basins as they move above the asthenosphere.

Which statement supports Alfred Wegener's geographical evidence of the continental drift theory?

• Similar fossils of plants and animals found at different continents separated by oceans.

• Presence of large tropical swamps with abundant vegetation found in the Northern Hemisphere.

• Glacial period occurrence during the late Paleozoic era in South Africa, South America and Australia, and India.

• Jigsaw puzzle fit of the current continents where the coastlines of South America and Africa seem to fit together.

Which statement correctly describes cross-cutting relationship?

• Sediments are always deposited horizontally.

• Rock layers that are not interrupted are conformable.

• A layer that cuts another is younger than the layer it cuts across.

• In an undeformed sequence of layers, the top layer is the youngest.

This idea shows that the ocean floor splits along the ridge and that is where magma rises to form new ocean floor.

• Theory of plate tectonics

• Continental drift theory

• Seafloor spreading

• Continental crust spreading hypothesis

Before ocean basis evolved to what and how they are today, a giant water body or superocean has once formed. What is the name used to pertain to this superocean?

• Gondwanaland

• Laurasia

• Pangaea

• Panthalassa

In the division of the geologic time scale, which represents the longest amount of time?

• Eon

• Epoch

• Era

• Period

The strata of a sedimentary rock that shows that sediments are deposited horizontally follows a principle of relative dating known as ________.

• Unconformities

• Law of superposition

• Principle of original horizontality

• Principle of cross-cutting relationships