Question

name ____ class date __

1. circle the letter of the activity that involves using the senses to gather information directly.

a. forming a hypothesis
b. making an observation
c. planning an experiment
d. analyzing data

1. what do scientists do if the results of an experiment do not support the hypothesis?

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1. the ______________ variable is changed during an experiment.

the ______________ variable is observed during an experiment.

1. is the following sentence true or false? once a theory has been accepted, no experiment will ever disprove it. ______________

1. what is a scientific law?

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Explanation:

Question 7

• Option a: Forming a hypothesis is a proposed explanation, not using senses to gather info.
• Option b: Making an observation involves using senses (sight, hearing, etc.) to collect data, which matches the description.
• Option c: Planning an experiment is about designing the procedure, not direct info - gathering with senses.
• Option d: Analyzing data is about interpreting collected info, not gathering it with senses.

When experimental results don't support the hypothesis, scientists will typically re - evaluate the hypothesis. They may revise the hypothesis based on the new data, or they may design a new experiment to test the hypothesis again (maybe with different variables or conditions) to get more accurate results.

• In an experiment, the independent variable is the one that the experimenter deliberately changes. For example, in an experiment testing the effect of temperature on plant growth, temperature is the independent variable.
• The dependent variable is the one that is observed or measured to see how it responds to the change in the independent variable. In the plant growth example, the growth of the plant (height, number of leaves, etc.) is the dependent variable.

Answer:

b. making an observation

Question 8