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Worksheets

Practice for Exam

Total questions: 140

Worksheet time: 2hrs 55mins

Name
Class
Date
1.

Aluminum is refined from bauxite, which is found in the ground under rainforests. Humans must destroy this habitat to mine the bauxite and make aluminum. This type of habitat destruction will most likely result in ---

a)

A. an increase in rainfall

b)

B. an increase in number of species

c)

C. a decrease in biodiversity

d)

D. a decrease in cloud formation

2.

In an ecosystem, which type of animal would best be described as a secondary consumer?

a)

Carnivore

b)

Herbivore

c)

Omnivore

d)

Decomposer

3.

In an ecosystem, which animal would best be described as a secondary consumer?

a)

A. Rabbit

b)

B. Grasshopper

c)

C. Coyote

d)

D. Human

4.

Which best describes a type of organism that lives on, and feeds off of plants or other organisms?

a)

saprophytes

b)

autotrophs

c)

omnivores

d)

tracheophytes

5.

An organism that stalks, kills, and eats other animals is known as a ---

a)

consumer

b)

scavenger

c)

herbivore

d)

producer

6.

An organis that creates nutrients using energy from the sun, is known as a ----

a)

A. predator

b)

B. scavenger

c)

C. herbivore

d)

D. producer

7.

Which of the following situations contributes to the sustainability of an ecosystem

a)

A. Increase in biodiversity

b)

B. Decrease in biodiversity

c)

C. Extinction of a population from the ecosystem

d)

D. Removal of many populations of organisms

8.

Complete this statement. The more diverse an ecosystem is ----

a)

A. the more threatened its populations are

b)

B. the more similar the species will be

c)

C. the more stable it is

d)

D. the few varieties of species are present

9.

Which of the following is not an example of how biodiversity contributes to the sustainability of an ecosystem?

a)

A. Controlling pest species

b)

B. Providing potential for medical discoveries

c)

C. Creating a limited gene pool for future generations

d)

D. Regulating the chemistry of air and water supply

10.

An ecosystem experiences a ten year drought. As a result of the drought, many plant and animal species are not able to survive. What will be the effect on the biodiversity and sustainability of the ecosystem?

a)

A. Increased biodiversity and increased sustainability

b)

B. Decreased biodiversity and increased sustainability

c)

C. Increased biodiversity and decreased sustainability

d)

D. Decreased biodiversity and decreased sustainability

11.

Why does higher biodiversity cause an ecosystem to be more sustainable?

a)

A. There are more types of organisms competing for living space in the ecosystem.

b)

B. There are a greater variety of genes and species in the ecosystem.

c)

C. There are more animals preying on one another in the ecosystem.

d)

D. More organisms decrease the rate of disease in and ecosystem.

12.

Refer to the food web. If the grasses in each ecosystem are attacked and killed by a disease, which ecosystem will most likely survive?

a)

A. The prairie ecosystem, because few organisms eat grass.

b)

B. The tundra ecosystem, because there is a variety of producers.

c)

C. The prairie ecosystem, because there a fewer top predators.

d)

D. The tundra ecosystem, because it has more herbivores.

13.

Which statement below best describes how biodiversity contributes to the sustainability of an ecosystem?

a)

A. A variety of plant and animal species allows for more survivors of a natural disaster.

b)

B. Having more species in an ecosystem allows the human population to increase in size.

c)

C. Low biodiversity reduces the competition for resources, which helps native species survive.

d)

D. Few species in the ecosystem reduces the likelihood that disease spreads through the ecosystem.

14.

Based on the table of observations, which ecosystem is likely to be the least sustainable?

a)

A. Ecosystem 1, because it has the fewest species

b)

B. Ecosystem 2, because it includes both aquatic and terrestrial species.

c)

C. Ecosystem 3, because it has few predators.

d)

D. Ecosystem 4, because it supports many animals.

15.

Students were asked to make a claim supported with evidence to answer the question, "Which ecosystem would be most sustainable if all the grasses died from severe drought?" What claim is valid and supported by the evidence?

a)

A. The forest ecosystem is most suitable because there are more top predators.

b)

B. The grassland ecosystem is most sustainable because there are fewer organisms that eat grass.

c)

C. The forest ecosystem is most sustainable because most of the animals can eat other organisms.

d)

D. The grassland ecosystem is most sustainable because there is less competition for food.

16.

