Question
A student made an observation about a plant. Which statement is an observation that the student most likely made?
Plants benefit from tilting their leaves toward the Sun.
At 10 a.m. the plant’s leaves were tilted toward the Sun.
Plants that do not tilt their leaves toward the Sun will not survive.
The tilting of plant leaves toward the Sun evolved over a long period of time.
Question at position 2
2
Multiple Choice
1 point
Question at position 2
An Erie Ecosystem
Presque Isle is located along the short stretch of Pennsylvania coastline on Lake Erie.
Screenshot (171) (1).png
Many different species of plants and animals live in the waters near Presque Isle. An environmental scientist decided to investigate the impact of human activity on the environment surrounding Presque Isle. The scientist used a net to catch several different fish species in the waters off the west shore of the isle. The scientist also took water samples and scrapings from the bottom of Lake Erie to analyze. The scientist was able to identify several different organisms. The food web shows the relationship of some of the organisms within the Presque Isle coastal ecosystem.
Screenshot (172) (1).png
The scientist observed that very few amphipods were present in the water samples that were collected. The scientist thought that the reduced number of amphipods might indicate an endangered ecosystem. In a preliminary report, the scientist hypothesized that the absence of amphipods was due to pesticides being released into Lake Erie that were especially toxic to aquatic invertebrates.
Use the table below to answer the question.
Screenshot (89) (1).png
Which sequence of steps is needed for the scientist’s hypothesis about the absence of amphipods to eventually become a theory?
An Erie Ecosystem
Presque Isle is located along the short stretch of Pennsylvania coastline on Lake Erie.
Screenshot (171) (1).png
Many different species of plants and animals live in the waters near Presque Isle. An environmental scientist decided to investigate the impact of human activity on the environment surrounding Presque Isle. The scientist used a net to catch several different fish species in the waters off the west shore of the isle. The scientist also took water samples and scrapings from the bottom of Lake Erie to analyze. The scientist was able to identify several different organisms. The food web shows the relationship of some of the organisms within the Presque Isle coastal ecosystem.
Screenshot (172) (1).png
The scientist observed that very few amphipods were present in the water samples that were collected. The scientist thought that the reduced number of amphipods might indicate an endangered ecosystem. In a preliminary report, the scientist hypothesized that the absence of amphipods was due to pesticides being released into Lake Erie that were especially toxic to aquatic invertebrates.
Use the table below to answer the question.
Screenshot (89) (1).png
Which sequence of steps is needed for the scientist’s hypothesis about the absence of amphipods to eventually become a theory?
3, 2, 4, 1, 5
4, 3, 5, 1, 2
5, 1, 4, 2, 3
5, 4, 3, 2, 1
Question at position 3
3
Multiple Choice
1 point
Question at position 3
Which statement is a hypothesis?
Which statement is a hypothesis?
The presence of an enzyme increased the reaction rate.
The reaction rate increased 100% once the enzyme was introduced.
Introducing an enzyme into a reaction did not increase the rate of the reaction.
When an enzyme is introduced into a reaction the reaction rate will increase by 100%.
Plants benefit from tilting their leaves toward the Sun.
At 10 a.m. the plant’s leaves were tilted toward the Sun.
Plants that do not tilt their leaves toward the Sun will not survive.
The tilting of plant leaves toward the Sun evolved over a long period of time.
Question at position 2
2
Multiple Choice
1 point
Question at position 2
An Erie Ecosystem
Presque Isle is located along the short stretch of Pennsylvania coastline on Lake Erie.
Screenshot (171) (1).png
Many different species of plants and animals live in the waters near Presque Isle. An environmental scientist decided to investigate the impact of human activity on the environment surrounding Presque Isle. The scientist used a net to catch several different fish species in the waters off the west shore of the isle. The scientist also took water samples and scrapings from the bottom of Lake Erie to analyze. The scientist was able to identify several different organisms. The food web shows the relationship of some of the organisms within the Presque Isle coastal ecosystem.
Screenshot (172) (1).png
The scientist observed that very few amphipods were present in the water samples that were collected. The scientist thought that the reduced number of amphipods might indicate an endangered ecosystem. In a preliminary report, the scientist hypothesized that the absence of amphipods was due to pesticides being released into Lake Erie that were especially toxic to aquatic invertebrates.
