Question

Both a triple beam balance and a spring scale are used to measure the weight of an object.

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Why is agar medium used in Petri dishes?(1 point)

Responses

It makes bacteria appear larger.
It makes bacteria appear larger.

It sterilizes the petri dish.
It sterilizes the petri dish.

It helps microorganisms grow.
It helps microorganisms grow.

It makes cells glow.

It helps microorganisms grow.

Which statement accurately describes test tubes and beakers?(1 point)

Responses

Test tubes are better for transferring liquids than beakers.
Test tubes are better for transferring liquids than beakers.

Beakers can be held over a flame; test tubes cannot.
Beakers can be held over a flame; test tubes cannot.

Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.
Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.

Beakers and test tubes both have rounded bottoms.

Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.

Which is a disadvantage of using Celsius thermometers?(1 point)

Responses

They can measure the boiling point of a liquid.
They can measure the boiling point of a liquid.

They can take accurate temperature readings.
They can take accurate temperature readings.

They can contain mercury that is very harmful to humans.
They can contain mercury that is very harmful to humans.

They can measure temperatures of liquids quickly.

They can contain mercury that is very harmful to humans.

What safety equipment is often the minimum requirement for personal protection in a laboratory?(1 point)

Responses

gloves
gloves

safety goggles
safety goggles

fire blanket
fire blanket

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safety goggles

If you were going to be handling harmful chemicals in a lab, what safety equipment would you use to protect your eyes and face?(1 point)

Responses

gloves
gloves

safety glasses
safety glasses

chemical splash goggles
chemical splash goggles

apron

chemical splash goggles

What should you do if you get chemicals into your eyes in a laboratory?(1 point)

Responses

Wipe the chemicals off your face.
Wipe the chemicals off your face.

Go home and take a shower
Go home and take a shower

Locate and use an eye/face wash.

Locate and use an eye/face wash.

Put on safety goggles.
Put on safety goggles.

Locate and use an eye/face wash.

What safety equipment would you use to extinguish a fire that is on a person?(1 point)

Responses

apron
apron

fire blanket

fire blanket

fire extinguisher
fire extinguisher

eye/face wash
eye/face wash

fire blanket

What is the first step to take in order to operate a fire extinguisher?(1 point)

Responses

Squeeze the handle on the top to release the foam-like solution inside the extinguisher.
Squeeze the handle on the top to release the foam-like solution inside the extinguisher.

Aim the nozzle at the fire.
Aim the nozzle at the fire.

Sweep the extinguisher from side to side until the fire is put out completely.
Sweep the extinguisher from side to side until the fire is put out completely.

Pull the pin to break the seal.

Pull the pin to break the seal.

What are oral instructions?(1 point)

Responses

directions that are written down
directions that are written down

directions for complex tasks
directions for complex tasks

directions that are easy to understand
directions that are easy to understand

directions that are spoken aloud

directions that are spoken aloud

Which situation would best be addressed by giving oral instructions?(1 point)

Responses

explaining how to do an experiment
explaining how to do an experiment

giving an opinion about a drawing
giving an opinion about a drawing

telling a story for fun
telling a story for fun

comparing ideas about a book

explaining how to do an experiment

Which step is important for following oral instructions?(1 point)

Responses

describing each step clearly
describing each step clearly

listening carefully
listening carefully

explaining what materials are needed
explaining what materials are needed

establishing a purpose

listening carefully

If you are giving instructions and a listener is confused about a step, what should you do?(1 point)

Responses

Try saying things in a new way.
Try saying things in a new way.

Do the step yourself.
Do the step yourself.

Speak with more confidence.
Speak with more confidence.

Start over until the listener understands.

Try saying things in a new way.

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