Science

When viewing a sample of onion cells using a microscope, the student placed the cells on a slide and placed a coverslip over it. What is the purpose of the coverslip?

• To protect the onion.

• To keep the cells flat.

• To make sure the onion cells do not fall of the slide.

• To get a better view of the cells.

Which two parts of a microscope combine to give a magnified view of a cell?

• Eyepiece and objective lens

• Light source and objective lens

• Eyepiece and focus knob

• Stage and eyepiece

Which one of the following instruments would you use to see a plant cell?

• Periscope

• Microscope

• Scanner

• Stethoscope

Scanning Electron Microscope has this basic function. Which of the following is it?

• This microscope transmits a beam of electrons through the sample to form an image and can be used for viewing thin samples.

• This microscope uses mirrors to collect light that illuminates the image and uses two lenses for magnification.

• This microscope produces images by scanning the surface of a sample using electron beams.

• This microscope reflects abundant light for more visible sample because it has the most number of lens.

If the eyepiece of a microscope magnifies by 10, and the objective lens magnifies by 4, then what is the total magnification of the microscope?

• 50

• 160

• 40

• 80

This is turned to bring the object being viewed closer. Which part of the microscope is this?

• Objective Lens

• Coverslip

• Eyepiece Lens

• Focus Knob

This microscope has 3 draw tubes with lenses placed at the end of the tubes. It is also the first ever known microscope. What is this?

• Confocal Microscope

• Basic Microscope

• Jansen l Microscope

• Transmission Electron

This type of microscope uses a dye to create magnified and contrasting images.

• Fluorescence Microscope

• Pigment Microscope

• Confocal Microscope

• Electron Beam Microscope

Microscope it used to magnify very small objects. How does it help in scientific basis?

• It is used to reduce the size of an object or microorganisms.

• It is used to see far away objects clearly.

• It is used to relive, distinguish and magnify objects, specimen or microorganism at cellular level which our eyes alone cannot perceive

• It is used to visualize organisms in an undetailed manner.

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Which of the following made up matter?

• Cells

• Organelles

• Organs

• Atoms

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