Apparatus Maintenance, Storage, Improvisation, and Review

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. Why are soft iron keepers placed across the poles of stored bar or horseshoe magnets?

   • A. They complete a magnetic loop that helps keep the magnetic domains aligned
   • B. They make the magnets permanently stronger
   • C. They stop the magnets from conducting electricity
   • D. They are only used to stop the magnets from rusting

2. 2. A learner wants to clean the eyepiece and objective lenses of a microscope. What is the correct way to do this?

   • A. Rub them with a dry duster rag
   • B. Wipe them with the sleeve of a school shirt
   • C. Wipe them gently with lens paper
   • D. Scrub them with paper towel and detergent

3. 3. Wanjiru's group builds an improvised filter from a cut plastic bottle, gravel, sand, charcoal and cotton wool. They use it to clean muddy river water. What must they do before the filtered water is safe to drink?

   • A. Nothing, because the charcoal removes all germs
   • B. Boil it to kill disease-causing microorganisms
   • C. Pour it through the filter a second time
   • D. Store it in a plastic bottle in the sun for an hour

4. 4. A learner views an onion epidermis wet mount under a microscope. The eyepiece lens is 10× and the low-power objective lens is 4×. What is the total magnification?

   Type your answer (in ×) in the lesson.

5. 5. What name is given to a structured, up-to-date register that records the stock counts, condition and location of laboratory apparatus?

   Type your answer in the lesson.

More in Laboratory Apparatus & Instruments

• ▸Optical Instruments The Light Microscope
• ▸Operating the Light Microscope
• ▸Electrical Instruments
• ▸Magnetic and Static Electricity Apparatus

See every Grade 7 Integrated Science lesson →