Grade 4 Scientific Method Worksheets 2024 - Free Printable

Here's the correct matching of each scientific method vocabulary term to its definition, along with a clear explanation for each:

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1. A possible answer to a question that can be tested to see if it is correct → _hypothesis_

✔ Explanation: A hypothesis is an educated guess or proposed explanation based on limited evidence. It must be testable and falsifiable — meaning you can design an experiment to prove it right or wrong.

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2. The problem you want to solve in an experiment → _question_

✔ Explanation: Every scientific investigation starts with a clear, focused question — such as “Does sunlight affect plant growth?” This question guides the entire experiment.

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3. The reason for the experiment → _purpose_

✔ Explanation: The purpose explains *why* you are conducting the experiment — what you hope to learn or discover. It’s often stated as “The purpose of this experiment is to determine...”

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4. The facts you find in reference source that support your data in an experiment → _research_

✔ Explanation: Before experimenting, scientists gather background information from books, articles, or databases. This research helps them understand what’s already known and supports their findings.

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5. The items needed to complete the experiment → _material_

✔ Explanation: Materials are the physical tools, substances, or equipment required — like beakers, rulers, seeds, or thermometers — to carry out the procedure.

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6. The results of the experiment in a chart, graph, or other visual form → _data_

✔ Explanation: Data refers to the measurements, observations, or numbers collected during the experiment. Visual representations (graphs, charts) help organize and interpret this data.

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7. The explanation of whether the experiment worked or not → _result/conclusion_

✔ Explanation: The conclusion interprets the data and answers the original question. It states whether the hypothesis was supported or rejected, and why. Sometimes called “results” when referring to outcomes.

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8. A test done to see if a hypothesis is correct or not → _experiment_

✔ Explanation: An experiment is a controlled procedure designed to test a hypothesis. It involves variables, controls, and repeated trials to ensure reliability.

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9. A forecast of future event → _prediction_

✔ Explanation: A prediction is a statement about what you expect to happen *before* conducting the experiment, based on your hypothesis. Example: “If I water plants daily, then they will grow taller.”

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10. Anything learned from an experiment using the 5 senses → _data_

✔ Explanation: Data includes all observations — qualitative (what you see, smell, hear, feel, taste) and quantitative (numbers). Since the 5 senses are used to observe, this also falls under “data.” *(Note: Some worksheets may distinguish “observations” vs “data,” but here, “data” is the only matching term available.)*

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11. Using prior knowledge that could explain the outcome of an experiment → _prediction_

✔ Explanation: While “prediction” is listed again, this definition fits best because predictions are based on prior knowledge or experience. You use what you already know to anticipate what might happen. *(Note: In some contexts, this might also relate to “hypothesis,” but since “hypothesis” was already matched to #1, and “prediction” fits logically here as an inference from prior knowledge, we assign it here.)*

> ⚠️ Important Note: There are 11 definitions but only 10 words in the word bank. One term must be reused. “Data” appears twice (for #6 and #10), which is acceptable since both involve observations/measurements. “Prediction” is also used for #9 and #11 — which makes sense because both involve forecasting or inferring based on knowledge.

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✔ Final Answer Key:

1. hypothesis
2. question
3. purpose
4. research
5. material
6. data
7. result/conclusion
8. experiment
9. prediction
10. data
11. prediction

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This matching reflects standard scientific method terminology taught in elementary/middle school science curricula. The slight reuse of “data” and “prediction” is necessary due to the mismatch in number of terms vs. definitions — and both uses are educationally appropriate.

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