Y8 - topic 2 - lesson 4: Signs of a chemical reaction

Which of the following is NOT a sign of chemical reaction?

• Fizzing (effervescence)

• Colour change

• Change in temperature

• Melting

Which of the following is NOT a sign of chemical reaction?

• Appearance or disappearance of solids

• Colour change

• Evaporation

• Absorption or release of energy

Which of the following IS a sign of chemical reaction?

• Appearance or disappearance of solids

• Melting

• Evaporation

• Dissolving

Which of the following IS a sign of chemical reaction?

• Change in temperature

• Freezing

• Evaporation

• Sublimation

The 5 signs of a chemical reaction are: ________, colour changes, changes in temperature, absorption or release of light and the appearance or disappearance of solids.

The 5 signs of a chemical reaction are: fizzing (effervescence), __________ changes, changes in smell, absorption or release of energy (which includes temperature changes) and the appearance or disappearance of solids.

The 5 signs of a chemical reaction are: fizzing, colour changes, changes in _____, absorption or release of energy and the appearance or disappearance of solids.

The 5 signs of a chemical reaction are: fizzing, colour changes, changes in smell, absorption or release of ______ (which includes temperature changes) and the appearance or disappearance of solids.