Science STAAR Released Questions

What most likely happened to the dead plants and animals?

• They were eaten by scavengers.

• G They became fossil fuels.

• H They were washed away by water

• J They became an underground aquifer.

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Based on this information, what is most likely an advantage of the bony fish tail fin over the shark tail fin?

• It is easier for a bony fish to change direction quickly since muscles control the movement of the tail fin.

• The bones in the tail fin help a bony fish sink to lower depths in the water when searching for food.

• The flexible tail fin is fanned by the water, so a bony fish uses less energy to swim.

• The thin spines of the tail fin prevent a bony fish from being seen by larger predator fish.

What property of soils is the student most likely examining with this procedure?

• F The differences in texture between wet and dry soils

• G How well different soils retain water

• H How much water is needed to dissolve different soils

• J The amount of time it takes different soils to dry

Based on their properties, which of the objects is most likely a metal?

• Object , because it is a solid that is less dense than water

• Object 2, because all metals float in water

• Object 2, because metals conduct thermal energy and electricity

• Object1, because it can be used to provide insulation for thermal energy

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In the water cycle, which process involves water vapor cooling and changing into liquid water?

• Evaporation

• Condensation

• Precipitation

• Transpiration

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What is the primary function of the chloroplasts in plant cells?

• To break down sugar molecules to release energy

• To store water and nutrients

• To capture light energy and convert it into chemical energy

• To control the entry and exit of substances in and out of the cell

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What is the process by which plants release water vapor into the air through their leaves?

• Condensation

• Transpiration

• Evaporation

• Precipitation

Which of the following is an example of a physical change?

• Rusting of iron

• Burning of gasoline

• Dissolving sugar in water

• Cooking an egg

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

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What type of symbiotic relationship benefits one organism without harming the other?

• Mutualism

• Commensalism

• Parasitism

• Predation