Ch. 3 Section 4 Day 2

Ch. 3 Section 4 Day 2

Biology Team: Whole Group Instruction

Poll

______________________gas makes up 78% of Earth’s atmosphere.

• Oxygen

• Nitrogen

• Water

• Carbon

Poll

Bacteria that live in the soil and on the roots of legumes are able to convert nitrogen gas into ammonia. This is called what?

• Denitrification

• Nitrogen Gas

• Ammonia

• Nitrogen Fixation

• Nitrates

Multiple Choice

What is it called when the consumers die and decomposers return nitrogen to the soil as ammonia(NH4).

• Denitrification

• Phosphorous Cycle

• Sediment

• Phytoplankton

Multiple Choice

Phosphorous is found mainly on land and in rocks and soil minerals, and in ocean sediments. As the rocks and sediments wear down, phosphate(PO43− ) is __________________.

• Absorbed

• Converted to Nitrogen

• Released

• Phytoplankton

Open Ended

When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly it is said to be what? Write your response below.