An ecosystem that is not sustainable can break down when a natural disaster occurs. This can lead to organisms in the ecosystem either leaving the area or dying off. Increased biodiversity results in a more sustainable ecosystem because ---

a)

A. a greater number of plant species means that there is less barren land.

b)

B. a greater variety of species present allows more organism to adapt after changes occur

c)

C. the transition area between two ecosystems is narrower.

d)

D. there are few species to be affected by environmental stressess.

17.
How much energy is passed on to each trophic level in an energy pyramid?
a)
10%
b)
90%
c)
50%
d)
80%
18.

Which organisms have the most available energy in an energy pyramid?

a)

Producers

b)

Consumers

c)

Decomposers

d)

Detritivores

19.
Where do crickets get their energy?
a)
Cattails
b)
Marsh Grass
c)
Grasshoppers
d)
Shrews
20.
If additional snakes are introduced into this ecosystem, there will most likely be an immediate decrease in the _________.  
a)
hawk population
b)
rabbit population
c)
wildflower population
d)
grass population
21.
Which would be the appropriate term for an organism that eats a producer?
a)
scavenger
b)
decomposer
c)
secondary consumer
d)
primary consumer
22.
All of the following are consumers except
a)
Autotrophs
b)
Herbivores
c)
Heterotrophs
d)
Ominvores
23.

In this food chain, the snake would be a

a)

tertiary consumer

b)

secondary consumer

c)

primary consumer

d)

producer

24.

Organisms that produce their own food mostly through photosynthesis (producers). Examples are plants and algae.

a)

Ominvore

b)

Detritivore

c)

Heterotroph

d)

Autotroph

25.

Organisms that get their energy and nutrition from other organisms (consumers).

a)

Heterotroph

b)

Autotroph

c)

Decomposer

d)

Detritivore

26.
The owl and weasel compete for which organism?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
27.

Why is some energy not passed on to the next trophic level?

a)

The organisms at each level use about 90% of the available energy to live.

b)

The statement is NOT true. All energy IS passed from one trophic level to the next.

c)

The organisms at each level use about 10% of the available energy to live.

d)

Most energy is absorbed by the soil instead.

28.
The diagram represents a pyramid of energy in an ecosystem.  Which level would most likely contain organisms that can photosynthesize?
a)
A
b)
B
c)
C
d)
D
29.

A Student drew atomic models of four atomic models. Based on the drawings, which one is the least reactive?

a)

Chlorine, because it has three energy levels with seven electrons in the third level

b)

Gallium, because it has four energy levels with three electrons in the fourth level

c)

Neon, because it has two energy levels with eight electrons in the second level

d)

Tin, because it has five energy levels with four electrons in the fifth level

30.

An atom of which element is represented by this model?

a)

Carbon (C)

b)

Neon (Ne)

c)

Sodium (Na)

d)

Boron (B)

31.

A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?

a)

The 20 protons in each atom of calcium

b)

The 2 valence electrons in each atom of calcium

c)

The atomic mass of calcium, which is 40.078 amu

d)

The density of calcium, which is 1.54 g/cm3

32.

How many valence electrons does the atom of Carbon-14, shown above have?

a)

14

b)

10

c)

6

d)

4

33.

An element’s reactivity and other chemical properties are determined by the number of -

a)

isotopes it has.

b)

oxidation states.

c)

valence electrons.

d)

orbitals in an atom.

34.

Which of the following properties uniquely identifies every element?

a)

Number of valence electrons

b)

Charge of the atom

c)

Number of neutrons

d)

Number of protons

35.
a)
2
b)
8
c)
3
d)
13
36.

Valence electrons are electrons in the shell

a)

furthest from the nucleus

b)

closest to the nucleus

c)

having the lowest energy level

d)

that has the fastest electrons

37.

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

a)

1

b)

2

c)

8

d)

18

38.

What are valence electrons?

a)

The total number of electrons in an atom

b)

The number of electrons in the outermost shell

c)

The number of electrons in the second shell

d)

The number of protons in the outermost shell

39.
a)
1
b)
2
c)
3
d)
4
40.
a)
2
b)
6
c)
10
d)
16
41.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
42.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
43.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
44.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
45.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
46.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
47.

