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Plate Tectonics

Test Description: Semester 1

Instructions: Answer all questions to get your test result.

1) What causes convection currents in the asthenosphere that causes the plates to move?

ADifferences in density (cold sinking rock; hot rising rock) BDifferences in pressure (increasing as you get deeper in the Earth) CDifferences in composition (types of minerals that make up rocks) DDifferences in rock types (sedimentary, metamorphic)

2) Which layer of the Earth is the least dense and is the thinnest?

AInner core BOuter Core CLithosphere DCrust

3) What type of boundary formed the mid-ocean ridge?

AConvergent BTransform CSubduction DDivergent

4) Which layer of the Earth is the hottest and is composed of solid iron and nickel?

ACrust BAsthenosphere CInner Core DOuter Core

5) What is the process that creates new ocean crust at the divergent boundary?

Acontinental drift Bsea-floor shrinking Csea-floor spreading Dsubduction zone

6) What idea states that the continents were once joined together and have spread apart over millions of year?

AContinental drift theory BContinental convergent theory CContinental separation theory DSea-floor spreading theory

7) Which was NOT evidence used to support continental drift theory?

Afossils Bshapes of continents Cchanging climates in some places Dlithification of sediments

8) What happens to temperature, density, and pressure and you go from the crust to the core?

Aall increase Bdensity increases, the others decrease Call decrease Dtemperature increases, the others decrease

9) When you cook vegetable soup, you might notice the veggies swirling in a circle in the boiling liquid. What is this a model of?

AContinental drift BStratification in layers CConvection currents in the mantle DConvection currents in the inner core

10) If you find fossils of sea organisms on a mountain, what can you conclude?

AThe mountain was once part of the ocean floor BThe mountain was once in the ocean water CThe wind deposited the fossils on the mountain DThe sea organisms once lived on land

*select an answer for all questions

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