Matter and Energy in Ecosystems
Flow of Energy
Cycling of Matter
Biodiversity
Random
100
This organisim is responsible for returning nitrogen back into the system.
Nitrogen-fixing bacteria
100
Heterotrophs do this?
Consume food by eating other organisms.
100
This is anything that absorbs more carbon from the atmosphere than it releases – for example, plants, the ocean and soil.
Carbon Sink or Sink
100
In our lab, these poor fishy could no longer keep populating because...
They ran out of space.
100
A group of organisms that have similar traits and are able to produce fertile offspring.
Species
200
What is Photosynthesis?
Photosynthesis is a series of chemical reactions that convert light energy, water, and carbon dioxide into the food-energy molecule glucose, and give off oxygen.
200
Autotrophs do this?
Produce their own food.
200
This chemical formula H2O is represented in this type of cycle diagram?
Water Cycle or Hydraulic Cycle
200
This is when a population's size grows so large that is causes damage to the environment.
Overpopulation
200
All the populations of different species that live together in the same area at the same time.
Community
300
This E-word flows in one direction unlike forms of matter?
Energy
300
If the first trophic level in an energy pyramid receives 1,000 units of energy from the Sun, how much energy is available for the second trophic level?
100 units of energy.
300
Water can also be stored deep underground in these?
Aquifers
300
The largest number of individuals of one species that an ecosystem can support.
Carrying Capacity
300
All the organisms of the same species that live in the same area at the same time.
Population
400
This is a simple model that depicts how energy flows from the sun to plants and then to a consumer?
Food Chain
400
What eats the walrus?
Humans or Killer Whale
400
This is the most abundant gas in Earth's atmosphere?
Nitrogen
400
Water, Food, Sunlight, and Temperature can restrict the size of populations, because they are ____ ____.
Limiting Factors
400
This is a great food web, but it is missing one big thing.
The Sun
500
Food chains and food webs show how energy moves in an ecosystem. However, they do not show how the amount of energy in an ecosystem changes. Scientist use a model called what?
Energy Pyramid
500
Which organism has the most energy available in the food web shown?
Phytoplankton
500
Identify at least two sinks in this diagram.
Fossil Fuels, Soil, Forest, or Ocean
500
The potential growth of a population is called this.
Biotic Potential
500
A detritivore is an animal that would most likely get its energy from where?
By feeding on dead organic material.