MC	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

On a mountaintop, you find rock samples that have large crystals and are heavy and dense. These rocks probably:

a. cooled underground and were then thrust up.

b. formed in quiet waters and were thrust up.

c. were compressed together and thrust up.

d. cooled quickly after a violent volcanic eruption.

e. were cemented together with chemicals on top of the mountain.

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

What evidence do we see that energy from the earthÕs interior has reached the surface?

a. large trees

b. volcanoes and earthquakes

c. the grand canyon

d. the global winds

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

Which event would most likely produce igneous rocks?

a. deposition

b. earthquake

c. flood

d. volcano

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

If you place your two fists together knuckle to knuckle and force one up and one down, your fists remain motionless until the forces become large enough to move. Then, your fists move all at once, bumping and jiggling across each other. As your fists slip and move, this most closely models which of these natural events?

a. river

b. avalanche

c. glacier

d. earthquake

Correct Answer: d

I	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

Tim studied the amount of energy that came to the surface of the earth from the interior, for 16 days. His special equipment printed the graph above. His notes taken during the study indicate that two earthquakes preceded the volcanic eruption on the 15^th day. Those occurred on the third and seventh days.

1. What could you assume about energy coming to the surface from this study?

a. There is no correlation between this study and earthquakes and volcanoes.

b. Less energy comes to the surface during earthquakes or volcanoes.

c. More energy comes to the surface before and after an earthquake than any other time.

d. Earthquakes and volcanoes deliver energy to the surface.

2. According to the graph, which event transferred the most total energy?

a. Days 3-4, earthquake 1

b. Days 4-6, volcanic eruption

c. Days 6-8, earthquake 2

d. Days 14-16, volcanic eruption

3. What would be the most logical explanation for the slow steady transfer of energy from days 9-12?

a. Heat and pressure were building under the surface.

b. Heat and pressure were being released under the surface.

c. Nothing was happening under the surface.

d. Energy was building on the surface.

Correct Answers:

1. d

2. d

3. a

E	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

Summarize the existing evidence that Earth is a moving, changing planet and describe how the Earth's moving and changing affects humans.

Scoring Guide:

Evidence

1 - Earthquakes caused by plate tectonics

2 - Volcanic activity caused by weathering

3 - Wearing down and building up caused by weathering

4 - Fossil evidence of warm creatures in cold climates and sea creatures high on mountains

Effect

1 - Research to build earthquake resistant buildings

2 - Research to build more effective weather resisting materials (i.e. paints, insulation, roofing)

3 - Seismic monitoring facilities

4 - Weather satellites

Rubric:

4 - Mention 3 from each area

3 - Mention 2 from each area

2 - Mention 1 from each area

1 - Mention 1 from 1 area

E	8^th Grade Integrated Science	Standard: 03
Objective: 04. Compare rapid and gradual changes to EarthÕs surface.
ILO:

Explain how it is possible for the ocean floor to be spreading yet the size of the earth doesn't change.

Ideal Answer: The ocean floor is spreading by new ocean crust forming at the mid-oceanic ridges. As it is making new ocean floor, it is pushing old ocean crust away from the ridges and pushing it downward and ∆ at the plate margins - into the mantle. In the mantle the crust is heated and returns to the form of magma, which supplies the material for new ocean crust.

Scoring Guide:

New ocean floor spreading from ridge-40%

Old ocean floor returning to mantle-40%

Spelling, punctuation, language usage-20%