Sci Investigations
Earth & Space Systems
Ecosystems
Life Systems
Force, Motion, Energy & Matter
100
What is the mass of the rock?
335.6 g
350.6 g
354.6 g
356.0 g
354.6 g
100
During which phase does the Moon receive sunlight only on the side facing away from Earth?
Full Moon
New Moon
Waning gibbous
Waxing gibbous
New Moon
100
Plants release oxygen into the air as a result of photosynthesis. Which of these do plants need for photosynthesis?
Carbon dioxide
Nitrogen
Methane
Hydrogen
Carbon dioxide
100
Which of these best completes the statement about the interaction of the respiratory system with the circulatory system? The lungs add —
nutrients to the blood
bile to the blood
oxygen to the blood
carbon dioxide to the blood
oxygen to the blood
100
Which of the following is an example of static electricity
A dry-cell battery connected to wires lights up a light bulb.
A balloon sticks to a wall after it is rubbed with a piece of wool.
A magnet sticks to a refrigerator door made of metal.
A light switch that is turned on runs a ceiling fan.
A balloon sticks to a wall after it is rubbed with a piece of wool.
200
A student wanted to test the hypothesis that adding antifreeze to water lowers the freezing point of water. The student found that pure water froze at 0ºC, while the water/antifreeze mixture froze at -20ºC. In order to confirm the results, the student should repeat the experiment using —
a container of a different size
a different amount of antifreeze
a different amount of water
exactly the same set-up as the first experiment
exactly the same set-up as the first experiment
200
What is one advantage of using a hydroelectric plant?
It is expensive to build.
It provides renewable energy to human populations.
It has little effect on water flow.
It has little effect on wildlife when being constructed.
It provides renewable energy to human populations.
200
Of the following, which is the correct progression in the food chain?
Producers → herbivores → carnivores
Herbivores → producers → carnivores
Producers → carnivores → herbivores
Carnivores → herbivores → producers
Producers → herbivores → carnivores
200
Which of the following do typical plant cells have that typical animal cells do not?
Cytoplasm
Nuclei
Mitochondria
Chloroplasts
Chloroplasts
200
Which energy transformation occurs first in a coal-burning power plant?
Chemical energy to thermal energy
Thermal energy to mechanical energy
Thermal energy to electrical energy
Mechanical energy to electrical energy
Chemical energy to thermal energy
300
The picture shows a test for non-slip surfaces to be used on a ramp. Which of these must be done to provide more meaningful results?
Use the same shoe on each surface
Use boards of the same thickness
Use the same shoe size for each type of shoe
Use shoes with soles designed for sports
Use the same shoe on each surface
300
Which of the following best describes why the Moon orbits Earth?
The distance the Moon and Earth are from the Sun
The energy reflected from the surface of Earth
The winds generated on Earth by the energy of the Sun
The gravitational attraction between the Moon and Earth
The gravitational attraction between the Moon and Earth
300
During the process of evaporation, liquid water becomes —
tiny drops of water
separate atoms of water
molecules of water vapor
atoms of hydrogen and oxygen
molecules of water vapor
300
Most of the hereditary information within the cell is carried in the —
Ribosomes
Vacuoles
chromosomes
Golgi bodies
chromosomes
300
How is the modern model of an atom different from the Bohr atomic model?
The masses of the atomic particles are different.
The numbers of electrons are different.
The shapes of the nuclei are different.
The arrangements of the electrons are different.
The arrangements of the electrons are different.
400
A student predicts that more sugar will dissolve in warm water than in cold water. She puts some water in a container, adds sugar, and then stirs. The amount of undissolved sugar is then observed. When this student repeats the experiment to verify her prediction, the only thing that should change is the —
amount of water used
temperature of the water
amount of sugar used
amount of time stirring
temperature of the water
400
Venus, the moon, Mars, and the sun are all visible in our sky. All but one of these reflect light from another source. Which of the following produces its own light?