In this chemical equation ,the small numbers dropped down below the letters like the 4 in CH4 are known as the

a)

Products

b)

Reactants

c)

Coefficient

d)

Subscript

48.

How many Carbons are on EACH side of the chemical reaction?

a)

1

b)

3

c)

4

d)

5

49.

Looking at the reactants, there is _____ molecule(s) of CH4 and _______ molecule(s) of O2.

a)

1, 1

b)

1, 2

c)

2, 2

d)

2, 4

50.

Looking at the products , there is _____ atom(s) of Oxygen in CO2 and _______ atom(s) of Oxygen in 2H2O.

a)

1, 1

b)

1, 2

c)

2, 2

d)

2, 4

51.
Small pieces of rock broken down by weathering and then settling in an area is called_______?
a)
sediment
b)
weathering
c)
deposition
d)
CJ
52.

The natural process by which atmospheric and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks are known as...

a)

Weathering

b)

Erosion

c)

Deposition

d)

Decomposition

53.

What is the process that picks up and moves weathered rocks?

a)

Deposition

b)

Landslide

c)

Weathering

d)

Erosion

54.

Deposition changes the Earth’s surface because bits of broken rock and soil _____.

a)

stop rivers from flowing.

b)

make rich farmlands.

c)

are dropped in new places and laid down.

d)

move very slowly.

55.

Roots grow into cracks of a rock and pry them apart ...

(the mechanical breakdown of rocks into smaller pieces that is caused by natural processes that does not change the chemical composition of the rock material)

a)

physical (mechanical) weathering

b)

chemical weathering

c)

erosion

d)

deposition

56.
oxidation produces rust on some rocks containing iron
a)
chemical weathering
b)
mechanical weathering
c)
erosion
d)
deposition
57.
rock is broken by the freezing and thawing of ice
a)
chemical weathering
b)
mechanical weathering
c)
erosion
d)
deposition
58.
plants produce weak acids that slowly dissolve the rock they are growing on
a)
chemical weathering
b)
mechanical weathering
c)
erosion
d)
deposition
59.
Flood water pounding against a canyon wall and wearing it down is an example of
a)
Weathering
b)
Erosion
c)
Deposition
d)
An avalanche
60.
What is a watershed?
a)
Water in an area
b)
Water that flows into a river or stream
c)
Land that water flows over and through
d)
Water that is salty
61.
What is all the water that runs off the surface of the land and washes into rivers, streams, and other waterways called?
a)
Runoff
b)
Storm Drain
c)
Surface Water
d)
Tributary
62.
What is a stream or river that feeds into a larger body of water?
a)
Tributary
b)
Estuary
c)
Bay
d)
Watershed
63.
Pollutants from a factory that enter the water in a watershed 
will have a negative effect on which of the following?
a)

Available space for crops
b)
Local pond life
c)
Rainfall rates
d)
Direction of river flow
64.
Define tributaries
a)
small rivers or streams that flow into a large river or stream
b)
a natural stream of water of considerable volume
c)
precipitation that flows over the land to streams
d)
a continuous ridge that separates a watershed
65.

The upper surface of an aquifer is known as a?

a)

geyser

b)

aquifer

c)

water table

d)

well

66.

Which two wells are at risk of being contaminated by the oil leak?

a)

A and B

b)

A and D

c)

B and C

d)

C and D

67.
Groundwater contamination…
a)
is easily cleaned up
b)
is difficult to clean or remove
c)
is not a problem for modern people
d)
does not affect the United States
68.
How do people extract groundwater?
a)
groundwater cannot be extracted
b)
by drilling wells and pumping water out of the ground
c)
mining water from the Earth
d)
answer not shown
69.
What do all the sources of groundwater contamination shown have in common?
a)
caused by humans so it is preventable
b)
naturally occurring so it cannot be prevented
70.

Based on the data, which number shows the correct location of the element with 2 valence electrons and 3 energy levels.

a)

1

b)

2

c)

3

d)

4

71.

Based on the data, which number shows the correct location of the element with 2 valence electrons and 1 energy levels.

a)

1

b)

2

c)

3

d)

4

72.

Which pair of properties describe the elements in group 18

a)

They have 8 valence electrons and are very reactive

b)

They have 8 energy levels and are stable

c)

They are gases at room temperature and are stable

d)

They are gases at room temperature and very reactive.

