Biology 7.2.3

Question 1

Elements, Such as Carbon, are not ___ Resources.

Answer 1

Endless.

Question 2

There is a ___ Amount of Each Element on the Planet.

Answer 2

Finite.

Question 3

Elements Must be ___ in Order to Allow New Organisms to be Made & Grow.

Answer 3

Recycled.

Question 4

What are all of the Parts in the ‘Carbon Cycle’? (8)

Answer 4

-Carbon Dioxide in the Atmosphere.

-Used in Photosynthesis, to Produce Carbohydrates & Other Biological Molecules. (eg Glucose)

-Plants are Eaten by Animals.

-Carbon is Released Into the Atmosphere During Respiration of Plants, Animals, & Decomposers.

-Carbon in Dead & Decaying Matter is Broken Down by Decomposers.

-Carbon Dioxide in Decaying Matter & Waste.

-Carbon Stored in Fossil Fuels (Coal & Oil).

-Carbon Released Back Into the Atmosphere when Fossil Fuels are Burned (Combustion).

Question 5

What are the Steps of the ‘Water Cycle’? (6)

Answer 5

-Water Evaporates from the Oceans & Seas, Via Thermal Energy Provided by the Sun.

-As the Water Rises, it Condenses, Forming Clouds.

-As More & More Water Keeps Evaporating from the Oceans & the Seas, & then Condensing as it Rises, the Clouds become very Heavy. Then, Water is Released as Precipitation (Rain, Snow, Hail, Sleet).

-Precipitation Forms Rivers, which Feeds Water Back into the Oceans & Seas.

-Animals Take in Water for Respiration. Water is Released from Animals Via Faeces, Urine, & Exhalation.

-Plants Take in Water from the Roots for Respiration & Photosynthesis. Then, Water is Released from Plants Via Transpiration into the Atmosphere. (Plants Intake Water Via Osmosis in their Roots, then Use it for Respiration & Photosynthesis, then It Evaporates Out of the Stomata- Transpiration Stream.).

Question 6

What is the Vital Role Played by Microorganisms in Cycling Material Through an Ecosystem?

Answer 6

They Return Carbon to the Atmosphere as Carbon Dioxide, & Mineral Ions to the Soil.