living part that affects an ecosystem
Biotic Factor
Ants created an anthill in the picture below. What type of interaction is this?
Organism to Environment
Name 2 direct relationships in the food web.
Examples:
Blue Heron - Chubb
Trout - Perch
Foxes - Raccoons
Mice - Grass
From 2017 to 2022, what happened to the Dolphin population?
Decreased
What determines if you are a predator or prey?
A. Food
B. The organisms and prey
C. Environmental factors and the ecosystem
D. If I like food, I'm a predator
C. Environmental factors and the ecosystem
an organism that is eaten
prey
A storm traveled through this area. What type of interaction is this?
Environment to Environment
A disease has caused the owl population to decrease. How does this affect the Shrew population? Explain.
The shrew population would increase because there would be less owls to eat them
Which answer best describes the trends on this graph?
A. The human population is declining
B. The parrot population is increasing
C. The parrot population stayed the same for 300 years
D. None of the Above
C. The parrot population stayed the same for 300 years
Describe abiotic factors
all of the nonliving things that affect an ecosystem and its populations
Examples: temperatures, light, water, tides, salinity in the ocean
an action that an organism is able to do because of the structure
Function
Marcus left his candy bar on the counter so he would have a treat after school. When he arrived home, he saw that the candy bar was half eaten. What type of interaction can be observed from the candy bar?
Organism to Environment
an organism interacted with Marcus' candy bar
5. Which explanation would best describe why the grasshopper population would decrease or increase.
A. Due to a decrease in the spider population, grasshoppers lost a major food source.
B. Due to an increase in spiders, grasshopper population increased.
C. Due to a decrease in the spider population, grasshopper predation decreased and their population increased.
C. Due to a decrease in the spider population, grasshopper predation decreased and their population increased.
True or False: Prior to point A, the trout population is increasing.
False: it is stable
Which of the items on the food label below are considered food? (must list all and only them to earn points)
Total Fat; Carbohydrates; Protein
pollution built up in an organism at the beginning of the food chain/web
Bioaccumulation
What are the 4 relationships that can cause a population to change?
Food; Environment; Reproduction; Other Organisms
Name 2 predators and what they eat.
Examples:
Walleye eat Lake Trout
Leeches eat Aquatic Snails
Clams eat Plants
In 2000, the human population had continued to increase and the parrot population continued to decrease. Using the graph, create a question that would be best to begin an investigation about “why” those populations changed?
EXAMPLE:
Did the human population do something to the environment that helped them, but affected the parrot population?
Did humans start hunting parrots?
Why do you need food? Explain
You need food for energy and to build strong bones and muscles for your body.
a collection of all living things in a specific region and place where all organisms are interconnected
Ecosystem
Define structure and function in terms of a predator-prey relationship.
Organisms have developed body parts and traits to maximize their ability to survive in their ecosystem
The spider population has decreased due to a disease. How is the green plant population affected?
The green plant population will decrease because the grasshopper population will increase due to the decrease in spiders
After Point C, what possible interactions caused the sea lamprey population to change? (list at least 2)
Food; Environment; Other Organisms
What are animals that feed on rotten or dead animals called?
Scavengers