It is important to protect air quality because

acid rain is caused by air pollution

C + O2 →CO2 According to this equation, what happened to the carbon and oxygen?

They combined chemically to form a new compound.

Car manufacturer reduces the mass of car by 250 kg, how will the new car compare to the old car

It will need less force to move.

Which energy transformation occurs first in a coal-burning power plant?

Chemical energy to thermal energy

How is the modern model of an atom different from the Bohr atomic model?

The arrangements of the electrons are different.

Similar ice cubes melt faster in a microwave than on the stove. How is this hypothesis tested?

Observe & record time for each to change to a liquid.

Harvesting regulations for fish species limit the number & size of fish that may be kept. Why?

To keep a healthy population of adult fish

Which best describes the particle motion taking place as gas is exposed to freezing temp?

The particles decrease in speed.

Human sweat is the direct result of which life functions?

Waste removal and temperature control

Which of the following is an example of static electricity

balloon sticks to wall after it's rubbed with piece of wool

Black bears roam over large territories. What is the effect of building in these territories?

Reduce the black bears’ habitat

The best scientific reason for a scientist to accept a specific theory is —

that research and observations support the theory

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science SOL

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Questions 21

Answers

1
It is important to protect air quality because
acid rain is caused by air pollution
storms worsen as air pollution decreases
wind currents change when the air is polluted
energy produced by the Sun decreases when air is polluted
2
A coal-burning facility is near pond ecosystems. How will it most affect the pond ecosystems?
Water quality will be reduced.
More nutrients will be available.
Disease will become less common.
Organism diversity will increase.
3
C + O₂ →CO₂ According to this equation, what happened to the carbon and oxygen?
They combined physically to form a new element.
They combined chemically to form a new compound.
They combined chemically to form carbon and oxygen.
They combined physically to form a new mixture.
4
Car manufacturer reduces the mass of car by 250 kg, how will the new car compare to the old car
It will release more gas emissions.
It will need less force to move.
It will have a greater gravitational attraction to the road.
It will require more fuel to operate.
5
Which energy transformation occurs first in a coal-burning power plant?
Thermal energy to electrical energy
Thermal energy to mechanical energy
Chemical energy to thermal energy
Mechanical energy to electrical energy
6
How is the modern model of an atom different from the Bohr atomic model?
The shapes of the nuclei are different.
The arrangements of the electrons are different.
The masses of the atomic particles are different.
The numbers of electrons are different.
7
These animals are grouped together because all of them
are aquatic (live in water)
are invertabrates
are autotrophs
are vertabrates
8
Similar ice cubes melt faster in a microwave than on the stove. How is this hypothesis tested?
Determine the volume of liquid water made by each ice cube.
Identify & record the temp. of each before each trial.
Observe & record time for each to change to a liquid.
Measure and compare the volume of the pot and the microwave.
9
Which of the following is an example of potential energy?
A ball rolling along a sidewalk
A glass jar sitting on a shelf
A battery powering a radio
A flag waving in the wind
10
Harvesting regulations for fish species limit the number & size of fish that may be kept. Why?
To have enough fish for zoo aquariums
To keep a healthy population of adult fish
To have people spend more money on fishing
To keep other game fish species populations low
11
Two sources of energy that are renewable and available in Virginia are
petroleum and solar power J
natural gas and wind power
coal and hydropower
wind power and solar power
12
Which characteristic is used to classify frogs into a different phylum from squid and snails?
Frogs have backbones.
Frogs live on land.
Frogs are predators.
Frogs breathe oxygen.
13
Which best describes the particle motion taking place as gas is exposed to freezing temp?
The motion of the particles is unchanged.
The particles decrease in speed.
The motion of the particles becomes random.
The particles move with more force.
14
SI metric unit that is used to record the heat transfer of a solution in an investigation?
Volt
Liter
Newton
Degree Celsius
15
Human sweat is the direct result of which life functions?
Respiration and cellular growth B
Waste removal and temperature control
Reproduction and cellular transport
Digestion and disease prevention
16
During which phase does the Moon receive sunlight only on the side facing away from Earth?
Waxing gibbous
Waning gibbous
New Moon
Full Moon
17
Which of the following is an example of static electricity
dry-cell battery connected to wires lights up a light bulb
balloon sticks to wall after it's rubbed with piece of wool
A light switch that is turned on runs a ceiling fan.
A magnet sticks to a refrigerator door made of metal.
18
All of these can be inherited by people EXCEPT
language
eye color
blood type
height
19
seaweed→fish→sea otter→orca What is the role of the Orca in this food chain?
Second-order consumer
First-order consumer
Producer
Third-order consumer
20
Black bears roam over large territories. What is the effect of building in these territories?
Introduce a new bear population to the area
Stabilize the black bear population
Promote an increase in black bear reproduction
Reduce the black bears’ habitat
21
The best scientific reason for a scientist to accept a specific theory is —
to gain recognition as a great scientist
because there can only be one correct theory
to obtain funding for the research
that research and observations support the theory

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