Which of the following is an indicator of a chemical change?

• Melting of ice

• Production of a gas

• Dissolving sugar in water

• Breaking a glass

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TEKS.SCI.6.6E

A student mixes two clear liquids in a beaker and observes a color change. What does this observation most likely indicate?

• A physical change

• A chemical change

• A change in state

• A change in mass

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TEKS.SCI.6.6E

When vinegar is added to baking soda, bubbles form. What does this suggest about the reaction?

• It is a physical change

• It is a chemical change

• It is a change in temperature

• It is a change in shape

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TEKS.SCI.6.6E

Which of the following scenarios is most likely to involve the formation of a precipitate?

• Mixing salt and water

• Mixing two clear solutions and observing a solid form

• Melting butter

• Freezing water

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TEKS.SCI.6.6E

A student observes that a reaction between two substances causes the container to become warm. What does this suggest about the reaction?

• It is an endothermic reaction

• It is an exothermic reaction

• It is a physical change

• It is a reversible change

Tags

TEKS.SCI.6.6E