Venus
The moon
Mars
The sun
The sun
400
A tick that feeds on the blood of animals is a
Predator
Host
Competitor
Parasite
Parasite
400
During mitosis, the doubling of chromosomes ensures that both new cells —
have identical genetic makeup
are twice the size of the parent cell
serve different functions
remain attached to each other
have identical genetic makeup
400
During a fireworks show, a family sees the spray of sparkles from an exploding firework high in the sky and, a moment later, hears the pop. Which of these best explains why the pop and spray do not seem to occur at the same time?
Light and sound travel through air.
Sound travels through a vacuum.
Sound travels slower than light.
Light and sound travel at the same speed.
Sound travels slower than light.
500
Which of these would be different for an object if measured on the Earth and on the moon
Mass
Weight
Volume
Density
Weight
500
What most likely happened to species that are found in the fossil record but have no living members?
They had offspring of a different species.
They mutated to other species.
They became extinct.
They never really existed.
They became extinct.
500
In which biome would you find the most variety of life?
Tundra
Desert
Grassland
Rain forest
Rain forest
500
Asexual reproduction involves only one parent. The offspring of this type of reproduction have —
DNA identical to the DNA of the parent
DNA that is different from the parent
one-half of the DNA of the parent
DNA that is incomplete
DNA identical to the DNA of the parent
500
Water stored behind a dam is an example of what type of energy?
Kinetic
Potential
Solar
Chemical
Potential
600
This experiment was set up to test the hypothesis that plants grow faster in green light. What is the independent variable in this experiment?
Type of plant
Amount of water
Color of light
Size of pot
Color of light
600
As the energy needs for Virginia increase, new sources of energy are required to replace or supplement the nonrenewable sources of energy now in use. Two sources of energy that are renewable and available in Virginia are —
natural gas and wind power
coal and hydropower
petroleum and solar power
wind power and solar power
wind power and solar power
600
The presence of permafrost is a characteristic of which major biome?
Tundra
Taiga
Temperate forest
Grasslands
Tundra
600
Which of these processes helps extract energy from food?
Reproduction
Digestion
Excretion
Circulation
Digestion
600
In the diagram, what essential part of an electric circuit is missing at position X?
Load
On/off switch
Wires
Source of electric current
Source of electric current
700
A student conducted an experiment on plant growth that required adding about one cupful of liquid fertilizer to several plants each week. In order to accurately measure the fertilizer given to each plant, the fertilizer volume should be measured in —
cubic meters
milliliters
cubic feet
kiloliters
milliliters
700
Clouds are formed when millions of drops of water become suspended in the air. Which of the following is a step in the process of cloud formation?
Expansion of cold air
Formation of carbon dioxide
Condensation of water vapor
Breakdown of atmospheric ozone
Condensation of water vapor
700
Which of these illustrates a predator-prey relationship?
An eagle catching a fish
A flea feeding on a dog
A horse eating grass
A rooster fighting another rooster
An eagle catching a fish
700
In this plant cell, which cellular structure is responsible for storing food, water, and wastes
Cytoplasm
Vacuole
Nucleus
Cell membrane
Vacuole
700
When a base is mixed with an acidic solution, neutralization occurs because the —
base reaches absolute zero
acid evaporates
base chemically reacts with the acid
mass of the solution increases
base chemically reacts with the acid
800
The picture shows the growth curve of a bacterial population. According to this information, the bacterial population doubles every —
3 minutes
20 minutes
30 minutes
60 minutes
20 minutes
800
Which of the following is a nonrenewable energy source?
Solar collector
Wind turbine
Fossil fuel
Hydroelectric generator
Fossil fuel
800
When animals hibernate, their heart rate and respiration decrease and they lose consciousness. Why do some animals hibernate?
To increase their body fat during cold periods
To conserve energy usage during the winter
To give their fur time to grow longer and thicker
To rest after a summer of high activity
To conserve energy usage during the winter
800
Which process is the foundation for the food web?
Evaporation
Condensation
Photosynthesis
Movement
Photosynthesis
800
The diagram above shows a block from the periodic table. The number six represents the —
atomic mass of the element carbon
atomic number of the element carbon
number of neutrons in the element carbon
number of valence electrons in the element carbon
atomic number of the element carbon