Test: Competition

Using information from Table 1, the wolf spiders compete MORE for springtail food resources in _________ . Choose one answer below.

• the forest
• the schoolyard
• neither; it is the same in both the forest and the schoolyard

Describe the reasoning for your answer in Question 1.

In Figure 3, which group of spiders grew more during this time period? Choose one answer below.

• They both grew the same amount
• Group A (Normal Food)
• Group B (Less Food)

Use the Claim to complete the sections that summarize the key findings of the investigation. The Claim: Question: What are you trying to prove true? Answer: (Claim)The difference in spider growth was caused by the amount of food each group was given. Part 1: Science Principles The science ideas and facts that everyone already agrees are true that are related to the claim. Changes in the availability of resources, like food, may affect:

• the growth of individuals, competition among individuals (the growth of spiders).
• the fun that spiders can have with other spiders.
• the color of each spider can change to the color of the food and other spiders can eat th

Part 2. Connection to Evidence Evidence that relates to your scientific principles. We saw that spiders that receive normal food (Group A):

• have less mass or grow less than spiders that receive a normal amount of food (Group A).
• have more mass or grow more than spiders that receive a smaller amount of food (Group B).
• No matter how much food group A or B of spiders receive, they always grow the same.

Part 2. Connection to Evidence Evidence that relates to your scientific principles. We saw that spiders that receive less food (Group B):

• have less mass or grow less than spiders that receive a normal amount of food (Group A).
• have more mass or grow more than spiders that receive a smaller amount of food (Group B).
• No matter how much food group A or B of spiders receive, they always grow the same.

Part 3: The Conclusion How do the principles and evidence prove your claim? Because ...

• food availability does not affect individuals’ growth (the grow of spiders)
• more food availability decrease the individual's growth (the grow of spiders)
• food availability can affect individual's growth (the growth of spiders),

Part 3: The Conclusion How do the principles and evidence prove your claim? This means...

• that increasing the amount of food available for the spiders caused lesser growth.
• that reducing the amount of food available for the spiders caused lesser growth.
• that reducing the amount of food available for the spiders caused more growth.

Describe why forest wolf spiders are larger than the schoolyard wolf spiders.

• The school spiders are small because they don't have to compete for springtail food like those in the forest.

• The spiders in the school are smaller than those in the forest to hide from predators; they do not compete for anything.

• The forest spiders don't need to compete for springtail food resources so their growth is not limited by food resource availability.