AnswersPARTA - EOP PGCPS BIOGEOCHEM CR FALL2026 - 798113Lab: Environmental Changes in a Watershed

Lab: Environmental Changes in a Watershed — Cumulative exam Answers

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1
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Which is the final event that occurs when a star is forming?

A
The outer layer of the star expands.
B
Gravity pulls gas and dust together.
C
A black hole forms as the core collapses.
D
Nuclear fusion begins under high pressure.
2
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What is the Milky Way?

A
a spiral galaxy in which Earth is located
B
an elliptical galaxy in which Earth is located
C
an irregular galaxy in which Earth is located
D
the closest galaxy to the one in which Earth is located
3

The sudden eruptions of energy from a small area of the Sun’s surface are known as

A
solar flares.
B
sunspots.
C
prominences.
D
solar winds.
4

Which is a type of star system?

A
dim stars
B
solar system planets
C
wobbling stars
D
globular clusters
5

Which type of volcanic mountain has wide, gentle slopes?

A
rift
B
shield
C
composite
D
cinder cone
6

Study this image of lithospheric plates.

Question illustration
A
Pacific, Eurasian, and African
B
African, North American, and South American
C
Eurasian, African, and South American
D
North American, Pacific, and African
7

Which describes vestigial structures and how they relate to evolution?

A
Snakes have tiny internal hind leg bones, indicating that they likely descended from lizards.
B
Humans and dogs have similar bone structures in their forelimbs, indicating a common ancestor.
C
Dolphins and birds have structures that are adapted for swimming, but the structures did not evolve the same way.
D
The DNA of mice and chickens shows similar patterns, suggesting that the two species are related.
8

Which is one benefit that mangrove trees provide to surrounding coastal wetlands?

A
They hold soil in place.
B
They store floodwaters.
C
They maintain surface water flow.
D
They filter water and improve water quality.
9

Which word identifies the agent that carries the energy released from earthquakes?

A
epicenter
B
focus
C
lithosphere
D
waves
10

Walt made a study chart listing uses for two types of electromagnetic waves.

Question illustration
A
A: Infrared WavesB: X-rays
B
A: MicrowavesB: Ultraviolet Waves
C
A: Ultraviolet WavesB: Gamma Rays
D
A: X-raysB: Radio Waves
11

A leech attaches to an animal and feeds off the animal's blood.What happens to the animal the leech attaches to in this scenario?

A
It loses nutrients to the leech.
B
It gains nutrients from the leech.
C
It will be killed and eaten by the leech.
D
It will kill and eat the leech.
12

Observable matter makes up about what percentage of the universe?

A
5%
B
10%
C
50%
D
95%
13

Which planet in the solar system is least dense?

A
Jupiter
B
Mercury
C
Neptune
D
Saturn
14

Which is one physical property that all stars have?

A
They are made of gases.
B
They shine very brightly.
C
They have a triangle shape.
D
They contain iron in their cores.
15

In a field, water flows down through the soil and then through a layer of loose rocks before the flow stops.What type of material did the water most likely encounter when it stopped?

A
a layer of granite
B
another soil layer
C
a layer of rocks with cracks
D
another layer of loose rocks
16

Which features form along all types of plate boundaries?

A
faults
B
rift valleys
C
mountains
D
ocean ridges
17

What is the correct order of star colors from hottest to coolest?

A
white, yellow, red, blue
B
yellow, orange, white, red
C
red, orange, yellow, blue-white
D
blue, white, yellow-white, orange
18

Which statement describes the location of an earthquake’s epicenter?

A
It is located using a single set of data.
B
It is determined by the Mercalli Scale.
C
It is determined by the arrival time of surface waves.
D
It is located at the point directly above the focus
19

According to embryology, which three species have the closest common ancestor?

A
insects, birds, and fish
B
amphibians, mammals, and birds
C
reptiles, amphibians, and bacteria
D
insects, bacteria, and reptiles
20

Which remains the same as the distance of an object from Earth changes?

A
size of the force
B
strength of gravity
C
mass of the object
D
weight of the object

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Lab: Environmental Changes in a Watershed