Which of the following is NOT a safe lab practice?
a. Tying back long hair
b. Eating snacks during an experiment
c. Wearing goggles when using chemicals
d. Reporting accidents immediately
b.
What is the first thing you should do if a chemical spills on the floor?
a. Wipe it up with paper towels
b. Report it to the teacher right away
c. Ignore it if it’s small
d. Wash your hands
b.
Why should broken glass never be placed in the regular trash can?
a. It can cause injuries to others
b. It will melt the trash bag
c. It can explode under pressure
d. It will contaminate the recycling
a.
When heating substances in a test tube, you should:
a. Point the open end toward your face
b. Leave the tube unattended
c. Point the open end away from people
d. Use your hand to check the heat directly
c.
What safety symbol would warn you about flammable materials?
a. Flame
b. Radiation
c. Biohazard
d. Broken glass
a.
The part of the microscope that you look through is the:
a. Objective lens
b. Eyepiece
c. Diaphragm
d. Nosepiece
b.
Which part supports the microscope and provides stability?
a. Arm
b. Stage
c. Base
d. Eyepiece
c.
Which knob should only be used under low power to avoid damaging the slide?
a. Coarse adjustment knob
b. Fine adjustment knob
c. Stage clips
d. Diaphragm
a.
The function of the diaphragm is to:
a. Hold the slide in place
b. Regulate the amount of light
c. Magnify the specimen
d. Support the eyepiece
b.
A microscope has a 10x eyepiece and a 40x objective. What is the total magnification?
a. 40x
b. 400x
c. 50x
d. 100x
b.
Why should you start focusing with the low-power objective first?
a. It makes the image blurry
b. It prevents damage to the slide and lens
c. It increases light intensity
d. It shows the specimen in color
b.
The flat platform where the slide is placed is called the:
a. Stage
b. Base
c. Arm
d. Nosepiece
a.
Which microscope part moves the stage in small, precise steps?
a. Coarse adjustment knob
b. Fine adjustment knob
c. Diaphragm
d. Stage clip
b.
Which part rotates to change between different objective lenses?
a. Arm
b. Base
c. Nosepiece
d. Eyepiece
c.
If you move the slide to the left under the microscope, the image will appear:
a. Left
b. Right
c. Upside down
d. Unchanged
b.
The factor that a scientist deliberately changes is the:
a. Dependent variable
b. Independent variable
c. Control
d. Constant
b.
The variable that changes in response to the independent variable is the:
a. Control
b. Dependent variable
c. Hypothesis
d. Constant
b.
A control group is:
a. The group exposed to all variables
b. The group used for comparison
c. The group with the dependent variable
d. The group that always proves the hypothesis
b.
Which of the following is a constant in an experiment testing water amount on plant growth?
a. Type of soil
b. Amount of water given
c. Plant height
d. Rate of growth
a.
Which step of the scientific method involves making an “if…then” prediction?
a. Hypothesis
b. Conclusion
c. Observation
d. Data collection
a.
Which is an observation?
a. The plant is 12 cm tall
b. The plant grew tall because of sunlight
c. The plant looks healthier than the other
d. The plant will keep growing
a.
Which is an inference?
a. The beaker contains 200 mL of liquid
b. The solution is blue
c. The liquid evaporated because of heat
d. The thermometer shows 25°C
c.
Which is qualitative data?
a. The leaf is green
b. The leaf is 5 cm long
c. The plant weighs 120 g
d. The flower has 12 petals
a.
Which is quantitative data?
a. The water is clear
b. The insect is red
c. The sample contains 30 seeds
d. The solution smells sweet
c.