73.

Which statement best describes the position of the two elements in the periodic table.

a)

The two elements are in the same period, with Mg the first element in the period table and Ca the last element

b)

The two elements are in the same group, with Mg just above Ca

c)

The two elements are side by side in the same period, with Ca to the left of Mg

d)

The two elements are in the same group, with Ca just below Mg

74.

Which of these elements is in this group?

a)

Lithium

b)

Silicon

c)

Aluminum

d)

Strontium

75.

Which two elements on the periodic table are in the same group?

a)

Na and He

b)

O and C

c)

Li and Ne

d)

He and Ar

76.

Which pair of properties describes the elements in Group 1?

a)

They are chemically stable

b)

They have 8 valence electrons

c)

They are the most reactive metals

d)

They are the most reactive non metals

77.

How many valence electrons are in an element in group 15 in the periodic table?

a)

5

b)

15

c)

7

d)

8

78.

Which two atoms are elements in the same group in the periodic table?

a)

Atom 3 and Atom 4

b)

Atom 1 and Atom 4

c)

Atom 3 and Atom 2

d)

Atom 1 and Atom 2

79.

Which two atoms are elements that belong in period two in the periodic table?

a)

Atom 3 and Atom 4

b)

Atom 1 and Atom 4

c)

Atom 3 and Atom 2

d)

Atom 1 and Atom 2

80.

Based on the data, which number shows the correct location of the element that is brittle and dull.

a)

1

b)

2

c)

3

d)

4

81.

Based on the data, which number shows the correct location of the element that is malleable and a good conductor.

a)

1

b)

2

c)

3

d)

4

82.
Coloring or another physical characteristic that help an organism blend in with its environment
a)
mimicry
b)
camouflage
c)
hibernation
d)
migration
83.
The seasonal movement of an organism from one place to another
a)
camouflage
b)
migration
c)
hibernation
d)
function
84.
When an organism copies a characteristic of something else in order to better its chances for survival and reproduction
a)
hibernation
b)
camouflage
c)
mimicry
d)
migration
85.
When an organism slows its life functions for a period of time to better its chances for survival during harsh conditions
a)
camouflage
b)
migration
c)
mimicry
d)
hibernation
86.
The place or environment where an organism naturally lives
a)
function
b)
habitat
c)
community
d)
ecosystem
87.
features that help identify something
a)
appearance
b)
characteristics
c)
behaviors
d)
structures
88.

What does external mean?

a)

It means something on the inside.

b)

It is a part of the environment that you see.

c)

It means on the outside, or something you can see.

d)

It means it is something you place on the outside.

89.
Function is ________________________.
a)
the way something looks
b)
how something sounds
c)
what something does
d)
the role of an organism
90.

What kind of beak does a pelican have?

a)

It has a sharp, curved beak to tear its food.

b)

It has a long, thin beak that allows it to suck nectar.

c)

It has a long beak with a pouch to scoop up food in the water.

d)

It has a short, stubby beak to peck things with.

91.

What is meant by adaptation?

a)

An animal can swim in warm water and cold water.

b)

It is any characteristic that helps a plant or animal survive in its environment.

c)

It is a habitat that animals can change.

d)

They develop over long periods of time.

92.

Plants must adapt to their environment, too. Plants that live in dry climates usually have

a)

big, round stems

b)

wide leaves to absorb sunlight

c)

small leaves coated in thick wax

d)

short, small leaves

93.

What adaptation is represented by the image?

a)

Camouflage

b)

Beak Design

c)

Hibernation

d)

Seed Dispersal

94.
In the Arctic there is often snow on the ground. Many Arctic animals are able to change their coloration. Which adaptation best helps an Arctic hare survive in its environment?
a)
thick, white fur
b)
ability to run fast
c)
ability to burrow
d)
a short, fluffy tail
95.

During an experiment, a student combines a solid, metallic substance with a clear liquid in a beaker. The mixtures turns hot, produces bubbles, and sparks. Based on the observations, the student can conclude that –

a)

A. a phase change has occurred.

b)

B. atoms have been rearranged to form a new substance.

c)

C. the products are likely harmful to human skin.

d)

D. the metal substance is a poor conductor of heat.

96.

