Unit 0: Lab Safety & Scientific Investigation

Approved eye protection devices (such as goggles) are worn in the laboratory

•  to avoid eye strain
• to improve your vision
• only if you don’t have corrective glasses
•  any time chemicals, heat or glassware are used

Dependent variable means

• the scientist controls what to test
• educated guess
• ask a question
• what is being measured

This variable in an experiment is the one being changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

If you break glassware in the lab, you should...

• Tell the teacher
• Clean it up quickly before the teacher notices
• Scream at the top of your lungs

The variable(s) you keep the same in a science experiment

• Independent variable

• Dependent variable

• Control variable

Identify the Independent variable from this question......

What brand of bleach whitens spaghetti stains on clothes better?

• Clothes whiteness

• Stains

• Brand of bleach

• None of the above

Select the lab safety rules that are being broken

• No eating & drinking in the lab

• Alway keep aisles clear

• Anytime a chemical, heat, or glassware are used lab safety goggles are required.

• Dress properly

When you draw a conclusion you should always accept or reject what?

• analysis

• question

• hypothesis

• data

I opened the cabinet and a smell hit me like a ton of bricks. An entire loaf of bread was molded. I wonder if bread molds faster in the direct sunlight or in darkness.

Which is a correct hypothesis statement?

• Bread molds faster in the sunlight

• If I put bread in the sun then it will mold faster.

• Bread molds either way

• None of the above

Which is NOT a step in the scientific method?

• Make observation
• Form a theory
• Collect data
• Form a hypothesis