2Q Week 5 Changes in Materials

Which of the given statements displays a beneficial use of chemical change?

• A chemical change can burn things.

• A chemical change can make metal rusty.

• A chemical change is used in food production.

• A chemical change can make decaying matter smell bad.

Which of the following can cause the bad effect of chemical change on humans?

• Spoiling of food

• Baking of bread

• Molding of metals

• Chemical Digestion

Which of the following is a bad effect of condensation?

• formation of dews in grasses

• formation of fog in the morning

• formation of clouds

• formation of molds on the walls of the house

What happens to an ice cube once it melts?

• The ice cube turns into solid from gas.

• The ice cube turns into gas from liquid.

• The ice cube turns into liquid from gas.

• The ice cube turns into liquid from solid.

The cold drinks that are left on the table are accumulating water droplets outside of their container. What is the most suitable method to describe this event?

• Melting

• Freezing

• Evaporation

• Condensation

What is a positive impact of chemical reactions in agriculture?

• They can lead to soil erosion.

• They can enhance crop growth through fertilizers.

• They can cause water pollution.

• They can create harmful pesticides.

Which of the following practices can help reduce chemical waste?

• Using biodegradable materials.

• Throwing chemicals in the trash.

• Using more plastic products.

• Burning waste materials.

Which of the following is a consequence of excessive use of fertilizers?

• Improved soil quality.

• Increased crop yield.

• Waterway pollution.

• Enhanced biodiversity.

What is a negative consequence of using pesticides in farming?

• Increased crop yield.

• Harm to beneficial insects.

• Improved soil health.

• Enhanced food preservation.

Why is evaporation an important stage in the water cycle?

• The water is cooled.

• The water is recycled.

• The water is changed to solid.

• The water is used for drinking.