Science 7 Quarter 3 Review

Front

Mid-ocean ridges are the sites of intense _________ activity.

Back

Volcanic

Front

___________ is the process by which new oceanic lithosphere (sea floor) forms as magma rises to Earth’s surface and solidifies at a mid-ocean ridge.

Back

Sea-floor spreading

Front

Which type of boundary forms a mid-ocean ridge?

Back

divergent

Front

How does fossil evidence support Wegener's hypothesis of continental drift?

Back

Similar fossils are found along continental margins that appear to join together; Fossils are found in areas where the present-day climate could not have supported the organisms that made the fossils; Similar fossils of giant, land-dwelling dinosaurs are found on continents separated by oceans.

Front

Which fossil is relatively the oldest? Options: Trilobite, Ammonite, Crinoid, Gastropod

Back

Trilobite

Front

The age of a rock compared to the ages of other rocks is the rock's

Back

relative age

Front

Order the rock layers from oldest to youngest:

Back

5, 4, 3, 2, 1

Front

As you travel deeper DOWN into the Grand Canyon, the rocks get _____.

Back

older

Front

The __________of rocks is the numerical age and real age of rocks.

Back

absolute age

Front

Geologist use the time it takes for a radioactive isotope to decay to half its original mass called a___________.

Back

half-life