Which action shows concern for the environment with regards to the resources of the oceans?

setting limits on fish harvesting in the oceans

What effect does the water cycle have on the total amount of water on Earth

The total amount of water on Earth remains relatively constant.

Which would indicate the water in a lake is not safe for drinking?

high turbidity levels in the lake

Which is most likely a major concern associated with burning fossil fuels?

Burning fossil fuels can produce smog, which can cause respiratory probs.

Which evidence supports the idea that life on Earth has continually evolved?

evidence from rock layers, fossils, and ice cores

Which is one possible human benefit from biotechnology research?

producing crops that can grow in areas where they normally do not grow

Which best represents the flow of energy within an aquatic ecosystem?

sunlight → algae → insects → fish → turtle

If a company genetically modifies corn to emit an odor that repels insects, which describes how the corn was modified?

by techniques used in biotechnology

Geologist identifies the same index fossil is rock layers from two different areas Which conclusion is best supported

The two rock layers were deposited at approximately the same time.

Which will most likely happen to Questors as a result of Wood Plaxers migrating to their habitat

The two species will coexist with no competition

Table shows energy production from fossil fuels over a 20-year period. Which conclusion is best supported by the data?

Dependency on oil has increased so energy production from oil is increasing

Which statement is true about a chemical reaction?

All of the atoms in the reactants will be a part of the products

If a lake has excess levels of phosphates and nitrates in its water, what will most likely result?

The growth of algae in the lake will increase

Which best explains why all of the Earth’s freshwater is not available for human use?

Most of Earth’s freshwater is frozen water.

Which is the best evidence for evolution

old rock layers containing fossils unlike existing organisms

Which demonstrates how genetic variation may result from a change in the environment where an animal lives?

fox changes its color over time bc migrates to area with different climate

H2CO3→ H2O + CO2 How does the reaction support the Law of Conservation of Mass?

Mass of atoms in the reactant equals the mass of the atoms in the products

How can biotechnology help farmers overcome sudden changes in the global climate?

By developing crops that are resistant to adverse weather

How has biotechnology helped improve the agricultural industry?

By creating some crops that resist certain insects

Recent changes in species can be found in upper layers of rock. This provides a link between which two scientific ideas

the theory of evolution and the Law of Superposition

If a bat, an alligator, and a bird evolved from a common ancestor, what most likeley can be concluded?

They have similar anatomical structures

How can the agricultural biotechnology industry have a positive impact on the environment?

