AnswersCA-Integrated Science 8 BCumulative Exam

Cumulative Exam — Cumulative exam Answers

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Amara draws the ray diagram shown.Which describes Amara’s mistake?

Question illustration
A
She should have drawn a concave lens instead of a convex lens.
B
She should have drawn the image right-side up instead of upside down.
C
Ray 2 should cross through the focal point on the right side of the lens.
D
Ray 3 should point at a downward angle after passing through the lens.
22
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Zoe read that drinking water from a faucet instead of from a plastic bottle helps overcome a disadvantage of using nonrenewable resources. Which conclusion is best supported by this information?

A
Water can be used up and cannot be replaced.
B
Plastic is made from petroleum oil.
C
Making plastics is inexpensive.
D
The water in faucets in healthier.
23

In which direction of the wave motion do longitudinal waves transfer energy?

A
perpendicular
B
parallel
C
close
D
equal
24

Xavier used a chart to list the roles of two different molecules in protein production. Which headings best complete the chart?

Question illustration
A
Y: DNAZ: tRNA
B
Y: tRNAZ: DNA
C
Y: mRNAZ: tRNA
D
Y: tRNAZ: mRNA
25

genetic mutationnatural selectionpopulation growthasexual reproduction

A
genetic mutation
B
natural selection
C
population growth
D
asexual reproduction

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