SCI Week 20 Day 5

What layer of the Earth is described as "plastic and flowing"?

• asthenosphere

• atmosphere

• lithosphere

• troposphere

The image shows the rock cycle and the associated process leading to the formation of two kinds of rocks labeled rock 1 and rock 2. What are the types of rocks formed?

• Rock 1 is an intrusive igneous, and rock 2 is an extrusive sedimentary.

• Rock 1 is an extrusive igneous, and rock 2 is an intrusive sedimentary.

• Rock 1 is an intrusive sedimentary, and rock 2 is an extrusive sedimentary.

• Rock 1 is an intrusive igneous, and rock 2 is an extrusive igneous.

Which is true about the Earth's crust?

• It is uniform in thickness.

• It floats above a layer of hot magma.

• It consists mostly of iron and nickel.

• It has a higher density than the core.

Which event usually causes tsunamis?

• typhoon or hurricane

• undersea earthquake

• volcanic eruption

• rotation of the Earth

A geologist found fossils of clam shells in limestone while excavating in a desert. What can be inferred based upon her discovery?

• The area was once covered by shallow sea.

• The area once contained volcanic mountains.

• The desert had once received heavy rainfall.

• The ocean currents carried the shells to the desert.