by reducing the need for countries to import food

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8th Grade Release

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Answers

1
What does the image represent in determining water quality?
dissolved oxygen levels
pH
bioindicators
turbidity
2
Which is the primary source of energy for most cells in the body?
sugar
vitamin
fat
protein
3
Which will most likely result if there is increased upwelling in a coastal area?
higher water temperatures
more aquatic life
less nutrients in the water
fewer nitrates
4
What would have the greatest long-term impact on reducing the amount of carbon dioxide in the air?
decreasing the number of livestock on a farm
increasing the number of livestock on a farm
planting trees around a farm
cutting down trees around a farm
5
Which action shows concern for the environment with regards to the resources of the oceans?
setting limits on fish harvesting in the oceans
allowing factories to release untreated wastewater into the oceans
filling in oceanfront wetlands in order to extend beachfront properties
developing technology which will allow for an increase in fish harvesting
6
Which chemical equation best represents the Law of Conservation of Mass?
2H2 + O2→ 2H2O
H + O → H2O
H2 + O2→ H2O
H2 + O2→ 2H2O2
7
Where is most of Earth’s freshwater located
Rivers
Glaciers and Ice Sheets
Lakes
Underground
8
What effect does the water cycle have on the total amount of water on Earth
Total amount of water Earth changes during periods of warming and cooling
The total amount of water on Earth remains relatively constant.
The total amount of water on Earth is constantly decreasing
The total amount of water on Earth is constantly increasing
9
Which would indicate the water in a lake is not safe for drinking?
high dissolved-oxygen levels in the lake
cold water temperature of the lake
many varieties of fish in the lake
high turbidity levels in the lake
10
Which is the best way to help prevent the flu from becoming a pandemic?
getting a vaccination
taking antibiotics
eating fruits and vegetables
washing hands often
11
Which is the best example of a chemical change
paper tearing
eggs cooking
water evaporating
butter melting
12
Which is most likely a major concern associated with burning fossil fuels?
Burning fossil fuels can remove carbon dioxide from the atmosphere.
Burning fossil fuels can pollute the oceans.
Burning fossil fuels can remove harmful chemicals from precipitation.
Burning fossil fuels can produce smog, which can cause respiratory probs.
13
Which evidence supports the idea that life on Earth has continually evolved?
evidence gathered from melting glaciers
evidence from layers of tree rings
evidence that the climate has changed over the past 100 years
evidence from rock layers, fossils, and ice cores
14
Help support evidence that organisms derived from a common ancestor.
homologous structures
evolutionary structure
anatomy listings
analogous structure
15
Gold, oxygen, silver and nitrogen are examples of
alloys
elements
mixtures
compounds
16
Which is one possible human benefit from biotechnology research?
producing crops that can grow in areas where they normally do not grow
producing new types of disease-causing viruses
creating new types of buildings that can withstand hurricanes
increasing the ability to turn ocean water to freshwater
17
Which best represents the flow of energy within an aquatic ecosystem?
sunlight → insects → algae → fish → turtle
insects → algae → fish → turtle → sunlight
sunlight → algae → insects → fish → turtle
algae → insects → fish → turtle → sunlight
18
In the food chain, who is the producer?
grass
grasshopper
snake
hawk
19
Which pair of elements has the most similar properties?
Li and B
O and S
K and He
I and Ca
20
Which allows scientists to investigate what Earth’s climate was like over the past 740,000 years
faults
volcanic deposits
ice cores
fossils
21
Used for muscle development, growth, rebuilding and repairing cells, organelles, and tissues.
proteins
lipids
fiber
carbohydrates
22
If a company genetically modifies corn to emit an odor that repels insects, which describes how the corn was modified?
by harvesting at different times
by techniques used in biotechnology
by chemical exposure
by crop rotation techniques
23
Which is the most accurate way of determining the age of a fossil?
dating index fossils
radioactive dating
dating the rock layers above the fossil
relative dating
24
Geologist identifies the same index fossil is rock layers from two different areas Which conclusion is best supported
The index fossil also occur in sediment deposited top of these rock layers
The deposition rate of the two rock layers was identical
The fossil organism evolved independently in the two separate areas
The two rock layers were deposited at approximately the same time.
25
The smallest nonliving organism
yeast
bacteria
fungi
virus
26
Scientists have caused some bacteria to produce insulin. Which area of science would these scientists most likely work
biotechnology
marine biology
chemistry
nuclear engineering
27
Which will most likely happen to Questors as a result of Wood Plaxers migrating to their habitat
