Background: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in an ecosystem. For example, if all of the wolves are removed from a population, then the population of deer or rabbits may increase. If there are too many deer, then they may decrease the amount of plants or grasses in the ecosystem. Decreased levels of producers may then have a detrimental effect on the whole ecosystem. In this example, the wolves would be a keystone species.

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned more about animals that keep grass from growing out of control?
Answer: Molly

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned less about animals that keep grass from growing out of control?
Answer: Karen

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned less about animals that can be keystone species?
Answer: Molly

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned more about animals that can be keystone species?
Answer: Karen

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned more about animals that can have a large effect on the balance of organisms in an ecosystem?
Answer: Karen

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned less about animals that can have a large effect on the balance of organisms in an ecosystem?
Answer: Molly

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned less about wolves?
Answer: Molly

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned more about wolves?
Answer: Karen

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned more about deer and rabbits?
Answer: Molly

Situation: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature.

Question: Which girl learned less about deer and rabbits?
Answer: Karen

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student studied species that play an important role in an ecosystem?
Answer: Bill

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student didn't study species that play an important role in an ecosystem?
Answer: John

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student didn't find out that a single species could become dominant over others?
Answer: John

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student found out that a single species could become dominant over others?
Answer: Bill

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student found out that grazers on a grassland keep grass from growing out of control?
Answer: John

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student didn't find out that grazers on a grassland keep grass from growing out of control?
Answer: Bill

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student didn't find out that predators can be keystone species?
Answer: John

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student found out that predators can be keystone species?
Answer: Bill

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student studied more about wolves?
Answer: Bill

Situation: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers.

Question: Which student studied less about wolves?
Answer: John

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned about keystone species?
Answer: team A

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team didn't learn about keystone species?
Answer: team B

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team didn't learn that predators play an important role in an ecosystem?
Answer: team B

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned that predators play an important role in an ecosystem?
Answer: team A

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned that if all of the wolves are removed from a population, then the population of deer or rabbits may increase?
Answer: team A

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team didn't learn that if all of the wolves are removed from a population, then the population of deer or rabbits may increase?
Answer: team B

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned more about deer?
Answer: team B

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned less about deer?
Answer: team A

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned less about wolves?
Answer: team B

Situation: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience.

Question: Which team learned more about wolves?
Answer: team A

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student studied more about wolves?
Answer: Ned

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student studied less about wolves?
Answer: Kim

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student studied less about keystone species?
Answer: Kim

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student studied more about keystone species?
Answer: Ned

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student studied more about keeping grass from growing out of control?
Answer: Kim

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student studied less about keeping grass from growing out of control?
Answer: Ned

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student learned less about deer?
Answer: Ned

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student learned more about deer?
Answer: Kim

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student learned more about rabbits?
Answer: Kim

Situation: Two students studied animal behavior for the biology class. Ned studied more about predators, while Kim studied more about herbivores.

Question: Which student learned less about rabbits?
Answer: Ned

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned more about potential keystone species?
Answer: Dan

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned less about potential keystone species?
Answer: Joe

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned less about rabbits?
Answer: Dan

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned more about rabbits?
Answer: Joe

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned more about deer?
Answer: Joe

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned less about deer?
Answer: Dan

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned less about wolves?
Answer: Joe

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned more about wolves?
Answer: Dan

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned more about the balance of organisms in an ecosystem?
Answer: Dan

Situation: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers.

Question: Which student learned less about the balance of organisms in an ecosystem?
Answer: Joe