Snapquiz - The Limestone Cycle

This is the Snapquiz on The Limestone Cycle. Click here or use the embedded video if you haven't watched the lesson yet.

Question 1. Which of the following elements will form a carbonate?


Question 2. What is formed when we strongly heat limestone?

Calcium oxide.
Calcium hydroxide.
Calcium carbonate.

Question 3. What is the standard test for carbon dioxide?

Add it to water, and it will raise the pH of the water.
Bubble it through limewater, where it will form a white calcium carbonate precipitate.
Attempt to light it with a lit wooden spill, and it will cause a "squeaky pop" noise.
Introduce a smouldering wooden spill, and it will reignite.

Question 4. How do we form calcium hydroxide?

Add water to limestone.
Dissolve limestone in acid.
Add water to calcium oxide.
Add water to calcium carbonate.

Question 5. What does "thermal decomposition" mean, when referring to the limestone cycle?

It gives out heat as it breaks down.
It rots under hot conditions.
It uses heat to rot away.
It breaks down into simpler compounds when heated.

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