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?

Oxygen.
Helium.
Sodium.
Flourine.


Question 2. What does "thermal decomposition" mean, when referring to the limestone cycle?

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


Question 3. What is the formula of calcium carbonate?

CaO.
CO2.
Ca(OH)2.
CaCO3.


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

Calcium hydroxide.
Calcium oxide.
Calcium carbonate.
Calcium.


Question 5. What is the standard test for carbon dioxide?

Bubble it through limewater, where it will form a white calcium carbonate precipitate.
Add it to water, and it will raise the pH of the water.
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.


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