Ecosystems & Food Webs
This organism makes its own food and provides energy for the ecosystem.
What is a producer?
Only about this percent of energy transfers from one trophic level to the next.
What is 10%?
These organisms recycle nutrients back into the soil.
What are decomposers?
The substance being dissolved in a solution.
What is a solute?
Burning wood is this type of change.
What is a chemical change?
In a food web, removing producers would MOST likely cause this to happen.
What is the collapse of the food web because energy cannot flow to consumers?
(fail, disrupt, death)
If producers contain 1,000 kcal of energy, primary consumers would receive about this much energy.
What is 100 kcal?
During photosynthesis, producers take in ("breathe") this gas.
What is carbon dioxide?
Adding more water to saltwater causes the concentration to do this.
What is decrease?
Shredding paper is this type of change.
What is a physical change?
A rabbit eats grass, and a snake eats the rabbit. The snake is classified as this type of consumer.
What is a secondary consumer?
Energy decreases in an ecosystem because much of it is lost as this.
What is heat?
Consumers help cycle oxygen by doing this.
hat is inhaling oxygen and releasing carbon dioxide?
This action increases the rate of dissolving in a solution.
What is stirring?
-or increasing temperature
-or increasing the surface area
The evidence we look for that shows a chemical change has occurred
What is color change, gas production, light, temperature change, precipitate, odor
If field mice are removed from a food web, this predator population would MOST likely decrease.
What are tertiary consumers?
A trophic level with only 10 kCal of energy would MOST likely contain this organism.
What is a tertiary consumer?
Nitrogen, phosphorus, and sulfur are important because they help organisms do this.
What are important life processes?
Powder dissolves faster than large chunks because it has greater this.
What is surface area?
This word means a solid forming after mixing together two liquids
Precipitate
Explain why a grassy meadow can support more organisms than a coyote in an ecosystem.
Because producers contain the greatest amount of available energy and energy decreases at each trophic level.
If tertiary consumers receive 5 kcal of energy, estimate how much energy the producers originally contained.
What is approximately 5,000 kcal?
Describe how nutrients move through an ecosystem.
Producers use nutrients, consumers eat producers, and decomposers return nutrients to the soil for reuse.
In saltwater, identify the solvent and solute.
What is water as the solvent and salt as the solute?
Recycling aluminum cans is considered this type of change
What is a physical change?