Useful and Harmful causes of changes

A phase change that enables us to preserve meats and other foods is __________.

• Melting

• Condensation

• Evaporation

• Freezing

A phase change that enables us to mold cans and utensils is __________.

• Melting

• Condensation

• Evaporation

• Freezing

A phase change that enables us to recycle and purify water is __________.

• Melting

• Condensation

• Evaporation

• Freezing

Give at least 3 benefits we get from chemical change

Which of the following is the benefit plants get from Chemical change

• Digestion

• Photosynthesis

• Lightning

• Decomposition

What do we call the introduction of harmful chemicals to the environment?

• Global Warming

• Acid Rain

• Pollution

_______ includes dust, ash, soot, and leads.

• Particulates

• Carbon Monoxide

• Lead

___________ is released from the exhaust of vehicles that use lead gasoline. 

• Particulates

• Carbon Monoxide

• Lead

___________– is by-product of burning fuel.

• Particulates

• Carbon Monoxide

• Lead

Choose all the chemicals mixed into water droplets and cause acid rain.

• Carbon Dioxide

• Sulfur Oxide

• Nitrogen Oxide