2022 Released Science STAAR: Q31-36

A student poured equal amounts of water and cooking oil into a jar. The student placed a lid on the jar and shook the mixture for five seconds and then let the jar sit for ten minutes. The results of this investigation are shown.

Which conclusion best compares a property of cooking oil and water shown in this investigation?

• Cooking oil is less dense than water.

• Water is less dense than cooking oil.

• Water dissolves in cooking oil.

• Cooking oil dissolves in water.

Tags

5.5A

Many of America’s large oil fields are found underground at the Permian Basin in West Texas. An area of the Permian Basin is shown.

How did these oil fields form?

• Dead plants and animals were buried for millions of years.

• Plants were eaten by consumers that left fossilized remains.

• Heat caused underground rocks to go through chemical changes.

• Rocks at the surface of the Earth melted and then solidified.

Tags

5.7A

Students build a balloon-rocket car using a balloon, a straw, a water bottle, and some tape. When the straw is released by a student, the air from the balloon comes out. A diagram of the car is shown.

Which statement best describes the motion of the car when the straw is released?

• The car will move away from the wall in the same direction as the air that is leaving the balloon.

• The car will move toward the wall because of the force of the air from the straw.

• The car will move fast because the straw gets light as the air is released.

• The car will not move because the air escapes from the balloon.

Tags

3.6B

Students observe some objects on a lab tray. The students will classify the objects based on physical properties common to all of the objects.

Based on their common properties, how should these objects be classified?

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Tags

5.5A

Crested floating heart is a non-native plant that now grows in Texas. This plant grows very fast and can spread over the entire surface of a pond or lake. Which effect will most likely occur when crested floating heart covers a lake?

• Small fish will have fewer places to hide from predators.

• Less sunlight will reach the plants that grow underwater.

• Several new trees will grow along the lake shore.

• Deer will have to find another source of water.

Tags

5.9C

Students conduct experiments to investigate friction. Which experiment will best test the effect of friction on objects?

• Drop two balls from the same height at the same time

• Roll two marbles on the carpet from the same starting point at the same time and with the same amount of force

• Roll three marbles across three different surfaces from the same starting point at the same time and with the same amount of force

• Release two balls from the top of a ramp at the same time

Tags

5.6D