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What is a possible answer or explanation to a question based on knowledge, observations, and research?

HINT: It is often written in "if...then" format.

• Observation

• Hypothesis

• Experiment

• Conclusion

Answer explanation

A hypothesis should by a clear and simple statement that can be tested.

Will our results always support our hypothesis?

Why is it important to write down your procedure?

• So that I can photocopy it for my friends.

• To take up more class time.

• So that other scientists can repeat it.

• So that I don't have to do it later.

Answer explanation

A procedure should be written clear enough so that other scientists can duplicate the experiment exactly.

What do we do if a part of the procedure isn't working?

The information gathered from making observations is called ____.

• data
• experiment

• graph

• procedure

What is an independent variable?

• The variable being tested or changed by the scientist, also known as the manipulated variable.

• The variable that the

  scientist is measuring or

  observing, also known as the responding variable.

• The variables that the scientist keeps constant, which allows them to attribute the results to the independent variable alone.

How many independent variables should we change when conducting an experiment?

• 1

• 2

• 3

• As many as we want

What is the independent variable in the following scenario?

"The blood pressure of a soldier is measured while he is resting. The soldier is then exposed to a stressful environment and his blood pressure is measured again."

• the environment

• the soldier

• blood pressure

• none of the above

What is a dependent variable?

• The variable being tested or changed by the scientist, also known as the manipulated variable.

• The variable that the

  scientist is measuring or

  observing, also known as the responding variable.

• The variables that the scientist keeps constant, which allows them to attribute the results to the independent variable alone.

What is the dependent variable in the following scenario?

"The blood pressure of a soldier is measured while he is resting. The soldier is then exposed to a stressful environment and his blood pressure is measured again."

• the environment

• the soldier

• blood pressure

• none of the above

What is a controlled variable?

• The variable being tested or changed by the scientist, also known as the manipulated variable.

• The variable that the

  scientist is measuring or

  observing, also known as the responding variable.

• The variables that the scientist keeps constant, which allows them to attribute the results to the independent variable alone.

What is the controlled variable in the following scenario?

"The blood pressure of a soldier is measured while he is resting. The soldier is then exposed to a stressful environment and his blood pressure is measured again."

• the environment

• the soldier

• blood pressure

• none of the above