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1.8 - Rock Types and Erosion

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✅EvaluateQuestion 1 of 21

Which rock group forms when molten rock cools and solidifies?

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✅EvaluateQuestion 2 of 21

Rocks formed from layers of deposited material that become compacted and cemented are:

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✅EvaluateQuestion 3 of 21

Metamorphic rocks are produced mainly by:

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✅EvaluateQuestion 4 of 21

Weathering refers to the:

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✅EvaluateQuestion 5 of 21

Erosion is best described as the:

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✅EvaluateQuestion 6 of 21

'Differential erosion' means that:

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✅EvaluateQuestion 7 of 21

Which rock property usually increases resistance to erosion?

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✅EvaluateQuestion 8 of 21

A cliff in Barbados is made of hard limestone and remains steep, while a nearby clay slope slumps after heavy rain. This difference is mainly due to:

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✅EvaluateQuestion 9 of 21

A hillside on a volcanic island has loose ash deposits. After 120 mm of rainfall in a day, rills and gullies form quickly. The best explanation is that the ash is:

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✅EvaluateQuestion 10 of 21

A rock outcrop has many joints (cracks). Compared with the same rock with few joints, it will usually erode faster because joints:

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✅EvaluateQuestion 11 of 21

A river crosses a hard rock band and forms rapids. Downstream in softer rock, the river valley becomes deeper and wider. Which process best explains this pattern?

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✅EvaluateQuestion 12 of 21

Which statement correctly compares weathering and erosion?

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✅EvaluateQuestion 13 of 21

Which coastal landform is most likely where a band of hard rock meets the sea beside a band of softer rock?

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✅EvaluateQuestion 14 of 21

In Jamaica and the Bahamas, limestone areas may develop caves mainly because limestone:

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✅EvaluateQuestion 15 of 21

A coastal area has alternating rock types. After 50 years, the shoreline shows protruding headlands and indented bays. Which explanation best accounts for this change?

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✅EvaluateQuestion 16 of 21

Which combination of factors would make a rock MOST resistant to erosion?

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✅EvaluateQuestion 17 of 21

A student says, “Limestone always erodes quickly because it dissolves.” Which is the best evaluation of this statement?

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✅EvaluateQuestion 18 of 21

A slope is made of alternating layers of solid lava and loose ash. After intense rainfall, gullies deepen mainly in the ash layers. What is the best explanation?

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✅EvaluateQuestion 19 of 21

Which set of statements is correct? 1. There are many different types of rock. 2. Some rocks resist erosion better than others. 3. Erosion breaks rock down in place without movement. 4. Jointed rocks often erode faster than unjointed rocks.

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✅EvaluateQuestion 20 of 21

A coastal engineer must choose a safer location for a small jetty. Site X is beneath a fractured, soft cliff; Site Y is beneath a more solid, well-cemented cliff. Which choice is safer and why?

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✅EvaluateQuestion 21 of 21

A river valley shows a narrow, steep-sided section followed by a wide, gentle section. The river flows at the same discharge in both sections. Which interpretation best explains the difference?

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✅EvaluateQuestion 1 of 21

Which rock group forms when molten rock cools and solidifies?

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