LIVING EARTH
POPULATIONS
INTERACTIONS WITHIN COMMUNITES
100
What is a habitat and give an example of one?
A habitat is the natural environment in which an organism lives, thrives, and interacts with other organisms. The Amazon Rainforest.
100
What is competition and give 3 examples of what causes it?
Competition is when when two or more organisms seek the same resource at the same time.
It occurs when organisms struggle for limited resources like food, space, or mates.
100
What are producers? What are the 2 different ways in which they get their energy?
Producers are things that start a food web, like food plants. They get their energy from their food and also the sun
200
Put these levels of organization of living organisms in order from smallest to largest: community, organism, ecosystem, population, biosphere.
Organism. population, community, ecosystem, biosphere
200
What is a limiting factor and give 2 examples?
Anything that restricts the number of individuals in a population. Some factors are, Climate and Temperature, habitat size, etc.
200
List the 4 types of consumers and describe each one.
Carnivores- these consumers only eat meat, eating the herbivores.
Herbivores- the animals that eat plants, which are the producers.
Omnivores, the animals that eat both the animals and the plants.
Decomposers.- the animals who eat the dead animals, when they pass away.
300
What is ecology?
Ecology is the study of how organisms interact with each other and their environment.
300
Explain 2 different ways that ecologists measure populations.
One way is the Trap, Mark release technique and removing each organism as you count it.
300
What is a food chain? Give an example of a 3-4 step food chain.
Food chain = a simple model of a feeding relationship
Plants -> Grasshopper ->mouse -> snake -> Hawk
400
What are the 3 parts of the biosphere?
1.) top part of Earth’s crust,
2.) all the water covering Earth’s surface,
3.) Earth’s atmosphere
400
List 3-5 ways that a population’s size can change.
-shortage of food
-birth rates
-death rates
400
EXPLAIN the diagram and what an energy pyramid is.
The blueberries go to the herbivores, then they herbivores get eaten by the carnivores, and when the carnivores die, they obviously get eaten by the decomposers.
An energy pyramid is a way to show how energy moves through an ecosystem. It looks like a triangle, with different levels representing groups of organisms, with primary producers at the bottom to the consumers at the top.
500
Identify the major difference between a community and a population, and give one example of each.
A population is one species in an area, like a herd of deer, while a community includes multiple species, like the entire forest ecosystem.
500
What is carrying capacity? How does it relate to biotic potential?
Carrying capacity is the maximum number of individuals in a population that an environment can support.
Biotic potential is how much a population could grow, and carrying capacity is the limit.
500
Define all 3 types of symbiotic relationships
Mutualism- both organisms in the situation benefit, like when a hippo lets birds lay on his back, and lets them eat the bugs off of him. The symbol is ++
Commensalism-When one organism benefits, but the other is unaffected. Ex. Barnacle on a Whale. The symbol is +0
Parasitism- When only one organism benefits, when the other doesn't. Ex: A mosquito or tick. Symbol: +-