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Lab Safety
Equipment, Procedures, and Safety
| Question | Answer |
|---|---|
| When using a graduated cylinder to measure the volume of a liquid, which of the following indicates the liquid's volume? | bottom of the meniscus |
| Why are beackers and flasks NOT used to measure liquids? | Their markings do not give accurate and precise measurements |
| Which of the following would be the best to measure 18mL of ethyl alcohol accurately and precisely? | a 25mL graduated cylinder marked in 1mL increments |
| Which of the following would be the best choice to mix and store small amounts of a liquid? | capped test tube |
| One advantage of using a light microscope is that it-- | can be used to view living cells |
| When the high power objective is being used, you should focus a light microscope by using the-- | fine adjustment knob |
| Objects viewed through a microscope are usually measured in units called-- | micrometers |
| When making a slide, the specimen should be-- | thin enough for light to pass through it |
| How should you remove extra water from a wet mount slide? | Hold a paper towel to the edge of the coverslip |
| If a microscope's ocular is marked 10x and the low power objective is marked 2x, what would be the total magnification when using the low power objective? | 20x |
| One disadvantage of using an electron microscope is that it-- | can't view living cells |
| What is the method used to remove air bubbles under a slip cover? | tap gently with a pencil eraser |
| What is the purpose of the coverslip? | It helps hold the specimen in place |
| Where is the hottest part of a Bunsen burner flame? | at the top of the inner flame |
| How should you handle glassware if you are unsure whether or not it is hot? | Assume it is too hot to touch and use appropriate clamps, tongs, or gloves |
| When heating materials in a test tube, you should hold the test tube with-- | a test tube clamp |
| When thinking about lab safety, the letters PASS refer to-- | the fire extinguisher |
| The foam or chemical from a fire extinguisher should be sprayed-- | at the base of the flames |
| When any accident occurs during a lab activity, you should -- | always report it to the teacher |
| Leftover chemicals should be disposed of by-- | following the teacher's directions |
Created by:
Biology1
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