Exploring the Scientific Method: Questions, Hypothesis, and Variables

The video reviews the scientific method, emphasizing the steps involved, such as forming a question, identifying variables, and creating a hypothesis. It explains the difference between independent and dependent variables with examples. The video also covers how to write a hypothesis using the 'if, then, because' format and the importance of constant variables and controls in experiments. Finally, it provides class information for further discussion.

What is the first step in the scientific method?

• Collecting data

• Asking a question

• Formulating a hypothesis

• Analyzing results

Which variable is purposefully changed in an experiment?

• Constant variable

• Control variable

• Independent variable

• Dependent variable

Tags

NGSS.MS-PS2-2

In the example 'How does the amount of sunlight affect the height of a plant?', what is the dependent variable?

• Type of plant

• Amount of water

• Amount of sunlight

• Height of the plant

Tags

NGSS.MS-LS2-1

What is the purpose of a hypothesis in an experiment?

• To analyze results

• To identify variables

• To state the expected outcome

• To collect data

Tags

NGSS.MS-PS1-2

Which format is commonly used to write a hypothesis?

• If...then...because

• When...then...because

• How...then...because

• What...then...because

In the hypothesis 'If the deodorant is clinical strength, then there will be less body odor because it has a stronger formula', what is the independent variable?

• Amount of sweat

• Strength of formula

• Type of deodorant

• Amount of body odor

Why are constant variables important in an experiment?

• To ensure the independent variable is the only factor affecting the outcome

• To formulate a hypothesis

• To change the outcome of the experiment

• To measure the dependent variable

Tags

NGSS.MS-PS3-4

Which of the following is an example of a constant variable in the plant height experiment?

• Height of the plant

• Type of plant

• Amount of water

• Amount of sunlight

In the sleep and grades experiment, which factor should be kept constant?

• Amount of sleep

• Type of test

• Grades

• Bedtime and wake-up time

What will be discussed in the first live class?

• Collecting data

• Understanding variables

• Formulating hypotheses

• Experiment proposal project

Tags

NGSS.MS-PS2-2