Ocean Nutrient Recycling

Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert

• nitrates intro nitrogen gas
• ammonia into proteins
• nitrogen gas into ammonia
• proteins into nitrates

Tags

NGSS.MS-LS2-3

What is one of the most important processes that removes carbon from the atmosphere? 

• photosynthesis
• cellular respiration
• erosin
• soil respiration

Tags

NGSS.MS-LS1-6

Nitrogen fixation processes nitrogen from which of the following sources?

• lightning
• fertilizers
• dead plants
• atmosphere

Tags

NGSS.MS-LS2-3

Dead zones are low-oxygen areas that develop on the seafloor. Scientists hypothesize that phytoplankton blooms cause these dead zones. Phytoplankton blooms occur when excess nutrients are introduced by pollution from fertilizers, sewage plants, and the burning of fossil fuels. Which of the following would most likely cause an increase in these contributors to dead zones?

• Replacing coal-fired power plants with windmills
• Rainfall patterns that increase freshwater runoff from terrestrial ecosystems
• Farming practices that reduce nitrate and phosphate applications
• Constructing efficient water recovery and treatment plants

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Plants and animals cannot use nitrogen directly from the air.

• True
• False

Tags

NGSS.MS-LS2-1

Organisms that play a role in the nitrogen cycle

• only plants

• only animals

• only bacteria

• plants, animals, & bacteria

• plants & animals

How do consumers get nitrogen?

• the atmosphere

• eating other organisms

• bacteria

• lightning

When nitrogen gas is turned in to a form that plants and animals can use is called 

• Combustion
• Photosynthesis
• Decomposition
• Nitrogen Fixation

The more nitrogen (and phosphorus) oceanic phytoplankton receive the more ____ they will be. 

• boring
• productive
• active
• spry

Consumers release nitrogen daily as (or ) from:

• Fecal waste products
• Respiration waste products
• Breathing
• Moving and living