Marilu wants to know the effect of the amount of pesticides on the size of apples. One apple tree is treated with pesticide while the other is not.

What is the independent variable?

Marilu wants to know the effect of the amount of pesticides on the size of apples. One apple tree is treated with pesticide while the other is not.

What is the dependent variable?

Ecologist John P. Williams wants to know if the deer population is influenced by the size of the wolf population. Dr. Williams requests that 20 wolves be added to the park. Each month afterward Dr. Williams and other ecologists record the deer population.

What is the dependent variable?

Ecologist John P. Williams wants to know if the deer population is influenced by the size of the wolf population. Dr. Williams requests that 20 wolves be added to the park. Each month afterward Dr. Williams and other ecologists record the deer population.

What is the independent variable?

Dr. Suri wants to know if the temperature of a nest will impact the number of lizards born male vs. female. She puts two nests in two separate tanks. One nest has room temperature air while the other nest is heated. Dr. Suri then records the number of male vs. female lizards in each nest. What is the independent variable?

Dr. Suri wants to know if the temperature of a nest will impact the number of lizards born male vs. female. She puts two nests in two separate tanks. One nest has room temperature air while the other nest is heated. Dr. Suri then records the number of male vs. female lizards in each nest. What is the dependent variable?

Yadi wants to determine if different types of pitches impact his batting average. He has the pitcher throw him a curve ball 10 times then he records the number of times he hit the ball. He then has the pitcher throw him a fast ball 10 times he then records the number of times he hit the ball.

What is the Independent Variable?

Nora wants to know if the sunflowers grow taller if they are exposed to more sunlight. She grows one of her sunflower plants in indirect sunlight and grows the other sunflower plant in direct sunlight. She then measures the height of the sunflowers after 12 weeks. What is the dependent variable?

Yadi wants to determine if different types of pitches impact his batting average. He has the pitcher throw him a curve ball 10 times then he records the number of times he hit the ball. He then has the pitcher throw him a fast ball 10 times he then records the number of times he hit the ball.

What is the Dependent Variable?

Researcher Susan Knasko was interested in how different odors affect people’s behavior. She conducted an experiment in which the independent variable was whether participants were tested in a room with no odour or in one scented with lemon, lavender, or dimethyl sulfide (which has a cabbage-like smell). She was primarily interested in how the odors affected people’s creativity, she was also curious about how they affected people’s moods and perceived health. Although she found that creativity was unaffected by the ambient odor, she found that people’s moods were lower in the dimethyl sulfide condition, and that their perceived health was greater in the lemon condition.

How many dependent variables were found in this experiment?

Researcher Susan Knasko was interested in how different odors affect people’s behavior. She conducted an experiment in which the independent variable was whether participants were tested in a room with no odour or in one scented with lemon, lavender, or dimethyl sulfide (which has a cabbage-like smell). She was primarily interested in how the odors affected people’s creativity, she was also curious about how they affected people’s moods and perceived health. Although she found that creativity was unaffected by the ambient odor, she found that people’s moods were lower in the dimethyl sulfide condition, and that their perceived health was greater in the lemon condition.

Which word in the paragraph indicates the dependent variable(s)?

Researcher Susan Knasko was interested in how different odors affect people’s behavior. She conducted an experiment in which the independent variable was whether participants were tested in a room with no odour or in one scented with lemon, lavender, or dimethyl sulfide (which has a cabbage-like smell). She was primarily interested in how the odors affected people’s creativity, she was also curious about how they affected people’s moods and perceived health. Although she found that creativity was unaffected by the ambient odor, she found that people’s moods were lower in the dimethyl sulfide condition, and that their perceived health was greater in the lemon condition.

What are the dependent variables in this experiment?

Researcher Susan Knasko was interested in how different odors affect people’s behavior. She conducted an experiment in which the independent variable was whether participants were tested in a room with no odor or in one scented with lemon, lavender, or dimethyl sulfide (which has a cabbage-like smell). She was primarily interested in how the odors affected people’s creativity, she was also curious about how they affected people’s moods and perceived health. Although she found that creativity was unaffected by the ambient odor, she found that people’s moods were lower in the dimethyl sulfide condition, and that their perceived health was greater in the lemon condition.

What is the independent variable in this experiment?

Every day we add more greenhouse gasses to our air when we burn fossil fuels like oil, coal, and natural gas. Greenhouse gasses trap the sun’s heat, so as we add more the Earth is heating up! What does climate change mean for the species on our planet? The timing of life cycle events for plants and animals, like flowering and migration, is largely determined by cues organisms take from the environment. The timing of these events is called phenology.

What does phenology mean, according to the text?

When animals are born, some offspring are able to survive on their own, while others rely on parental care. Parental care can take many forms. One or both parents might help raise the young, or in some species other members of the group help them out. The more time and energy the parents invest, the more likely it is that their offspring will survive. However, parental care is costly for the parents. When parents invest time, energy, and resources in their young, they are unable to invest as much in other activities, like finding food for themselves. This results in a tradeoff, or a situation where there are costs and benefits to the decisions that must be made. Parents must balance their time between caring for their offspring and other activities.

According to information in paragraph 1 of the background research text, which of the following is a consequence of increased parental care?

Read the excerpt:

"In addition to what I’ve mentioned, other treatment goals will include providing relief from specific symptoms such as reducing lactic acid build-up, controlling seizures, reducing nausea, and reducing vomiting. It is important that you take as many precautions as reasonably possible to minimize Nicole’s exposure to other people who are sick with colds and other communicable

illnesses as illness will exacerbate Nicole’s illness,” the doctor explained."

Based on your understanding of the paragraph, what is most likely the meaning of the word “communicable”?

Read the excerpt:

"In addition to what I’ve mentioned, other treatment goals will include providing relief from specific symptoms such as reducing lactic acid build-up, controlling seizures, reducing nausea, and reducing vomiting. It is important that you take as many precautions as reasonably possible to minimize Nicole’s exposure to other people who are sick with colds and other communicable

illnesses as illness will exacerbate Nicole’s illness, the doctor explained."

Based on your understanding of the paragraph, what is most likely the meaning of the word “exacerbate”?

On the reef, anemonefish groups also experience shifts in how much food is available. In years with a lot of food, the breeding pair has many young, and in years with little food they do not breed as often. Specifically, Tina thought that food availability would determine how much time and energy parents invest in parental care behaviors. She collected data from 20 breeding pairs of fish, 10 of which she gave half rations of food and 10 of which she gave full rations. The experiment ran for six lunar months. Every time a pair laid a clutch of eggs, Tina waited seven days and then took a 15-minute video of the parents and their nest. She watched the videos and measured three parental care behaviors: mouthing, fanning, and total time spent tending for both males and females. Some pairs laid eggs more than once, so she averaged these behaviors across the six months of the experiment. Tina predicted that parents fed a full ration of food would perform more parental care behaviors, and for a longer amount of time, than parents fed a half ration.

Based on information in the background research text and the data displayed in Table 1, which of the following would be the most appropriate title for the table?

Which of the following statements about the relationship between the variables in this study is best supported by evidence in the graphs?