Earth science Topic 5

Sinkholes are extremely dangerous because they occur quickly and without warning. Sinkholes are a result of both mechanical and chemical weathering.

More sinkholes for each year in florida than in any other state. Which of these explains why sinkholes occur so often in Florida?

• because of the beaches

• because of the low elevations

• because of the high temperatures

• because the soft rock underground

Juan is skipping rocks by the lake. As he picks up a pebble, he notices that it is smooth all over. which of the following hypotheses is the most likely explanation for how the river became so smooth?

• acid rain dissolved it

• a glacier wore it down

• wind blew against it and wore down the river rock

• waves on the lake tumbled it against other rocks

Howard is making a class presentation about the process of abrasion and he wants to model the process. Which of these can Howard do to model the process of abraision?

• Pour water over a pie of sand

• rub a soft rock on a rough surface

• put iron filings in a beaker of water

• place a few small drops of acid on a rock.

Emily mixes cornstarch with wter on top of pebbles in a pan to build a model of a glacier. She places the pan on a textbook at a tilt. Next, she observes as the glacier with pebbles moves slowly and deposits till at the bottom of the pan. What does the glacial till form at the bottom of the pan?

• horn

• arete

• cirque

• moraine

Is the land form below Deposition or by Erosion

Sea Arch

• Erosion

• Deposition

Is the land form below Deposition or by Erosion

Barrier Island

• Erosion

• Deposition

Is the land form below Deposition or by Erosion

Sea Stack

• Deposition

• Erosion

Is the land form below Deposition or by Erosion

Sandbar

• Erosion

• Deposition

Is the land form below Deposition or by Erosion

Sea Cave

• Erosion

• Deposition

What causes caves to form?

• Physical weathering form wind

• chemical weathering from air in the thecave

• physical weathering from animals burrowing

• chemical weathering from water underground