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The second step in scientific method is

• Data

• Observation

• Hypothesis

• Experiment

Anything that can change and have different values in an experiment is called

• number

• variable

• volume

• height

What do scientists call the variable that is being measured?

• independent variable
• constant variable
• control variable
• dependent variable

What do the scientists call the variable that is changed?

• independent variable
• dependent variable
• control variable
• constant variable

How many different independent variable can we have in a fair test?

• Two
• There is no independent variable in a fair test

• None

• One

A _________ is an experiment in which only one variable is changed by the scientist.

Which of the following rules is very important to follow when working in a laboratory?

• Mix chemicals without asking the teacher

• Run or play

• Smell and taste anything

• Be careful when working with flames

When doing experiments it is important to be safe. You must wear

• a party hat
• swim goggles
• a superhero cape
• personal protective equipment

What should you do with long hair when working in a lab?

• Flammable

• Throw them in the regular trash
• Tie it back (up)

• Eat and drink

What do scientists wear to protect their hands during experiments?

• Baseball gloves
• Safety gloves

• Hand masks

• Sunglasses