After School Review

The fossil Mucrospirifer is considered to be an index fossil because it existed over a

• small geographic region for a long period of time

• small geographic region for a short period of time

• large geographic region for a long period of time

• large geographic region for a short period of time

Compared to Earth’s outer core, the inner core properties are inferred to be

• less dense and a solid

• less dense and a liquid

• more dense and a solid

• more dense and a liquid

A seismic station 4000 kilometers from the epicenter of an earthquake records the arrival time of the first S-wave at 1:05:40 p.m. At what time did the first P-wave arrive at this station?

• 12:58:40 p.m.

• 1:00:00 p.m.

• 1:05:40 p.m.

• 1:11:20 p.m.

Which event is primarily responsible for the production of oxygen that first entered into Earth’s early atmosphere?

• evolution of oxygen-producing organisms

• radioactive decay of isotopes producing oxygen

• separation of oxygen from hydrogen in water

• oxygen-rich comets impacting Earth

Since the break up of Pangaea, it has been inferred that the continent of North America has been generally moving toward the

• northeast

• northwest

• southeast

• southwest

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The photograph shows fossilized ammonoids in a rock outcrop.

The presence of these fossils in the outcrop indicates that in the past, this region was most likely covered by

• desert sand

• ocean water

• glacial ice

• molten rock

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

The cross section represents rock units within Earth’s crust. Sedimentary rock layers are labeled 1 through 6.

The age of the igneous rock is

• older than rock layers 1 and 2

• the same age as rock layer 3

• older than rock layer 3

• younger than rock layers 4, 5, and 6

Tags

NGSS.MS-ESS1-4

The photograph shows boulders and other sediments that slid down a hillside.

This rock slide is most likely an example of

• mass movement due to prolonged periods of heavy traffic

• mass movement following prolonged periods of heavy rain

• abrasion by prolonged exposure to moving ice

• abrasion following prolonged exposure to wind action

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

The Mariana Trench is Earth’s deepest oceanic trench. This trench formed as the Pacific Plate was

• overriding the Philippine Plate

• overriding the Eurasian Plate

• subducting under the Philippine Plate

• subducting under the Eurasian Plate

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The diagram represents patterns of normal and reverse magnetic polarity in seafloor bedrock.

In which bedrock type and location can this magnetic pattern most likely be observed?

• igneous bedrock at the East Pacific Ridge

• igneous bedrock at the Tasman Hot Spot

• sedimentary bedrock at the East Pacific Ridge

• sedimentary bedrock at the Tasman Hot Spot

Tags

NGSS.MS-ESS2-3