Hierarchy
Factors
Food Webs & Energy
Symbiotic Situations
Battle for Resources
100
A single living thing, such as one desert mouse.
Organism
100
Is "Sunlight" a biotic or abiotic factor?
Abiotic
100
These organisms are always at the bottom of a food web because they make their own energy.
Producers (Plants)
100
In this type of relationship, both organisms benefit.
Mutualism
100
Competition occurs when organisms try to use the same ___________ resource.
limited
200
A group of the same species living in the same area is called a...
population
200
Name one biotic factor you might find in a forest.
Trees, birds, squirrels, bacteria, etc.
200
In a food web diagram, what does the arrow represent?
The flow of energy
200
A tick drinking blood from a dog is an example of ______________.
Parasitism
200
Animals often compete for food and water. What is one thing plants often compete for?
sunlight or space
300
Which level of organization includes both living populations and non-living factors like water and sunlight?
Community
Population
Ecosystem
Organism
Ecosystem
300
Why is a fallen, decaying log still considered a biotic factor?
Because it is made of water.
Because it came from a living thing.
Because it is in the sunlight.
Because it is non-living.
Because it came from a living thing.
300
If the population of snakes in a food web decreases, what will most likely happen to the population of mice that the snakes eat?
The mouse population will decrease.
The mouse population will increase.
The mouse population will not change.
The mouse population will increase.
300
An orchid grows on a high tree branch. The orchid gets more sunlight, but the tree is not helped or harmed. This is:
Mutualism
Parasitism
Commensalism
Commensalism
300
If two different species of fish prefer the same temperature of water, what will happen?
A. They will share the space peacefully.
B. They will compete for the best spots in that temperature.
C. One species will turn into a producer.
They will compete for the best spots in that temperature
400
If you are studying all the different types of fish, frogs, and plants in a pond, you are studying a ___________.
Community
400
List two abiotic factors that a plant needs to survive.
Sunlight, water, CO2, or soil.
400
These organisms, such as fungi and bacteria, break down dead matter and return nutrients to the soil.
Decomposers
400
Why do flowers have bright colors and sweet nectar?
To attract pollinators (Mutualism).
400
Why does a strangler fig grow on top of other trees in the rainforest?
To compete for sunlight (the forest floor is too dark).
500
Which of the following lists the levels from most complex to simplest?
Organism, Population, Community, Ecosystem
Ecosystem, Community, Population, Organism
Population, Organism, Ecosystem, Community
Ecosystem, Community, Population, Organism
500
A 6th grader is observing a pond. Which of the following is an ABIOTIC factor they might find?
- A green bullfrog sitting on a lily pad.
- The dissolved oxygen and water temperature.
- The algae growing on the bottom of a rock.
- A dragonfly hunting near the surface.
The dissolved oxygen and water temperature.
500
What is the "original" source of energy for almost all food webs on Earth?
The Soil
Producers
The Sun
Decomposers
The Sun
500
Which of the following is a Parasite/Host relationship?
A shark eating a seal.
A bee pollinating a clover.
A tapeworm living inside a cow.
A hawk hunting a mouse.
A tapeworm living inside a cow.
500
If the population of rabbits (prey) decreases, what will happen to the two predators (foxes and hawks) that both hunt rabbits?
They will hunt each other.
Competition between the foxes and hawks will increase.
The foxes and hawks will start a mutualistic relationship.
Competition between the foxes and hawks will increase.