What is the difference between a population and a community?

A population is one species in an area; a community is all the species living and interacting there

What is the role of producers in an ecosystem?

They make food by photosynthesis, bringing energy into the ecosystem

Energy is lost as heat and used in life processes at each level, so less is available higher up

Matter is conserved and recycled by decomposers, but energy is lost as heat and must be replaced by sunlight

The maximum population size the environment can support over the long term

The population has reached the carrying capacity

The gradual, predictable change in a community's species over time, often toward a stable climax community

It releases carbon dioxide, a greenhouse gas that traps heat and warms the climate

14questions. Pick an answer and you'll see why right away.

What is the difference between a population and a community?
Which is an abiotic factor in a pond ecosystem?
What is the role of producers in an ecosystem?
About what percentage of energy is passed from one trophic level to the next?
An energy pyramid shows producers with $9\,000$ kJ. About how much energy reaches the primary consumers?
Why does an energy pyramid get smaller toward the top?
Why does matter cycle in an ecosystem while energy does not?
What is the carrying capacity of an environment?
On a population-growth graph, what does it mean when the curve levels off?
Which limiting factor could slow the growth of an animal population?
Bees feed on nectar and pollinate flowers, benefiting both. What type of relationship is this?
A tick feeds on a deer's blood and harms it. What type of relationship is this?
What is ecological succession?
How does burning fossil fuels contribute to climate change?