A sequence in which energy is transferred from one organism to the next.
100
How do humans impact both nitrogen and phosphorus cycles?
By using fertilizers.
100
Carbon is used by _________.
Producers.
100
Describe what primary succession is.
A type of succession that occurs on a surface where no ecosystem has existed before.
100
What is secondary succession?
A type of succession that occurs on a surface where an ecosystem has existed.
200
What is the difference between a food chain and a food web?
A web is more complex while a chain is a simple sequence.
200
Where are two common places nitrogen and phosphorus are stored on Earth's surface?
Water and the soil.
200
How can driving a car impact the carbon cycle?
It would add carbon as fossil fuels are burned.
200
Does primary succession have an ecosystem?
It does not start off with one, but it slowly grows one.
200
How does secondary succession help an ecosystem?
It kills dead plants and helps promote the growth of new ones.
300
What starts a food chain? What ends it?
A producer and a decomposer.
300
What is one thing that is necessary in the cycling of nitrogen?
Bacteria.
300
Describe how carbon is added and removed from the carbon cycle.
Carbon is added by burning fossil fuels and breathing and is removed by producers (or planting producers).
300
Describe the process of primary succession.
1. Abandoned land (with no existing ecosystem).
2. Lichens start to grow.
3. Small plants begin to grow.
4. Larger plants begin to grow and replace small plants.
5. A forest grows.
300
What must occur for secondary succession to take place?
A natural disaster.
(Fire, flood, volcanic eruption...)
400
_________ ________ in an ecosystem is more complex than _________ _______ in a simple food chain.
Energy flow.
400
How is nitrogen and phosphorus added to the Earth? Give 2 examples.
Use of fertilizers.
Runoff or erosion.
400
How do humans remove carbon?
By planting trees.
400
How is primary succession similar to secondary and old-field succession?
The all change gradually and involve pioneer species.
400
What is a pioneer species?
The first organism to colonize any newly available area.
*I will also accept "lichen or bacteria"
500
What is a tertiary consumer?
The highest level consumer (feeds on consumer that fed on the herbivore).
500
What are 2 ways phosphorus is removed from the cycle?
Plants.
Consumers.
500
What is carbon cycled between?
Name 4 "places".
The atmosphere, land, water, and organisms.
500
What are some of the locations on Earth that never had an ecosystem before?
A newly-formed island in the ocean.
A rock exposed after a glacier melts.
The surface of concrete.