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

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

When gathering glassware and equipment for an experiment, you should:

• read all directions carefully to know what equipment is necessary
• examine all glassware to check for chips or cracks
• clean any glassware that appears dirty
• all of the above

If a chemical is splashed on your skin, immediately wash it with:

• soap
• water
• oil
• another chemical

Matter is anything that occupies ________________ and has ________________ .

• space; mass
• volume; weight
• space; weight
• volume; atoms

Matter in the solid state has a __________ volume and a __________ shape.

• fixed; fixed
• fixed; variable
• variable; fixed
• variable; variable

Matter in the liquid state has a __________ volume and a __________ shape.

• fixed; fixed
• fixed; variable
• variable; fixed
• variable; variable

Matter in the gas state has a __________ volume and a __________ shape.

• fixed; fixed
• fixed; variable
• variable; fixed
• variable; variable

Which of the following is an example of plasma?

• stars
• neon signs
• lightning
• all of these are examples of plasma

Matter that has a uniform and definite composition is called a ________________ .

• pure substance
• heterogenous mixture
• homogenous mixture
• solution