Let's solve each question on the
Science Vocabulary worksheet step by step and explain the answers.
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1. This variable can be controlled and changed.
✔ Answer: Independent Variable
Explanation:
In an experiment, the
independent variable is the one that the scientist deliberately changes or manipulates to observe its effect. It is "independent" because it does not depend on other variables in the experiment.
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2. A hypothesis which states that there is no difference in the variable.
✔ Answer: Null Hypothesis
Explanation:
The
null hypothesis is a statement that there is
no effect or
no difference between groups or variables. Scientists test this hypothesis to determine if their results are statistically significant. If data contradicts the null hypothesis, it suggests the alternative hypothesis might be true.
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3. Research that uses numerical data.
✔ Answer: Quantitative Research
Explanation:
Quantitative research involves collecting and analyzing
numerical data (numbers) to identify patterns, relationships, or trends. Examples include measuring temperature, counting occurrences, or recording time.
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4. This is often likely to be true compared with a hypothesis because it has evidence that serves as proof.
✔ Answer: Theory
Explanation:
A
theory is a well-substantiated explanation of some aspect of the natural world that is supported by a large body of evidence. Unlike a hypothesis (which is a proposed idea), a theory is
not just a guess — it’s based on repeated testing and observation. So, a theory is more likely to be true than a hypothesis because it has
strong evidence backing it.
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5. How can a hypothesis be tested?
✔ Answer: Experiment
Explanation:
A
hypothesis is tested through an
experiment. In an experiment, scientists design procedures to collect data and determine whether the hypothesis is supported or refuted. The experiment allows them to manipulate variables and observe outcomes under controlled conditions.
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✔ Final Answers:
| Question | Answer |
|--------|--------|
| 1. This variable can be controlled and changed. |
Independent Variable |
| 2. A hypothesis which states that there is no difference in the variable. |
Null Hypothesis |
| 3. Research that uses numerical data. |
Quantitative Research |
| 4. This is often likely to be true compared with a hypothesis because it has evidence that serves as proof. |
Theory |
| 5. How can a hypothesis be tested? |
Experiment |
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These terms are foundational in the
scientific method, helping students understand how scientific investigations are structured and evaluated.
Parent Tip: Review the logic above to help your child master the concept of scientific method worksheet grade 3.
