Unit 2 | ES I | icroscopy/Measuring with Microscopes

A is pointing to the...

• Objective Lens

• Stage

• Fine Focus Knob

• Eye Piece

• Slide

B is pointing to the...

• Objective Lens

• Stage

• Fine Focus Knob

• Eye Piece

• Slide

C is pointing to the...

• Objective Lens

• Coarse Focus Knob

• Fine Focus Knob

• Eye Piece

• Slide

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

D is pointing to the...

• Objective Lens

• Coarse Focus Knob

• Fine Focus Knob

• Eye Piece

• Slide

E is pointing to the...

• Objective Lens

• Coarse Focus Knob

• Fine Focus Knob

• Eye Piece

• Slide

F is pointing to the...

• Objective Lens

• Coarse Focus Knob

• Fine Focus Knob

• Eye Piece

• Slide

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

This question is to get you thinking about HOW scientists are able to view samples under a microscope and what role LIGHT plays. Choose the TRUE Statement below.

• 
• 
• 

Answer explanation

Light must move through the sample towards your eye in order for you to be able to view the sample.

Order the steps for focusing a specimen under a microscope.

• Decide which OBJECTIVE LENS you would like to use.

• Use the COARSE focus knob to bring the specimen into focus.

• Use the FINE focus knob to bring the specimen into even finer focus.

• Turn on the LIGHT.

• Looking through the EYE PIECE, place the specimen in the field of view of the microscope.

Match the microscope part with its function

• Fine Focus Knob

• Lens at the top of the microscope that the user looks through (commonly magnifies the sample by 10x)

• Coarse Focus Knob

• A second lens that further magnifies the sample. Most microscopes have several with different magnifications.

• Stage

• Small knob that moves the stage over a short distance to refine the focus.

• Eye Piece

• Platform where a slide is placed

• Objective Lens

• Large knob that moves the stage up and down to focus the sample.

The total magnification is the product of the EYEPIECE magnification and the OBJECTIVE LENS magnification.

• True

• False