Solve for x
Food Chains and Webs
Graphs and Scatter Plots
Resources
Animal Interaction Classifications
100
x + 2 = 6
x=4
100
What organisms in the food web are responsible for creating food for the ecosystem from sunlight?
Producers
100
Is the relationship between dog height and dog weight positive, negative, or none?
Positive
100
What is one example of an essential resource in an ecosystem?
Water, food, oxygen, sunlight
Others: carbon dioxide, nutrient-rich soil
100
Foxes are known to eat raccoons. What type of relationship do foxes and raccoons have?
Predation (predator and prey)
200
6x = 24
x = 4
200
What organisms in the food web are responsible for recycling dead and decaying matter back into nutrients for producers?
Decomposers
200
Complete the statement using the scatterplot below: As the weight of a vehicle goes down, fuel efficiency goes _______________.
Up
200
What effect does increasing access to food typically have on a population in an ecosystem.
It increases the population
200
What is an example of two organisms with a parasitic relationship?
Answers vary. Many animals have parasitic relationships with mosquitos, ticks, fleas, bed bugs, leaches, etc.
300
x - 16 = -6
x = 10
300
What happens to the energy in ecosystems as we go up the food web from producers to top-level consumers?
It decreases at each level as useful chemical energy is converted by living organisms into heat!
300
In which graph are the variables more correlated, the red graph on the left or the green graph on the right?
The red graph (points closer to together and forming more of a line).
300
What is one reason we do controlled burns of certain forests?
Answers vary:
Clear way and create conditions for new growth
Prevent larger fires from taking place in the future
300
Coyotes won't eat foxes, but they will sometimes kill them to prevent them from causing resource scarcity. What kind of relationship do coyotes and foxes have?
Interspecies Competition
400
2x - 5 = 25
x = 15
400
What do primary consumers eat, and who eats them?
They eat plants and other producers (they are herbivores) and are eaten by higher-level consumers, such as secondary consumers (who may be omnivores or carnivores).
400
Using the scatterplot below, describe the relationship between number of seashells and number of friends. 
There is no correlation between the two variables
400
Provide an example of something that could lower a moose population in an area.
Increased number of predators, decrease in amount of available food or drinkable water, disease.
400
What is an example of two organisms that have a mutualistic relationship?
Answers vary. Common answers include bees and flowers, clown fish and sea anemones, fungus and algae, and gut bacteria with many different organisms.
500
2(x+2) = 0
x = -2
500
Using the food web below, create one complete food chain that starts with corn and ends with eagle (no pictures necessary, just names connected with arrow)
Answers vary:
Corn -> Grasshopper -> Frog -> Python -> Eagle
Corn -> Grasshopper -> Frog -> Eagle
Corn -> Grasshopper -> Rat -> Eagle
Corn -> Grasshopper -> Rat -> Python -> Eagle
Corn -> Grasshopper -> Rat -> Wolf -> Eagle
Corn -> Grasshopper -> Rat -> Wolf -> Python -> Eagle
500
The below data was taken from a sample of water that was heated up and left out for several minutes. The temperature of the water was taken each minute. Draw a graph of this data, and describe the relationship.
The temperature is strongly negatively correlated with the amount of time left out.
500
List one way climate change may impact an ecosystem.
Answers vary:
In forests and grasslands, more droughts, more fires, both of which could lead to less food and drinkable water.
Rising sea levels may affect livable space for land organisms at coasts, as well as sea acidity for sea organisms.
More unexpected weather patterns may harm species and throw off ecosystem balance.
500
What is the difference between mutualism and commensalism?
In mutualism, both organisms benefit, but in commensalism, only one benefits and the other is neutral or unaffected.