AnswersFL-2003310-Physical ScienceUnit Test

Unit Test — Cumulative exam Answers

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1
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The diagram illustrates the water cycle.

Question illustration
A
precipitation
B
evaporation
C
condensation
D
transpiration
2
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Which organism would be the best subject for a study of both photosynthesis and cellular respiration?

A
a green plant
B
a chemosynthetic bacterium
C
an animal that eats plants
D
an animal that eats animals
3

When dissolved in water, an acid or a base breaks down into

A
a proton and an electron.
B
two negative ions.
C
a positive and a negative ion.
D
a positive ion and a proton.
4

A solution has a pH of 2. Which best describes the solution?

A
a strong acid
B
a strong base
C
a neutral solution
D
a weak base
5

Some consumers, like lions, do not eat plants or any other producers. They only eat other animals.How do lions obtain the carbon they need?

A
by eating animals that have carbon-based molecules stored in their bodies
B
by breathing it in from the atmosphere in the form of carbon dioxide
C
by absorbing carbon-based molecules through their skin from the soil
D
by drinking water that contains carbon dioxide
6

Read the following excerpt about water availability to living organisms.“Water covers 75 percent of Earth. 97 percent of water on Earth is salt water. Only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.” Based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink?

A
1 percent
B
3 percent
C
10 percent
D
75 percent
7

Which statement about water best illustrates the property of adhesion?

A
water droplet found on a spider web in the morning
B
water molecules in a drop of dew
C
water is necessary for animal respiration
D
water dissolving salt into a solution
8

The graphic below shows how photosynthesis and cellular respiration are related.Which label in the graphic represents the energy that is released from glucose by cellular respiration?

Question illustration
A
Oxygen
B
Glucose
C
Energy stored as ATP
D
Carbon dioxide and water
9

What ion do acids release in solution?

A
hydrogen
B
hydroxide
C
carbonate
D
ammonium
10

Which acid is naturally found in foods and can be safe to eat?

A
sulfuric acid
B
citric acid
C
hydrochloric acid
D
nitric acid
11

Which characteristic best distinguishes runoff and infiltration?

A
Runoff involves condensation and infiltration involves evaporation.
B
Runoff occurs over land and infiltration occurs underground.
C
Runoff occurs during floods and infiltration occurs during drought.
D
Runoff describes water movement and infiltration describes water storage.
12

Which sequence of processes transports water from the atmosphere to the ocean and then back into a cloud?

A
precipitation ® condensation ® transpiration
B
evaporation ® condensation ® sublimation
C
precipitation ® evaporation ® condensation
D
evaporation ® precipitation ® condensation
13

Which substance is a base?

A
HCOOH
B
RbOH
C
H2CO3
D
NaNO3
14

Which is a strong base?

A
HCl
B
NaOH
C
NH3
D
H3CO3
15

During the nitrogen cycle, through which structure are nitrogen compounds first absorbed into the plant?

A
roots
B
leaves
C
flower
D
stem
16

The equation shows a neutralization reaction.H2SO4 + 2NaOH Na2SO4 + 2H2O

Question illustration
A
an acid
B
a base
C
a salt
D
an ion
17

Which substance is used in lotions and cosmetics?

A
ammonium hydroxide
B
acetic acid
C
formic acid
D
zinc hydroxide
18

Rosa drew a flow chart of the carbon cycle.

Question illustration
A
X: Producers undergo photosynthesis.Y: Decomposers return carbon to the soil and release waste.
B
X: Decomposers return carbon to the soil and release waste.Y: Producers undergo photosynthesis.
C
X: Decomposers take in carbon dioxide.Y: Producers absorb carbon through their roots.
D
X: Producers absorb carbon through their roots.Y: Decomposers take in carbon dioxide.
19

Mira analyzed oxygen and carbon dioxide in inhaled and exhaled air. She found that the percentages of both gases were different in each. What other gas would most likely also have different amounts in inhaled and exhaled air?

A
ozone (O3)
B
hydrogen (H2)
C
water vapor (H2O)
D
sulfur dioxide (SO2)
20

An important difference between cellular respiration and photosynthesis is that when cellular respiration begins, glucose molecules are split. However, when photosynthesis begins

A
ADP molecules are split.
B
water molecules are split.
C
oxygen molecules are split.
D
carbon dioxide molecules are split.

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