Matter and Cycling

Most of the gases in exhaled air is carbon dioxide.

• T

• F

For a plant under bright light, the rate of carbon dioxide uptake is higher than the rate of oxygen uptake.

• T

• F

Tags

NGSS.MS-LS1-6

Photosynthesis helps maintain the balance between carbon dioxide and oxygen in the atmosphere.

• T

• F

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following combinations about the uptake or release of carbon dioxide and oxygen under dark conditions for plants is correct?

• CO2: net uptake O2: net release

• CO2: net uptake O2: net uptake

• CO2: net release O2: net release

• CO2: net release O2: net uptake

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Compared with dry inhaled air, exhaled air contains (1) water vapour and (2) carbon dioxide.

• 1: more 2: more

• 1: more 2: less

• 1: less 2: more

• 1: less 2: less

Which of the processes below can help lower the carbon dioxide level in the atmosphere?

• Photosynthesis

• Respiration

• Burning of fossil fuels

• All of the above

Tags

NGSS.MS-LS1-6