The Questors will compete with the Wood Plaxers for food resources
The Questors will be forced to fly to a different habitat
The two species will become extinct
The two species will coexist with no competition
28
Which is classified as an element?
water
carbon dioxide
vinegar
iron
29
Table shows energy production from fossil fuels over a 20-year period. Which conclusion is best supported by the data?
Dependency on coal increased so energy production from coal is increasing
Dependency on coal increased so energy from natural gas is decreasing
Dependency on oil has increased so energy production from oil is increasing
Dependency on oil increased so energy from natural gas is decreasing
30
Which statement is true about a chemical reaction?
The number of atoms in the reactants determines the products
The physical states of the atoms in the reactants determine the products
Some of the atoms in the reactants will be a part of the products
All of the atoms in the reactants will be a part of the products
31
If a lake has excess levels of phosphates and nitrates in its water, what will most likely result?
The turbidity levels of the lake will decrease
The temperature of the lake water will decrease
The dissolved-oxygen levels in the lake will increase.
The growth of algae in the lake will increase
32
Which best explains why all of the Earth’s freshwater is not available for human use?
Most of Earth’s freshwater is still in the water cycle.
Most of Earth’s freshwater is underground.
Most of Earth’s freshwater is frozen water.
Most of Earth’s freshwater is only in lakes.
33
Rows in the periodic table are called:
groups
periods
families
alkalis
34
Which is the best evidence for evolution
old rock layers containing fossils unlike existing organisms
new rock layers containing fossils unlike existing organisms
new rock layers containing fossils of simple organisms
old rock layers containing fossils of complex organisms
35
Which demonstrates how genetic variation may result from a change in the environment where an animal lives?
A salmon swims faster as it enters colder waters.
fox changes its color over time bc migrates to area with different climate
snake increases body temp bc it moves on top of a rock in direct sunlight.
beetle stands out to predators bc it does not blend with flowers around it
36
H₂CO₃→ H₂O + CO₂ How does the reaction support the Law of Conservation of Mass?
Several molecules of water are produced
Mass of atoms in the reactant equals the mass of the atoms in the products
The mass of carbon atoms is reduced during the reaction.
Mass of H atoms is the only thing that remains the same before and after
37
Which disease could best be treated with antibiotics?
The Flu
Common Cold
HIV
Strep Throat
38
A partially enclosed body of water where fresh and salt water meet and mix
lake
tidal zone
estuary
watershed
39
In this food chain which is the secondary consumer?
Frog
Snake
Grasshopper
Grass
40
How can biotechnology help farmers overcome sudden changes in the global climate?
By rotating the crops within the same field
By only planting crops in the winter
By changing the types of soil in which the crops are planted
By developing crops that are resistant to adverse weather
41
How has biotechnology helped improve the agricultural industry?
By producing soil free of decomposers
By developing machines that help farmers harvest crops faster
By developing irrigation systems that cover a large land area
By creating some crops that resist certain insects
42
Which is a compound?
nitrogen
sugar
air
sodium
43
Recent changes in species can be found in upper layers of rock. This provides a link between which two scientific ideas
cell theory and the theory of evolution
the Law of Superposition and the periodic nature of the elements
the periodic nature of the elements and cell theory
the theory of evolution and the Law of Superposition
44
If a bat, an alligator, and a bird evolved from a common ancestor, what most likeley can be concluded?
They live in the same part of the world
They are able to survive changes in their enviornments
They have similar anatomical structures
They are in the same biological classification
45
Which characteristic of water quality provides the most information regarding the health of a water system?
clarity (turbidity)
concentration of heavy metals
temperature
presence of indicator species
46
Whichtype of infection is best controlled with antibiotics?
fungal
none of these
viral
bacterial
47
Which would most likely increase the genetic variation in a population of organisms?
decreased mutations
decrease in disease
increase mutations
increase in disease
48
Which of these organisms is a producer in a marine ecosystem?
algae
gull
worm
fish
49
Which will most likely result if there is increased upwelling in a coastal area?
more aquatic life
fewer nitrates
less nutrients in the water
higher water temperatures
50
Type of relationship where one benefits;one is harmed
mutualism
parasitism
competition
commensalism
51
How can the agricultural biotechnology industry have a positive impact on the environment?
by making robots to replace farm machines
by reducing the need for countries to import food
