Question 1

Buffelgrass is an invasive species of grass from Africa that outcompetes native Texas grasses for space and water. Which long-term change to a Texas grassland would most likely occur due to the introduction of buffelgrass?

Accepted Answer

The population of native grasses will decrease.

Answer

Buffelgrass offspring will develop traits like those of other invasive species.

Answer

Buffelgrass offspring will develop traits like those of native grasses.

Answer

The population of native grasses will increase.

Question 2

Farmers can best reduce negative effects on the water quality of nearby streams and lakes by planting crops that —

Accepted Answer

need less fertilizer

Answer

need less solar energy

Answer

produce less oxygen

Answer

produce less carbon dioxide

Question 3

A Texas Gulf Coast energy pyramid is shown with representative organisms at each trophic level.

Which statement best describes the flow of energy through this pyramid?

Accepted Answer

The trophic level represented by redfish and flounder receives energy directly from the secondary consumers.

Answer

The trophic level represented by wire grass and phytoplankton receives energy directly from the primary consumers.

Answer

The trophic level represented by shrimp and copepods receives energy directly from the tertiary consumers.

Answer

The trophic level represented by catfish and gobies receives energy directly from the producers.

Question 4

What function do both cell membranes and cell walls perform?

Accepted Answer

Allowing water to move into and out of cells

Answer

Producing energy for cellular processes

Answer

Directing the reproduction of the cell

Answer

Synthesizing genetic material

Question 5

Which of these observations is an indication that a chemical reaction has occurred?

Accepted Answer

A solid forms when two clear solutions are mixed.

Answer

Sugar crystals form on the sides of a boiling pot of sugar water.

Answer

Steam forms above boiling water.

Answer

A solid forms when a clear solution is frozen.

Question 6

Which statement best explains why the sun appears brighter to people on Earth than any other star?

Accepted Answer

The sun is closer to Earth than any other star.

Answer

The sun burns at a higher temperature than any other star.

Answer

Sunlight reaches Earth’s atmosphere at an angle that causes the sun’s light rays to intensify.

Answer

Unique chemical reactions in the sun’s core produce a high-energy wavelength of light.

Question 7

The diagram shows how a cylinder in a car engine causes the car to move.

Which description of the energy conversions in this process is correct?

Accepted Answer

The chemical energy in the fuel-air mixture is converted to thermal energy, which is then converted to mechanical energy.

Answer

The mechanical energy in the fuel-air mixture is converted to electrical energy, which is then converted to thermal energy.

Answer

The electrical energy in the fuel-air mixture is converted to mechanical energy, which is then converted to thermal energy.

Answer

The thermal energy in the fuel-air mixture is converted to electrical energy, which is then converted to mechanical energy.

Question 8

The model shows Earth in four different positions in its orbit around the sun.

Which statement correctly explains which position of Earth represents summer in the United States?

Accepted Answer

Position 2, because the Northern Hemisphere tilts toward the sun

Answer

Position 3, because Earth is at its closest point to the sun in its orbit

Answer

Position 1, because the Western Hemisphere is facing the sun

Answer

Position 4, because Earth is traveling at its fastest rate in its orbit

Question 9

The speed of an object over time is shown in the graph.

Which table describes the object’s motion?

Accepted Answer

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Answer

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Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/b3a40b71b52d07c12041acc52385bdac7b4ee83d.png

Answer

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Question 10

Humans depend upon food that comes from the ocean. Some human activities negatively impact these food supplies.

Which statement provides the best evidence that human activities contribute to this impact?

Accepted Answer

Humans catch marine fish at a faster rate than the fish are able to reproduce.

Answer

Humans raise fish in a hatchery for commercial sale.

Answer

Human visitors to coral reef systems break corals growing on rocks.

Answer

Humans construct artificial reefs to attract tourists.

Question 11

Sea anemones and clown fish live together in the ocean. Which statement best describes one way sea anemones depend on clown fish for an abiotic factor in an ecosystem?

Accepted Answer

Clown fish move water near sea anemones when dissolved oxygen levels are low.

Answer

Clown fish consume the remains of organisms paralyzed by sea anemones.

Answer

Clown fish protect sea anemones from predatory fish.

Answer

Clown fish decrease competition among sea anemones.

Question 12

Two oceanic plates are shown in the image.

Which type of boundary results in the spreading of the oceanic ridge?

Accepted Answer

Divergent boundary

Answer

Convergent boundary

Answer

Subduction boundary

Answer

Transform boundary

Question 13

Students performed a lab investigation on chemical reactions. The students put on goggles and plastic gloves and then followed these steps.

Which observation would indicate that a chemical reaction occurred?

Accepted Answer

The temperature of the vinegar increased during step 4.

Answer

The steel wool sank into the vinegar in step 3.

Answer

The vinegar took the shape of the container in step 1.

Answer

The steel wool changed shape during step 6.

Question 14

A Texas Gulf Coast food web is shown.

According to this food web, which organisms would the bobcat and diamondback rattlesnake compete for if the mouse population and swamp rabbit population decreased?

Accepted Answer

Sparrow and Eastern cottontail rabbit

Answer

Raccoon and sparrow

Answer

Sparrow and seeds

Answer

Raccoon and Eastern cottontail rabbit

Question 15

The chart shows properties of four elements.

Based on these properties, which element is most likely a nonmetal?

Accepted Answer

Element 2

Answer

Element 1

Answer

Element 4

Answer

Element 3

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