Changes that Materials Undergo (Presence and Absence Oxygen)

1. Presence or absence of oxygen has various effects such as:

• Rusting

• Oxidation

• Combustion

• Production

2. It begins to eat away metal, forming a flaky orange-red coating that weakens the iron.

• Iron

• Fuel

• Heat

• Rust

3. What is the other name of Rusting?

• steel combustion

• steel corrosion

• steel erosion

• steel conduction

4. What is the other name of Oxidation?

• oxygen

• carbon dioxide

• Enzymatic browning

• fire triangle

5. 3 Components of Fire triangle

• fire, heat, oxygen

• fuel, heat, oxygen

• fuel, heat, carbon dioxide

• fuel, air, carbon dioxide

6. Rust formed when the following react with one another:

• water, rust, carbon dioxide and oxygen

• water, iron, carbon dioxide and oxygen

• water, iron, carbon and oxygen

• water, iron, carbon dioxide and fuel

7. Is a colorless, odorless, and tasteless gas essential to living organisms. It is one of the components in the fire triangle.

• Oxygen

• Carbon Dioxide

• Heat

• Energy

8. Oxygen can be found in: (check all that applies)

• water

• air

• rocks and soil

• ozone layer

9. Our body needs oxygen to convert food to energy.

• true

• false

• no answer

• maybe

10. Presence of oxygen in the air reacts with the chemical components in the inner parts of the fruits and vegetables causing them to change in color

• chemical property

• oxidation

• oxygen

• reactivity property