Mix 1
Mix 2
Mix 3
Mix 4
Mix 5
100
Which statement describes a reason scientists might use a programmed glider instead of a submarine with a crew to study the bottom of an ocean trench?
Sunlight causes temperatures there to rise dangerously.
B. The low salinity there could harm human passengers.
C. The high density of plant growth there is difficult to navigate.
D. High pressures there could crush a submarine.
D. High pressures there could crush a submarine.
100
A certain kind of weather happens in Dallas, Texas, one day. A similar kind of weather is seen about a day later in St. Louis, Missouri. Another day after that, the same kind of weather appears in Pittsburgh, Pennsylvania.
Which kind of wind is most likely responsible for the movement of this weather system from Dallas to St. Louis and then to Pittsburgh?
Southern polar easterlies
B. Northern polar easterlies
C. Westerlies
D. Trade winds
C. Westerlies
100
Why do scientists use microscopes to study cells?
A. Because cells can be studied only after they have died
B. Because it is quite rare to find living things that are made of cells
C. Because most cells are too dangerous to view without protection
D. Because most cells cannot be seen without magnification
D. Because most cells cannot be seen without magnification
100
The photo shows green moss growing on a rock.
Which term describes the group of plants that mosses belong to?
A. Vascular
B. Pollinating
C. Nonvascular
D. Flowering
C. Nonvascular
100
In which kingdom do the cells of all organisms lack cell walls?
A. Fungi
B. Archaea
C. Animalia
D. Plantae
C. Animalia
200
A convergent boundary is a location where tectonic plates move toward each other.
Which feature of the ocean floor is caused by one tectonic plate moving under another at a convergent boundary?
A. A continental shelf
B. A trench
C. A mid-ocean ridge
D. A flat plain
B. A trench
200
What is a natural depression filled with standing freshwater called?
A. A pond
B. A sea
C. A tributary
D. A stream
A. A pond
200
Which statement explains how a cell part helps a cell get nutrients?
A. The contractile vacuole squirts excess water out of the cell.
B. A transport protein helps waste molecules leave the cell.
C. The nucleus provides the instructions for making proteins from amino acids.
D. A food vacuole merges with a lysosome.
D. A food vacuole merges with a lysosome.
200
How do body cells in multicellular organisms reproduce?
A. Through mitotis
B. Through sexual reproduction
C. Through gamete fusion
D. Through meiosis
A. Through mitotis
200
The photo shows the leaves from one type of vascular plant. Use the dichotomous key to identify the type of plant that has these leaves.
What is the name of the plant that has these leaves?
A. English oak
B. Fir
C. Cactus
D. Elm
D. Elm
300
How does the temperature of the stratosphere change when altitude increases?
A. The temperature increases.
B. The temperature decreases.
C. The temperature stays the same.
D. The temperature changes randomly.
A. The temperature increases.
300
Which event is most likely to lead to a heat wave?
A. A high-pressure system colliding with a low-pressure system
B. An extremely low-pressure system moving into an area
C. A high-pressure system lingering over an area
D. A warm, moist air mass moving over a cooler air mass
C. A high-pressure system lingering over an area
300
Which statement describes a species adapting to changes in its environment?
A. Light-colored moths are hard to see on light-colored tree trunks.
B. Tree trunks turn dark when people burn large amounts of coal.
C. Large numbers of dark-colored and light-colored moths hatch in forests each year.
D. Dark-colored moths become common after tree trunks become dark.
D. Dark-colored moths become common after tree trunks become dark.
300
Which sequence of events summarizes how multicellular animals get energy and nutrients for growth, movement, healing, and other activities?
A. Absorb sunlight → Take in inorganic molecules → Make food
B. Eat food → Digest food → Use nutrients from food
C. Use nutrients from sunlight → Make food → Digest food
D. Digest food → Use nutrients from food → Eat food
B. Eat food → Digest food → Use nutrients from food
300
Which two statements must be true to define a species?
- Organisms must be found in the same place on Earth.
- Organisms must be able to produce offspring that can also reproduce.
- Organisms must have very similar DNA.
- Organisms must be a common ancestor to another organism.
- Organisms must be able to produce offspring that can also reproduce.
- Organisms must have very similar DNA.
400
What do large-scale convection currents create?
A. Local winds
B. Global winds
C. Sea breezes
D. Land breezes
Global winds
400
Which three processes do the cells of this plant perform as it changes from a seed to the young plant shown?
- They increase in number.
- They take in nutrients.
- They increase in size.
- They replace some of their DNA
- They increase in number.
- They take in nutrients.
- They increase in size.
400
The graph shows temperature anomalies for Earth over a 140-year period. A temperature anomaly is a variation from the average temperature. A positive temperature anomaly indicates a temperature that is higher than average.
What conclusion can you draw from the information shown in the graph?
A. Temperature is the only aspect of climate that is changing.
B. Global temperatures are increasing due to human activity.
C. Earth is currently experiencing a period of global warming.
D. Global temperatures are increasing due to natural causes.
C. Earth is currently experiencing a period of global warming.
400
The picture shows a model of a cell.
What is the main function of the cell part labeled Y in the model?
A. To use energy from sunlight to make sugars
B. To hold and protect the cell's DNA
C. To provide cells with energy for their activities
D. To store enzymes that break down food
To store enzymes that break down food
400
The chart lists five common animals and the phylum each one belongs to. These phyla are classified into two larger groups based on how their early embryos look.
Which pair of animals are least closely related based on these data?
A. Sea cucumber and snake
B. Squid and centipede
C. Snake and earthworm
D. Earthworm and centipede
C. Snake and earthworm
500
Based on the pressure data shown in the weather map, in which area are you most likely to see strong winds?
A
B. B
C. C
D. D
B
500
What are two ways engineers could directly protect people from the effects of severe weather?
- Design stronger tornado shelters for the central United States.
- Build generators that can operate for many days without needing more fuel.
- Make sure that summer temperatures stay low.
- Plan and build new parks in areas that experience hurricanes.
- Design stronger tornado shelters for the central United States.
- Build generators that can operate for many days without needing more fuel.
500
The Gulf Stream is a surface current that carries water to the northern Atlantic Ocean. It travels along the eastern United States before crossing the Atlantic Ocean.
Which two locations have climates warmed by the Gulf Stream?
- The western coast of the United States
- Northern Europe
- The eastern coast of the United States
- The southwestern coast of Africa
- Northern Europe
- The eastern coast of the United States
500
This cell is dividing into two new cells.
Which two statements describe the two new cells?
- Each new cell has a unique combination of genes.
- Each new cell carries genetic information that is the same as what was in the original cell.
- Each new cell is genetically identical to the other.
- Each new cell contains genetic information that is different from what was in the original cell.
- Each new cell carries genetic information that is the same as what was in the original cell.
- Each new cell is genetically identical to the other.
500
The photo shows an adult frog.
Which two statements describe what happened to this frog as it changed from a tadpole to an adult frog?
- The size of each cell in its body decreased.
- Its cells became specialized to do specific jobs.
- Its cells joined together to form jellylike balls.
- The number of cells in its body increased.
Its cells became specialized to do specific jobs.
The number of cells in its body increased.