AnswersCA-Integrated Science 8 BCumulative Exam

Cumulative Exam — Cumulative exam Answers

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Which will reduce the possible environmental damage associated with mining uranium?

A
installing newer water recycling systems in older power plants
B
increasing the reprocessing of used fuel for reuse
C
building additional fission nuclear power plants
D
developing better places to store radioactive wastes
2
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Mateo’s parents are thinking about investing money to help develop a new fusion power plant. Which issue is most important to consider before making the investment?

A
Fusion has never been controlled, so how have they succeeded in doing it?
B
The fuel is quite limited, so have they discovered a more common fuel?
C
Fusion has been generating electricity for decades, so why build another fusion power plant?
D
Fusion requires high temperatures and pressures, so how have they reduced the energy cost for it?
3

Several butterflies within a large population have wings with large dots on them. This wing pattern warns predators not to eat the butterflies.

A
favorable adaptation, which is one condition required for natural selection
B
unfavorable adaptation, which is passed on to offspring in all cases
C
favorable adaptation, which is passed on to offspring in very few cases
D
unfavorable adaptation, which is not a condition for natural selection
4

Which statement can be made about the amplitude of any transverse wave?

A
It is the length from the midpoint to the crest.
B
It is half the length from the midpoint to the trough.
C
It is the length of the wavelength.
D
It is half the length of the wavelength.
5

Donna shines a flashlight and a laser pointer on a sheet of paper. She holds each device at an equal distance from the paper. How does the light hitting the paper from each device appear different?

A
The light from the flashlight lights up a larger area of the paper.
B
The light from the laser pointer lights up a larger area of the paper.
C
The light from the flashlight magnifies a larger area of the paper.
D
The light from the laser pointer magnifies a larger area of the paper.
6

Which do sound waves travel fastest through?

A
solids
B
gases
C
mixtures
D
liquids
7

The diagram shows two objects made of the same kind of glass.Which statement best compares light passing through the two blocks?

Question illustration
A
Light is not separated by wavelength as it exits Object X.
B
Light moves faster as it moves within Object X.
C
Light is only refracted once as it passes in and out of Object Y.
D
Light is refracted less when it passes through Object Y.
8

Some illnesses and harmful infections are caused by bacteria. These bacteria grow in the human body and often make people sick with symptoms like coughing, sneezing, and fever. These illnesses are not related to any genetic mutations or other problems with DNA.

A
Gene therapy reduces symptoms but never cures illnesses.
B
Gene therapy does not work on most people.
C
Gene therapy only focuses on replacing mutated genes.
D
Gene therapy is too long a process.
9

Jin has four colorful glass bottles on his windowsill. One is red, one is violet, one is green, and one is yellow. The light that passes through which bottle has the lowest frequency?

A
red
B
violet
C
green
D
yellow
10

Which timeline shows the correct order of contributions made to the discovery of DNA?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
11

The lens in the eyepiece of a reflecting telescope breaks. How will this most affect the function of the telescope?

A
Magnified images will appear upside down.
B
Magnified images will not be created.
C
Light from distant objects will not be captured.
D
Light rays will not be sent to the eyepiece.
12

Which is a cause of desertification?

A
farming
B
creating reservoirs
C
overgrazing
D
driving motor vehicles
13

The diagram below illustrates the law of reflection. Which is the angle of reflection?

Question illustration
A
A
B
B
C
C
D
D
14

A 2-column table with 4 rows. The first column labeled wave has entries W, X, Y, Z. The second column labeled Observations has entries its motion is perpendicular to wave motion, its particles move up and down, its particles only move small amounts, its motion is parallel to wave motion.

Question illustration
A
Waves W and Y are transverse waves, Wave X could be a longitudinal or transverse wave, and Wave Z is a longitudinal wave.
B
Waves W and Y are longitudinal waves, Wave X could be a longitudinal or transverse wave, and Wave Z is a transverse wave.
C
Waves W and X are longitudinal waves, Wave Y could be a longitudinal or transverse wave, and Wave Z is a transverse wave.
D
Waves W and X are transverse waves, Wave Y could be a longitudinal or transverse wave, and Wave Z is a longitudinal wave.
15

Which waves can travel through space?

A
electromagnetic waves only
B
mechanical waves only
C
electromagnetic and mechanical waves
D
longitudinal and electromagnetic waves
16

An angle of refraction is the angle between the refracted ray and the

A
incident ray.
B
normal.
C
medium.
D
boundary.
17

What is common between transverse waves and longitudinal waves?

A
Both include an amplitude, crest, and rarefactions
B
Both move faster at higher temperatures
C
Both move slower through densely packed molecules
D
Both include a wavelength from compression to compression
18

One coiled spring is shown in the diagram.

Question illustration
A
protein
B
gene
C
nitrogen base
D
backbone
19

What caused natural selection among the peppered moths of Manchester, England?

A
natural environmental changes
B
human-caused environmental changes
C
genetic stability in the population
D
resource stability in the population
20

Which trait shared by dolphins and bats possibly led to the evolution of echolocation in these two animal groups?

A
the need to move quickly through dark environments
B
the need to be able to send sound waves through the air
C
the need to be able to send sound waves through the water
D
the need to communicate with other species through echolocation

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