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 is the important compound found in limestone?

Calcium carbonate.
Calcium oxide.
Calcium hydroxide.

Question 2. What is formed when we add any carbonate to an acid?

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

Question 3. What does "thermal decomposition" mean, when referring to the limestone cycle?

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

Question 4. Which of the following elements won't form a carbonate?


Question 5. The formation of calcium hydroxide is exothermic. What does "exothermic" mean?

It releases heat.
It absorbs heat.
It only happens when it's heated.
It doesn't change in temperature.

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