Igneous rocks, Earth's Layers, & Continental Drift

What happens to pressure, density, and temperature as you get closer to Earth's core?

• they all increase

• they all decrease

• only pressure increases

What type of data do scientists use to infer characteristics about Earths interior?

• volcanic activity

• seismic waves

• X-rays

This is a picture of glacier scars found in Africa.  What are these evidence for?

• Africa has always been near the equator
• Africa was once in an area of the Earth that had a very cold climate
• The continents have not moved
• sea floor spreading

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

According to the continental drift hypothesis, the presence of similar fossils in South America and Africa supports which scientific idea?

• Animals easily and frequently travel from Africa to South America.

• Species of animals probably traveled between continents on natural rafts (such as trees destroyed in tsunamis).

• Land bridges once existed that connected the continents.

• South America and Africa were once connected together.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

The size of crystals in Igneous Rocks depends upon

• pressure

• the presence of air

• the presence of water

• cooling rate

Tags

NGSS.MS-PS3-4

Rocks that are formed from magma or lava are called

• sedimentary

• metamorphic

• igneous

• clastic

Extrusive rocks are formed

• underwater

• in a lab

• deep underground

• above the surface of a volcano

Coarse-grained intrusive igneous rocks result when

• Sedimentary rocks are cemented and compacted.

• magma cools quickly

• magma cools slowly

• lava cools quickly

Which characteristics could help you identify an igneous rock as cooling on the surface?

• Vesicles (air bubbles) and large crystals

• Vesicles (air bubbles) and very small or no crystals

• Large crystals and multi-colored

• Being dark or light in color and having layers

Mafic rocks are

• light in color due to high silica content

• coarse-grained

• dark in color due to their high iron and magnesium content

• fine grained