Use the table below to answer the question.
Screenshot (89) (1).png
Which sequence of steps is needed for the scientist’s hypothesis about the absence of amphipods to eventually become a theory?
An Erie Ecosystem
Presque Isle is located along the short stretch of Pennsylvania coastline on Lake Erie.
Screenshot (171) (1).png
Many different species of plants and animals live in the waters near Presque Isle. An environmental scientist decided to investigate the impact of human activity on the environment surrounding Presque Isle. The scientist used a net to catch several different fish species in the waters off the west shore of the isle. The scientist also took water samples and scrapings from the bottom of Lake Erie to analyze. The scientist was able to identify several different organisms. The food web shows the relationship of some of the organisms within the Presque Isle coastal ecosystem.
Screenshot (172) (1).png
The scientist observed that very few amphipods were present in the water samples that were collected. The scientist thought that the reduced number of amphipods might indicate an endangered ecosystem. In a preliminary report, the scientist hypothesized that the absence of amphipods was due to pesticides being released into Lake Erie that were especially toxic to aquatic invertebrates.
Use the table below to answer the question.
Screenshot (89) (1).png
Which sequence of steps is needed for the scientist’s hypothesis about the absence of amphipods to eventually become a theory?
3, 2, 4, 1, 5
4, 3, 5, 1, 2
5, 1, 4, 2, 3
5, 4, 3, 2, 1
Question at position 3
3
Multiple Choice
1 point
Question at position 3
Which statement is a hypothesis?
Which statement is a hypothesis?
The presence of an enzyme increased the reaction rate.
The reaction rate increased 100% once the enzyme was introduced.
Introducing an enzyme into a reaction did not increase the rate of the reaction.
When an enzyme is introduced into a reaction the reaction rate will increase by 100%.
Answers
GPT-4o mini
**Question 1: Observation about a plant**
The correct answer is:
**At 10 a.m. the plant’s leaves were tilted toward the Sun.**
This statement is a direct observation that the student likely made, describing what they saw without interpretation or inference.
---
**Question 2: Sequence of steps for the scientist's hypothesis**
The most logical sequence of steps needed for the scientist’s hypothesis about the absence of amphipods to eventually become a theory is:
**5, 4, 3, 2, 1**
Here's why:
1. **5**: Make observations - The scientist observed the reduced number of amphipods.
2. **4**: Formulate a hypothesis - The scientist hypothesized that the absence of amphipods was due to pesticides.
3. **3**: Conduct experiments to test the hypothesis - The scientist would need to collect data to support or refute the hypothesis regarding pesticides.
4. **2**: Analyze data - Analyzing the results of the tests to see if they support the hypothesis.
5. **1**: If the hypothesis is tested multiple times and consistently supported, it could eventually be accepted as a theory.
---
**Question 3: Which statement is a hypothesis?**
The correct answer is:
**When an enzyme is introduced into a reaction the reaction rate will increase by 100%.**
This statement proposes a specific expectation that can be tested, making it a hypothesis. The other options either present observations or definitive statements rather than testable predictions.
The correct answer is:
**At 10 a.m. the plant’s leaves were tilted toward the Sun.**
This statement is a direct observation that the student likely made, describing what they saw without interpretation or inference.
---
**Question 2: Sequence of steps for the scientist's hypothesis**
The most logical sequence of steps needed for the scientist’s hypothesis about the absence of amphipods to eventually become a theory is:
**5, 4, 3, 2, 1**
Here's why:
1. **5**: Make observations - The scientist observed the reduced number of amphipods.
2. **4**: Formulate a hypothesis - The scientist hypothesized that the absence of amphipods was due to pesticides.
3. **3**: Conduct experiments to test the hypothesis - The scientist would need to collect data to support or refute the hypothesis regarding pesticides.
4. **2**: Analyze data - Analyzing the results of the tests to see if they support the hypothesis.
5. **1**: If the hypothesis is tested multiple times and consistently supported, it could eventually be accepted as a theory.
---
**Question 3: Which statement is a hypothesis?**
The correct answer is:
**When an enzyme is introduced into a reaction the reaction rate will increase by 100%.**
This statement proposes a specific expectation that can be tested, making it a hypothesis. The other options either present observations or definitive statements rather than testable predictions.