Review guide for the scientific method, including definitions, comparisons, and a numbered list of steps to follow in an experiment.

The image you've uploaded is a Scientific Method Review Guide with questions and answers already filled in (in red). The task appears to be for students to review key concepts of the scientific method, including definitions, variables, observations, inferences, hypotheses, theories, bias prevention, and ordering the steps of the scientific method.

Let’s go through each part of the guide and explain the solution clearly and accurately:

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✔ 1. What is science?

Answer: *A process that uses observation to gain knowledge about the world around us.*

Explanation:
Science is not just facts—it's a systematic way of learning about nature. It relies on observation, experimentation, and evidence-based reasoning to understand how things work.

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✔ 2. Define hypothesis, then explain what a hypothesis can and cannot be.

Answer: *Educated guess. (If then because statement) that is not an opinion, not biased, doesn't exclude groups.*

Explanation:
A hypothesis is a testable prediction based on prior knowledge or observations. It should follow the format:
> *"If [I change this], then [this will happen] because [reason]."*

It cannot be:
- An opinion ("I think it's better")
- Biased (favoring one outcome)
- Too broad or vague
- Exclude possible outcomes

Example:
*If plants are given more sunlight, then they will grow faster because photosynthesis increases with light.*

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✔ 3. Compare and contrast variable and constant.

Answer:
*A variable is a factor that changes in an experiment, specifically, the independent variable is purposely changed, which causes the dependent variable to change (your experiment/measurements), while a constant does not change and should be kept the same throughout trials.*

Explanation:
- Variable: Something that can change.
- Independent variable: What you deliberately change (e.g., amount of water).
- Dependent variable: What you measure as a result (e.g., plant growth).
- Constant (controlled variable): Factors kept the same to ensure fair testing (e.g., soil type, temperature).

Example:
In a plant experiment:
- Independent: Water amount
- Dependent: Height of plant
- Constant: Light, pot size, plant type

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✔ 4. Compare and contrast independent and dependent variable.

Answer:
*The independent variable is the ONE THING you purposely change in an experiment, while the dependent variable is what you observe/measure because of what you changed.*

Explanation:
Think of it as cause and effect:
- Independent → Cause (what you manipulate)
- Dependent → Effect (what you measure)

Example:
You're testing how fertilizer affects tomato yield.
- Independent: Amount of fertilizer
- Dependent: Number of tomatoes produced

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✔ 5. Why do experiments usually require a control?

Answer:
*So experimenters have an unchanged group to compare their results to.*

Explanation:
A control group is a standard for comparison. It doesn’t receive the experimental treatment, allowing scientists to see if changes are due to the independent variable or something else.

Example:
In a drug trial, one group gets the drug (experimental), another gets a placebo (control). The control helps determine if the drug actually works.

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✔ 6. What does an observation involve?

Answer:
*Using the 5 senses (touch, taste, sight, smell, sound).*

Explanation:
An observation is gathering information using your senses. In science, it's objective and measurable when possible.

Note: Taste and touch may be avoided in labs for safety.

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✔ 7. What are the two types of observations, and give an example of each?

Answer:
- Qualitative: (the quality of something) a description, color, smell
*Ex – the shirt was yellow*
- Quantitative: a numerical value
*Ex – there are 17 shirts*

Explanation:
- Qualitative = descriptive (color, texture, smell)
- Quantitative = measurable (number, weight, time)

Both are important—qualitative gives context; quantitative allows analysis.

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✔ 8. What is an inference?

Answer:
*An educated suggestion based off of something you observed.*
*Ex – Observation: a student signs out of class. Inference – they are going to the restroom or get water.*

Explanation:
An inference is a logical conclusion drawn from observations. It goes beyond raw data.

Important: Inferences must be reasonable, not guesses without basis.

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✔ 9. What do you think the difference between a hypothesis and a theory is?

Answer:
*A hypothesis is an educated guess that is followed by an experiment.*
*A theory is a WELL TESTED hypothesis by a ton of scientists that is believed to be true, but can be disproved with the advancement of technology.*

Explanation:
- Hypothesis: A starting point—testable idea.
- Theory: A well-supported explanation after repeated testing and evidence.

⚠️ Note: In science, "theory" ≠ "guess." A scientific theory (like evolution or gravity) is highly reliable.

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✔ 10. How do you stop an experiment from being biased (unfairly judged)?

Answer:
*Use quantitative (numerical) data, include a variety of test subjects, have a control group, do not alter results to what you want them to be.*

Explanation:
To reduce bias:
- Use objective measurements (numbers instead of opinions)
- Use random sampling and diverse subjects
- Include a control group
- Avoid data manipulation or cherry-picking results
- Repeat experiments (replication)

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✔ Put the scientific method in number order:

Here are the steps with correct numbering:

| # | Step |
|---|------|
| 1 | Recognize the problem |
| 2 | Research information (previously written/gather information) |
| 3 | Form a hypothesis |
| 4 | Test your hypothesis |
| 5 | Analyze the data |
| 6 | Draw conclusion |
| 7 | Communicate results and retest |

✔ Final Ordered List:
1. Recognize the problem
2. Research information
3. Form a hypothesis
4. Test your hypothesis
5. Analyze the data
6. Draw conclusion
7. Communicate results and retest

Explanation:
This is the standard sequence of the scientific method:
1. Start with a question/problem.
2. Gather background info.
3. Make a testable prediction (hypothesis).
4. Conduct an experiment.
5. Interpret data.
6. Conclude whether the hypothesis was supported.
7. Share findings and repeat/retest for validity.

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🎯 Summary:

This worksheet reviews foundational scientific thinking skills. All answers provided in red are correct and well-explained. The only task left would be to check the order of the scientific method, which has been properly numbered above.

✔ All answers are accurate and complete.
💡 This guide is excellent for reviewing core science concepts before a quiz!

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