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Ninth Grade (Grade 9) Lab Practices and Tools Questions

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Grade 9 Lab Practices and Tools
What process makes fine details more clearly visible?
  1. magnification
  2. reflection
  3. resolution
  4. refraction
Grade 9 Lab Practices and Tools
A biologist wishes to use a microscope to observe changes in fine detail in a bacterial culture over a period of time. He wishes to observe the culture closely but does not want to harm the bacteria. Which is the best microscope to use for this experiment and why?
  1. The biologist should use an electron microscope. Not only does this type of microscope have greater resolving power than an electron microscope, but the sample will remain alive as well.
  2. The biologist should use a light microscope. Not only does this type of microscope have greater resolving power than an electron microscope, but the sample will remain alive as well.
  3. The biologist should use an electron microscope. Although this microscope will require that the sample is not living, the resolving power will be considerably more powerful than a light microscope.
  4. The biologist should use a light microscope. Although this microscope has less resolving power than an electron microscope, the sample will remain alive.
Grade 9 Lab Practices and Tools
What will happen if a pupil refuses to operate by the safety rules when using the Bunsen burner?
  1. The pupil will be withdrawn from the experiment immediately.
  2. The pupil can carry on with the experiment but will receive a failing mark for the day's work.
Grade 9 Lab Practices and Tools
What type of hazard is indicated by the symbol?
Hazard Sign - Biohazard
  1. a chemical hazard
  2. a biohazard
  3. a radiation hazard
  4. a fire hazard
Grade 9 Lab Practices and Tools
What two things must all measurements have in order to be clear?
  1. number and distance
  2. number and size
  3. unit value and size
  4. number and unit value
Grade 9 Lab Practices and Tools
Under high power, which knob do you use to adjust the focus of a microscope?
  1. coarse
  2. fine
  3. ocular
  4. focus
Grade 9 Lab Practices and Tools
How would you determine the volume of an irregular solid?
  1. length x width x height
  2. using an electric balance
  3. water displacement
  4. none of the above
Grade 9 Lab Practices and Tools
Which task would the laboratory equipment shown be most useful for?
Lab Tool - Measuring Cylinders
  1. measuring 450 milliliters of water
  2. measuring 15 milliliters of vinegar
  3. weighing 200 grams of baking soda
  4. transferring powered chemicals from a bottle
Grade 9 Lab Practices and Tools
If a healthcare worker wanted to view a highly detailed image of a virus attached to the surface of a cell, which microscope would be the best choice?
  1. compound light microscope
  2. scanning electron microscope
  3. simple light microscope
  4. transmission electron microscope
Grade 9 Lab Practices and Tools
What are the items shown?
Lab Tool - Droppers
  1. beakers
  2. pipettes
  3. droppers
  4. test tubes
Grade 9 Lab Practices and Tools
If acid is splashed on your skin, you should
  1. immediately wash the area with soap.
  2. immediately wipe the area with a paper towel.
  3. immediately wash the area with water.
  4. immediately wipe the area with your lab apron.
Grade 9 Lab Practices and Tools
Which task would the laboratory tool shown be most useful for?
Lab Tool - Mortar And Pestle
  1. storing chemicals
  2. crushing solid chemicals into powder
  3. holding glassware over a Bunsen burner
  4. transferring powered chemicals from a bottle
Grade 9 Lab Practices and Tools
The technical method of disposing of extra chemicals is to                                .
  1. drink them
  2. pour them down the drain
  3. follow the teacher's directions
  4. return them to their containers
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