avcn2 trắc ng 3 đề thiết bị
23 câu hỏi
A(n) analytical balance is an enclosed device that is used to find very precise measurements of mass.
desiccator
microscope
analytical balance
balance
A(n) __________ prevents direct contact with hazardous liquids.
hot plate
stirring rod
tubing
burner
__________ are for transferring substances. Do not store materials in these containers for long periods.
Test tubes and burets
Beakers and Erlenmeyer flasks
Droppers and pipettes
Mortars and pestles
__________ is a microscope mechanism that moves the objective lens toward or away from the specimen.
Fine focus
Coarse focus
Magnification
Slide
A(n) __________ is a tube that is wide at one end and narrow at the other, and is used to guide a substance from one container into another.
clamp
tubing
dropper
funnel
The __________ connects a microscope's two lenses.
arm
stage
head
base
A(n) __________ is a device that is used to secure something in a particular place and prevent it from moving.
tongs
balance
forceps
clamp
Which of the following equipment is used to change substances?
pH meter
analytical balance
microscope
orbital shaker
A(n) ______ is a cylindrical, wide-mouthed container with a flat base that is used to store, measure, and pour substances.
Erlenmeyer flask
beaker
funnel
dropper
Choose the word/phrase that is similar in meaning to the underlined part.
The scientist created a powder in the bowl in which materials are crushed.
pestle
mortar
desiccator
volumetric flask
A(n) ______ is a sealable container, which is used to preserve items that are sensitive to moisture.
desiccator
incubation oven
thermometer
analytical balance
The scientist adjusted the ______ to match the position of her eyes.
objective lens
fine focus
ocular lens
coarse focus
A(n) ____ is a device with a burner that is used to heat materials.
thermometer
centrifuge
incubation oven
hot plate
An analytical balance is more precise than other types of balances, and yields much more ______measurements of mass
extensive
productive
accurate
incorrect
Which of the following equipment is used to change substances?
pH meter
orbital shaker
microscope
analytical balance
__________ are a hinged tool used to grasp objects.
forceps
tongs
clamp
hot plate
A(n) __________ is a device that vigorously moves a container of liquid in order to mix its contents.
balance
thermometer
centrifuge
orbital shaker
A(n) __________ is a round, narrow container that is used to precisely measure the volume of a substance.
volumetric flask
test tube
Erlenmeyer flask
graduated cylinder
Please put 2 _____(s) of cleaning solution in each ear. Use a dropper.
drop
tsp
tbsp
mcg
Spreading materials is much easier with a __________.
tubing
pestle
spatula
clamp
Which of the following equipment is used to measure substances?
microscope
pH meter
orbital shaker
incubation oven
A(n) __________ is a document that provides product safety information.
fume hood
glove
MSDS
safety can
Which of the following lab equipment is used for measuring substances?
graduated cylinder
pipette
funnel
wash bottle
