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

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


Question 2. What is the important compound found in limestone?

Calcium hydroxide.
Calcium oxide.
Calcium carbonate.
Calcium.


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

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.
Add it to water, and it will raise the pH of the water.


Question 4. What is formed when we strongly heat limestone?

Calcium carbonate.
Calcium hydroxide.
Calcium.
Calcium oxide.


Question 5. What is formed when we add any carbonate to an acid?

An alkaline solution.
A salt and carbon dioxide.
A salt and hydrogen.
Hydrogen and carbon dioxide.


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