Cell Sizes

A microscope is an instrument that.

• makes faraway objects look closer.
• makes small objects appear larger.
• decreases the size of small objects.
• increases the size of small objects.

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NGSS.4-PS4-2

Which part is the lighted area you see when looking through the eyepiece?

• coarse adjustment knob
• diaphragm
• field-of-view
• revolving nosepiece

How many microns μm = 1 mm?

• 1,000

• 1,000,000

• 10,000

• 100,000

What does a nanometer (nm) equal to?

• 1 nm = 10^-9 m

• 1 nm = 10^-10 m

• 1 nm = 10⁹ m

The size of an atom of gold is 1.44 x 10^-10 m.

How many atoms of gold could be lined up side by side in a line of 1.44 m?

• 10,000,000,000 atoms

• 1.44 x 10¹⁰ atoms

• 1 x 10^-10 atoms

• 0.0000000001 atoms

How many nano-meters are in 1 meter?

• 10,000,000,000 nm

• 0.000000001 nm

• 1,000,000,000 nm

• 0.0000000001 nm

If the size of a gold atom is (1.66 x 10^-10) m, how many atoms of gold could be lined up side by side in a line of 1.66 m?

• 1.66 x 10¹⁰ atoms

• 1 x 10¹⁰ atoms

• 1 x 10^-10 atoms

How many nano-meters are in 1 cm?

• 10⁶ nm

• 10⁷ nm

• 10⁸ nm

• 10⁹ nm

Why are microscopes important when studying most cells?

• Most cells are very large.
• Most cells are very small.  
• Most cells move very quickly.
• Most cells are dead.