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. How do we form calcium hydroxide?

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


Question 2. Which of the following elements will form a carbonate?

Helium.
Flourine.
Oxygen.
Sodium.


Question 3. 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 breaks down into simpler compounds when heated.
It uses heat to rot away.


Question 4. What is formed when we add any carbonate to an acid?

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


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

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


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