Lesson 1
What is the source of all of the energy on Earth?
The Sun
How does energy flow through an ecosystem?
In one direction.
How does matter flow in an ecosystem?
In a cycle
A whale eats krill. This means it is a (herbivore/omnivore/carnivore).
Carnivore
Photosynthesis is the process in which plants use energy from light to produce __________.
Food
Food web
The phenomenon that constantly keeps the planet warm, cozy, and habitable by reflecting solar energy back to the surface.
What were the two cycles of matter we discussed this Module in Life Science?
Carbon cycle and water cycle
Cellular respiration is the process in which organisms break down food to release ________.
Energy
Why is a food web a better representation of how energy moves than a food chain?
Food webs show that animals in an ecosystem can get energy by eating different things.
What process releases too much carbon into the air and into the soil: decomposition, combustion, photosynthesis, or cellular respiration?
Combustion
Name three decomposers we talked about.
worms, bacteria, insects, fungi
Carbon dioxide, light energy, water
As you move upward, from level to level, in an energy pyramid, available energy _____________.
Decreases
This is when water vaporizes and moves into the atmosphere.
Evaporation
Average global temperatures have increased in recent decades, and many scientists cite deforestation as a contributor to this temperature increase. Which could be used as evidence to support this explanation?
Plants are great at absorbing Carbon dioxide from the atmosphere during photosynthesis and replacing it with oxygen. More trees = more oxygen and less additional Carbon dioxide.
Cellular respiration takes in ________ and ________ and releases ________ and _________.
Oxygen, food; Carbon dioxide, energy
How much of the available energy is transferred from one level to the next in an energy pyramid?
10%
How do detritivores help the Carbon cycle?
They process organic matter and decompose it, returning nutrients to the soil and removing old growth from the floor of the ecosystem, allowing more plant growth.
Biosphere