revision on oxygen

Oxygen is a living element that humans and animals require to live. 

• True 
• False

What is the process of plants taking in carbon dioxide and releasing oxygen called?

• Respiration

• Produce

• Photosynthesis

• Breathing

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

________________ could increase the amount of oxygen in the air.

• Building more houses

• Burning more oil

• Paving more streets

• Planting more trees

Tags

NGSS.MS-LS1-6

Animals use oxygen for _____________.

• breathing
• creating food
• making glucose
• transpiration

Tags

NGSS.MS-LS2-3

Oxygen combines with elements to form _____________.

• Oxides

• Mixtures

• Oxidations

Oxygen is the most abundant gas in air.

• True

• False

The rapid combination between oxygen and the elements producing heat and light is called......

• burning

• respiration

• oxidation

The hydrogen peroxide is decomposed in the presence of manganese dioxide into .......

• water and hydrogen

• water and oxygen

• oxygen and hydrogen

.......gas does not burn ,but it helps in burning.

• Nitrogen

• Oxygen

• Carbon dioxide

Iron oxide is formed as a result of combination between.......

• iron and hydrogen

• iron and oxygen

• iron and carbon dioxide