Scientific Investigation

the factor that is changed by the scientist in a science experiment.

• dependent variable

• independent variable

• constant

• hypothesis

the factor that is measured in the science experiment.

• constant

• independent variable

• hypothesis

• dependent variable

a prediction that can be tested.

• constant

• variable

• hypothesis

• dependent variable

What must you do before you make a hypothesis?

• Run an experiment

• Make observations

• Form a theory

• Draw conclusions

Part of lab safety includes reading the lab procedure...

• before doing the lab

• while doing the lab

• after doing the lab

• only if you think you really need it

What should you do if you break glass in the lab?

• Tell the teacher.

• Sweep up the glass.

• Pick up the glass with your hands.

• Ignore it; the teacher will clean it up when she sees it later.

Keeping your work area neat and clean is important because:

• My teacher is a neat-freak
• I won't lose my supplies in the clutter.
• It keeps the room from looking messy.
• It helps prevent accidents.

Horseplay, jokes, and running in the laboratory room are

• allowed if nobody gets hurt

• okay if teacher's not looking

• always against the rules

• allowed if there is no laboratory activity

Mercury has spilled in the laboratory. What should you do?

• Run away from the lab

• Stay away from the location and immediately tell the teacher

• Continue to break more thermometers

• Hide under the table

Which one of these items are allowed in a laboratory?

• open toed shoes

• baggy clothes

• gum and food

• safety goggles