Classifying Matter STAAR Prep

A student puts four objects in a bucket filled with water. The objects are:

Metal Spoon- Wooden Block - Rubber Duck - Glass Marble

Which two objects are most likely less dense than the water?

• A. Metal spoon and Wooden block

• B. Rubber duck and Glass marble

• C. Metal spoon and Glass marble

• D. Rubber duck and Wooden block

Which of the following objects does not conduct electricity?

• Cotton ball

• Metal spoon

• Salt water

• Graphite

Students placed three objects in a tank of water. Which of the following can be concluded based on the results?

• The green ball is more dense than the orange ball.

• The orange ball is less dense than the purple ball.

• The purple ball is less dense than the orange ball.

• The green ball is more dense than the orange ball and the purple ball.

When a solid changes to a liquid, this is an example of

• Melting

• Freezing

• Condensation

• None of these

When a gas changes to liquid, this is an example of

• Melting

• Freezing

• Condensation

• None of these

Boiling water was placed in containers made of four different materials. Based on the data, which material was the best insulator of heat?

• Material 1

• Material 2

• Material 3

• Material 4

Water on the surface of Earth changes to water vapor. What process causes water vapor?

• Evaporation

• Melting

• Freezing

• Condensation

Water on the surface of Earth changes to water vapor. What condition causes the water vapor?

• Cooling

• Heating

• Sinking

• Floating

What happens to the mass of substances when they are mixed to form a solution?

• The mass decreases.

• The mass increases.

• The mass stays the same.

• The mass disappears.

A student classifies the objects shown based on their physical properties. Which property cannot be used to classify these objects into more than one group?

• A. Magnetism

• B. Mass

• C. Electrical conductivity

• D. Solubility in water