When vinegar and baking soda are combined, bubbles begin to form. Bubbles are evidence of a chemical reaction because they -

a)

A. are less dense than air.

b)

B. form at a fast rate.

c)

C. released a gas

d)

D. have no mass.

97.

Which of the following examples would support that a chemical reaction has occurred?

a)

A. After putting liquid batter into a hot pan, the batter solidifies and begins to turn brown.

b)

B. After turning on a blender filled with fruits, the fruit is chopped up and mixed together.

c)

C. After taking a tray filled with ice cubes out of the freezer, the cubes begin to melt.

d)

D. After adding a spoonful of sugar to a mug of hot coffee, the sugar dissolves completely.

98.
These catastrophic events are often caused by lightening or human activities.
a)
Wildfires
b)
Thunderstorms
c)
Tornadoes
d)
Earthquakes
99.
Which of these is a positive impact of wildfires?
a)
They destroy animal life
b)
Destroy infastructure
c)
Flooding
d)
They help increase nutrients in the soil
100.
A violently rotating column of air extending from a thunderstorm to the the ground:
a)
Tornado 
b)
Hurricane
c)
Flood
d)
Wind Storm
101.
A large tropical weather system with heavy rains and high wind speeds:
a)
Tornado
b)
Volcano
c)
Hurricane
d)
Tsunami 
102.

Extreme weather events that cause an impact on the ecosystem, people, and property:

a)

Ecosystem

b)

Catastrophic Events

c)

Storms

d)

Bad Weather

103.

High winds, uprooted trees, and loss of topsoil are all negative impacts of which of these events?

a)

Wildfires

b)

Floods

c)

Tornadoes

d)

Earthquakes

104.
Which natural disaster is an overflowing of a large amount of water beyond its normal confines, especially over what is normally dry land?
a)
Tsunami 
b)
Drought
c)
Tornado
d)
Flooding
105.
How can floods positively impact ecosystems?
a)
flush out all non beneficial organisms
b)
create new ponds
c)
recharge and replenish ground water, bring in nutrients to the soil from river, renewal of wetlands
d)
none of the above
106.

Identify the fish

a)

Sebastes serriceps

b)

Sebastes nebulosus

c)

Naucrates ductor

d)

Seriola lalandi

107.
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
a)
Whip Scorpion
b)
Wind Scorpion
c)
Daddy long legs
d)
Scorpion
108.
An illustration and a dichotomous key are given. What is the correct classification for this organism?
a)
Class Insecta
b)
Order Amblygygi
c)
Order Araneae
d)
Order Scorpiones
109.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
110.
A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
a)
Coleoptera
b)
Heteroptera
c)
Diptera
d)
Lepidoptera
111.
Using this dichotomous key, identity the name of the circled fish.
a)
band-tail puffer
b)
spotted goat fish
c)
peacock flounder
d)
trumpet fish
112.

Solange found a bird that fell out of its nest. She used a dichotomous key to help her decide which type of bird she found and what it eats. She concluded that the bird she found eats grub worms.

What information about the bird led her to this conclusion?

a)

The bird has talons and a short, pointed beak.

b)

The bird has webbed feet and a throat pouch.

c)

The bird has webbed feet and a short, round beak.

d)

The bird has talons and a long, pointed beak.

113.

Refer to the leaf diagrams and the dichotomous key. What is the correct classification of Leaf E?

a)

Aesculus

b)

Horse Chestnut

c)

Eastern Red Cedar

d)

Sycamore

114.
Using this dichotomous key, identify the name of the circled Fish, J.
a)
peacock flounder
b)
band-tail puffer
c)
trumpet fish
d)
spotted goat fish
115.

Where the better adapted organisms survive to pass traits along to offspring.

a)

Evolution

b)

Natural Selection

c)

Selective breeding

d)

Artifical Selection

116.

Natural selection means that what is changing over time?

a)

The inherited traits of a population.

b)

The acquired traits of a population.

c)

Hair color and eye color

d)

Attractive features.

117.

Why are favorable (advantageous) traits more likely to be passed onto offspring?

a)

Organisms that have them are more likely to survive and reproduce.

b)

Favorable traits come from dominant alleles.

c)

Favorable traits come from recessive alleles.

d)

Because the trait is an acquired phenotype.

118.

