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WorksheetsCounting Atoms and Rock Layers-State Test Review
Total questions: 10
Worksheet time: 6mins
How many atoms are in 6H₂O₂ ?
4
5
20
24
three hydrogen (H)
one sulfur (S)
four oxygen (O)
How many total atoms are in the compound 2H2O?
2
3
4
6
2CH3OH + 3O2 --> 2CO2 + 4H2O
2Mg + O2 ---> 2MgO
What are the oldest fossils and why?
B, C- because they are closest to the top
A, B- because they are closest to the bottom
They are all the same age- because they are all found on layer 2
A, B- because they are found closest to the top
Fossil A is an ancient mollusk, an organism that needs water to survive. Why do you think that the mollusk went extinct in this particular sample of the fossil record?
When the ocean levels rose in layer 4, the mollusk went extinct because they cannot live in water
For some reason, the ocean disappeared causing the mollusk to thrive
For some reason, the ocean disappeared causing the mollusk to go extinct
When the ocean level rose in layer 4, the mollusk thrived because they need water