BY producing virus resistant crops
by using more wind farms for energy
52
What is the most likely result of overusing a particular antibiotic?
more infections caused by bacteria resistant to the antibiotic
fewer infections caused by bacteria resistant to the antibiotic
fewer infections caused by viruses and bacteria
more infections caused by viruses
53
The table provides info about some group 1 elements. Which is the best estimate of the melting point of Rubidium (Rb)?
184οC
25ο C
75οC
40οC
54
2 liquids are in open container it is determined the mass of the 2 liquids is less Which best describes this observation
Some of the atoms during the reaction became heavier
Some of the atoms during the reaction were destroyed.
Some of the atoms during the reaction changed to a different kind of atom.
Some of the atoms during the reaction escaped into the air.
55
Many infectious diseases have been nearly eliminated worldwide Why should global studies of infectious diseases continue
All infectious diseases are resistant to any form of treatment
All infectious diseases are caused by viruses do not respond to antibiotics
All infectious disease organisms have ability to mutate, adapt, and survive
All infectious disease organism are fatal
56
Which is the best example of a pure substance
steam
gold
human blood
carbon dioxide
57
Cracks in ocean crust that release mineral-rich water that has been heated by Earth’s interior
Volcanic island
Continental slope
Hydrothermal vents
Ocean trench
58
Where do plants get the food they need for energy
They absorb it directly from the sun
They absorb it directly from the soil
They produce it during photosynthesis
They receive it from atmospheric gases
59
Which best determines the health of a lake used as a source of freshwater?
its temperature and depth
its depth and width
its temperture and pH
its location and depth
60
Principle that states that younger rocks lie above older rocks if the layers are undisturbed.
Geologic Column
Fossil
Unconformity
Superposition
61
Which best describes uniformitarianism
Movement of the continents no longer occurs because of changeocean currents
Processes that shape the Earth continue as they have since the Earth formed
Formation of rock layers has slowed because humans have altered environment
The time it takes for erosion to occur has changed since Earth first formed
62
Which is a nonrenewable resource?
sunlight
water
wood
oil
63
Which would least likely have an impact on global climate change?
Producing energy using coal
Producing energy using oil
Producing energy using hydroelectric plants
Producing energy using natural gas
64
Which are the most responsible for creating acid rain pollution?
Wood-burning power plants
Nuclear power plants
Coal-burning power plants
Hydroelectric power plants
65
Which best explains why mammals became dominant after the mass extinction of the dinosaurs?
They were able to hibernate for thousands of years.
They lived in different areas on Earth than dinosaurs.
They had traits that helped them adapt to environmental changes.
They were larger than dinosaurs and ate different foods.
66
Why do doctors suggest people get a flu vaccine each year?
viruses can mutate from year to year
vaccines get stronger over time
viruses replicate more rapidly over time
vaccines are absorbed by the body after a year
67
How would a large increase in the salinity of an estuary most likely affect the ecosystem of the estuary
All organisms would continue to live as they now do
salt-intolerant organism will increase salt-tolerant organism will decrease
salt-tolerant organism will increase salt-intolerant organism will decrease
All organisms will die
68
Type of science that allows altering DNA of plants so it will contain more protein and flavor?
geotechnology
biology
physiology
biotechnology
69
When 2 organisms attempt to use a resource in the same place at the same time
competition
mutualism
parasitism
predator/prey
70
Which supports the theory that some mountains were once at the bottom of an ocean?
Freshwater rivers flow to the ocean.
Both mountains and ocean floors have similar minerals in their rocks.
There are underwater mountains on the ocean floor today.
Fossils of marine organisms are found on the tops of some mountains.
71
In water quality indicators, the cooler the temperature, the greater the presence of :
turbidity
color
fish
dissolved oxygen
72
Dolphins and whales may have evolved from a commonancestor. What evidence supports this?
They both have similiar anatomies
They ate the same food
They swam the same way
They both live in the same ocean area
73
Which best describes method of obtaining energy that may cause changes in water temperature and harm to fish populations
using ethanol in cars
installing solar panels on a home
generating electricity in a hydroelectric power plant
burning coal
74
n which oceanic zone do clams and crabs survive by burrowing in the sand?
oceanic
open ocean
intertidal
deep ocean
75
Which of the following is a fungal infection of the skin?
Parkinson's disease
athlete's foot
cancer
strep throat
76
In ecology, this is called a:
food chain
energy pyramid
food web
life cycle
77
