Name two sedimentary rocks and two metamorphic rocks from the following list:
Basalt, marble, sandstone, granite, quartzite, limestone:
(i) Two sedimentary rocks - Leaving Cert Agricultural Science - Question 1 - 2016
Question 1
Name two sedimentary rocks and two metamorphic rocks from the following list:
Basalt, marble, sandstone, granite, quartzite, limestone:
(i) Two sedimentary rocks.
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Worked Solution & Example Answer:Name two sedimentary rocks and two metamorphic rocks from the following list:
Basalt, marble, sandstone, granite, quartzite, limestone:
(i) Two sedimentary rocks - Leaving Cert Agricultural Science - Question 1 - 2016
Step 1
Two sedimentary rocks.
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Answer
Sandstone
Limestone
Step 2
Two metamorphic rocks.
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Answer
Marble
Quartzite
Step 3
In which flask did the limewater change colour?
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Answer
The limewater changed colour in Flask A.
Step 4
Explain why the limewater changed colour.
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Answer
The limewater changed colour because microorganisms or living organisms in Flask A release carbon dioxide (CO₂) during respiration, which reacts with the limewater.
Step 5
How was the soil in Flask B sterilised?
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The soil in Flask B was sterilised by heating it strongly or by using a disinfectant to eliminate any microorganisms.
Step 6
One of the flasks was used as a control. What is meant by this?
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Answer
Using one flask as a control means that it serves as a standard for comparison. It demonstrates how the experiment would behave without the variable that affects the other flask.
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