Which organisms are most likely to survive?

a)

the best adapted

b)

the fastest

c)

the strongest

d)

the most domesticated

119.
Do organisms "decide" to evolve and change?
a)
Yes, they know they need to change to survive 
b)
No, they change because of natural selection
120.
The trees these moths used to live on were white, but have been covered in soot from coal factories. Which moth will be more successful in this environment?
a)
Dark moth
b)
Light moth
c)
Both will be equally successful
d)
Neither will be successful
121.

Since the 1800s humans have stopped burning coal, and the trees have returned to their original color. What will we likely see in 50 years?

a)

A population of mostly dark moths

b)

A population of mostly light moths

c)

Equal numbers of light and dark moths

d)

All moths will become extinct from predation

122.

What process is being shown in this image? (click the picture to make it bigger)


Description: First, there were more light mice than dark ones. More light mice got eaten, more dark mice survived. After a few years, most of the mice were dark.

a)

Variation

b)

Natural Selection

c)

Selective Breeding

d)

Homeostasis

123.

Polar bears are carnivorous, and classified as marine mammals because they have evolved to spend much of their time in the water. What environmental condition probably led to these adaptations?

a)

lack of available fish in the ocean

b)

climate becoming colder

c)

presence of predators on land

d)

lack of available food sources on land

124.

Both of these animals are the SAME SPECIES. Which process explains why they look so different from each other?

a)

natural selection

b)

predation

c)

selective breeding

d)

survival of the fittest

125.

What are the different parts of an atom?

a)

Nucleus,Electron Cloud

b)

Protons,Electrons,and Nucleus

c)

Nucleus,Protons,Neutrons,Electrons,and Electron Cloud

d)

Atomic Mass

126.

All atoms have a different Atomic Mass.

a)

True

b)

False

127.

How much charge does a neutron have?

a)

0 charge

b)

1

c)

more than 1

128.

Where are the electrons located in an atom?

a)

Nucleus

b)

Electron Cloud

c)

Atomic Number

d)

Atomic Mass

129.

What is located inside the Nucleus?

a)

Electrons

b)

Protons and Electrons

c)

Neutrons and Protons

d)

Electron Cloud

130.

Where are the valance electron located in a Bohr model?

a)

Outer Shell

b)

Inner Shell

c)

Nucleus

d)

Valance Electrons can't be found in this model.

131.

Which group of Elements is the most stable in the periodic table?

a)

Noble Gasses

b)

The Noble

c)

Least Reactive

d)

Non-Reactive Gasses

132.

Which group of element is the most reactive?

a)

Group 4

b)

Group 1

c)

Group 9

d)

Group 18

133.

The reactivity of an Atom increases by?

a)

going down

b)

Going up

c)

Going Left

d)

Going Right

134.

How is the Periodic Table arranged ?

a)

Atomic Mass

b)

Neutrons

c)

Electrons

d)

Atomic Number

135.

Which planet would be the most likely place to observe for life?

a)

A

b)

B

c)

C

d)

D

136.

Which of the following conditions are absolutely necessary for a planet to support life?

a)

All must be present for a planet to support life

b)

I, II, and IV

c)

II and III

d)

II, IV, and V

137.

Which characteristic of earth is most responsible for its ability to support life?

a)

carbon dioxide present in the atmosphere

b)

earth is terrestrial

c)

proximity to the sun

d)

presence of ice

138.

Earth and Mars are similar in their proximity to the sun.


Why is Earth capable of sustaining life while Mars is not?

a)

Mars is in the habitable zone, but it is a bit smaller than earth,

making it impossible to support life.

b)

Mars is in the habitable zone, but made of gas instead of rock, making it impossible to support life.

c)

Mars is in the habitable zone, but is a bit further from the sun than earth, making it too cold to support life.

d)

Mars is in the habitable zone, but it is a bit further from the sun than earth, making it too hot to support life.

139.
What is the most important factor that determines Earth’s temperature?
a)
Distance to the Moon
b)
Gas composition of the atmosphere
c)
Proximity to the Sun
d)
Amount of water on the planet
140.
What data could be collected, that gives scientists info about if life exists on that planet?
a)
The number of other planets in the system
b)
How long the planet takes to rotate
c)
The orbit length of the planet
d)
The presence of an atmospheric ozone layer

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