Grade 10 Biology Lab Techniques Worksheet
This worksheet covers fundamental biology lab techniques including microscopy, sterile technique, and solution preparation, suitable for Grade 10 science students.
Includes
Standards
Topics
Biology Lab Techniques
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all calculations where necessary.
1. Which part of the microscope adjusts the amount of light passing through the specimen?
Eyepiece
Objective lens
Diaphragm
Coarse adjustment knob
2. Label the following parts of the microscope:
A. (Used for viewing)
B. (Magnifies the specimen)
C. (Supports the slide)
D. (Moves the stage up/down for initial focusing)
3. Indicate whether the following statements about sterile technique are True or False.
a. It is acceptable to leave petri dishes open on the lab bench for extended periods during inoculation.
True
False
b. Flaming the inoculation loop before and after use helps prevent contamination.
True
False
4. Describe the steps you would take to prepare 100 mL of a 0.5 M NaCl solution from solid NaCl (molecular weight = 58.44 g/mol).
5. Match the lab equipment with its primary function.
i. Beaker
a. Measuring precise volumes of liquid
ii. Graduated cylinder
b. Holding and mixing larger volumes of liquid
iii. Petri dish
c. Culturing microorganisms
iv. Micropipette
d. Transferring very small, precise volumes of liquid
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