How has genetic engineering helped farming?
by producing soil that makes crops grow better
by creating crops that resist some diseases
by producing faster ways to harvest crops
by developing better fertilizer for crops
78
What are transitional fossils
fossils which show a species at different ages
An organism in the process of being fossilised
Fossils that fill in the gaps of the family tree
Fossils that are being set in plaster for display
79
Which of these would most likely happen to a species that is not able to adapt to a changing environment?
The species would develop resistance to disease.
The species would become extinct over time.
The species would change the environment
The species would develop mutated cells.
80
Which statement best explains how periods on the periodic table are organized?
decreasing number of electrons from left to right
increasing atomic number from left to right
decreasing atomic mass number from ;eft to right
increasing number of neutrons from left to right
81
The sudden outbreak of adisease can be classified as an epidemic or a pandemic depending on:
if it is spread by a bacteria or virus
if it is regional or widespread
if it is transmitted by air or water
by how many people died
82
How are mutualism and parasitism different?
parasitism both benefit mutualism one benefit other not harmed or benefits
mutualism both benefit parasitism one benefits other not harmed or benefit
mutualism both benefit parasitism one benefits other harmed
parasitism both benefit mutualism one benefits other harmed
83
How can upwellings improve fishing for ocean fishermen?
they bring nutrients from the cold, deep ocean waters
the bring ocean currents from the equator
they cause ocean currents to remain calm
they cause the ocean water to get warmer
84
What happens to most of the energy as it moves throughout a food web
It is changed into mass
It is changed into heat energy
It is changed into light energy
It is changed into decomposers
85
Which is the best reason for scientists to study ice cores obtained from Earth’s ice caps?
to study the quality of water stored in glaciers
to evaluate potential oil drilling sites
to study past climates by analyzing trapped gases and particles
to determine the rate of melting in polar regions
86
Movement of cold water upward from deep ocean - brings up nutrients is called:
upwelling
downwelling
water cycle
desalination
87
Chlorine has 7 valance electrons. With what group of elements will chlorine most readily bond
group 1
group 18
group 16
group 2
88
Using the image which of the driving forces of evolution does this represent:
hybridization
genetic engineering
natural selection
color variation
89
An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?
The molecules will begin to increase in density
The molecules will begin to move faster
The molecules will begin to condense in the air
The molecules will begin to move slower
90
Why are digestion and respiration important to the body
They help provide the energy needed for body functions
They build muscle and bone that the body needs
They control the production of hormones in the body
They store food for the body
91
•The change in inherited characteristics of biological populations over successive generations
Theory of Superposition
Theory of Absolute Dating
Theory of Natural Selection
Theory of Evolution
92
How are pandemics different than epidemics?
Pandemics affect many countries; an epidemic is more localized.
A Pandemics affect blood; epidemics affect skin.
Pandemics spread through air; epidemics are spread through the water.
Pandemics are caused by bacteria; epidemics are caused by viruses.
93
A runner is preparing to run a long race. Which would provide the highest level of energy for the runner?
minerals
vitamins
proteins
carbohydrates
94
Which is the most accurate method scientists use to predict the age of Earth?
investigating core samples from the Arctic
comparing the ages of different fossils
radioactive dating of rocks
relative dating of rock layers
95
Process whose products include glucose and oxygen
water cycle
photosynthesis
cellular respiration
both cellular respiration and photosynthesis
96
Which best determines the number of wolves that can live in an area?
the amount of snow in the area each year
the number of trees in the area
the amount of food available in the area
the number of birds that live in the area
97
What is true about the kudzu vine?
example of a pollutant
an invasive species that can change an ecosystem
example of a cyclic change
shows predator prey relationship
98
If wolves prey on deer, what will likely happen to the deer population if wolves are removed
Population of deer will remain the same
Population of deer will become extinct
Population of deer will decrease
Population of deer will increase
99
If chemical reaction begins with 6 carbon atoms how many will be in the products?
3 carbon atoms
12 carbon atoms
2 carbon atoms
6 carbon atoms
100
Nitrogen fixing bacteria attach to these so they can help create ammonia in the nitrogen cycle:
roots of carbon dioxide
roots of soil
roots of reptiles
roots of legumes

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