33219584
Descripción
Test por Madison Sanford, actualizado hace más de 1 año
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Creado por Madison Sanford
hace casi 3 años
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Pregunta 1
Pregunta
In the science lab how do you gain knowledge?
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reading books
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discussing theories
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doing things
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watching the teacher
Pregunta 2
Pregunta
what must you do if you have an accident?
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don't tell anyone
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notify the teacher
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scream and run away
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clean it up yourself
Pregunta 3
Pregunta
to be safe in the science classroom you must
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pay attention
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follow the rules
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use common sense
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all of these
Pregunta 4
Pregunta
Rules in the lab are designed to protect your
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friendships
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privacy
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skin and eyes
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all of these
Pregunta 5
Pregunta
Always use this size container when you are pouring chemicals:
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large
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small
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medium
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doesn't matter
Pregunta 6
Pregunta
When you are reading the chemical bottles you must note the following information:
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name
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concentration
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hazard warnings
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all of these
Pregunta 7
Pregunta
The proper method for mixing acid and water is to
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acid to water
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water to acid
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it doesn't matter
Pregunta 8
Pregunta
What is the safest way to smell a chemical
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smell it directly by putting your nose over it
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inhale deeply to determine what it is
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waft the smell to your nose using your hand
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all of these
Pregunta 9
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When pouring chemicals:
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use a work tray
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keep your hand on the label area
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immediately stopper chemicals
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all of these
Pregunta 10
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Harmful volatile chemicals which release fumes should be stored in:
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on the lab table
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a fume hood
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in a closed area
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none of these
Pregunta 11
Pregunta
When using chemicals
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recycle unused chemicals
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use clean glassware
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only pour out, never in
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all of these
Pregunta 12
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At the end of every lab activity you must first
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relax
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write up the lab
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clean equipment and hands
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remove your safety glasses
Pregunta 13
Pregunta
Never heat the following using an open flame
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acids
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volatile chemicals
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water
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metals
Pregunta 14
Pregunta
What controls the flow of gas on the Bunsen Burner?
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air inlets
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wing tip spreader
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rubber tubing
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valve
Pregunta 15
Pregunta
when lighting a Bunsen Burner with a match or lighter
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light the match first and then turn on the gas
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turn on the gas before you light the match
Pregunta 16
Pregunta
What controls the amount of oxygen flow into the Bunsen Burner
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air inlets
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wing tip spreader
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valve
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rubber tubing
Pregunta 17
Pregunta
What colour would an ideal flame have
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transparent
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blue
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orange-red
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yellow
Pregunta 18
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If the flame sputters or goes out, you should first
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relight it immediately
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turn off the gas
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notify the teacher
Pregunta 19
Pregunta
We check all glassware before heating it for cracks or stars to prevent it from
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leaking
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bursting or exploding
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glowing
Pregunta 20
Pregunta
Why is it not safe to heat a sealed container?
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the cork could blow out
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the container could burst/explode
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it could burst into flames
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none of these
Pregunta 21
Pregunta
Which method can be used to heat a test tube?
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in a water bath
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never heat a test tube
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moving it back and forth through a flame
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both a) and c)
Pregunta 22
Pregunta
What two substances look the same whether they are hot or cold?
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metals and glassware
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liquids and chemicals
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metals and gases
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liquids and glassware
Pregunta 23
Pregunta
The two types of thermometers used in a science classroom are:
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mercury and bromine
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alcohol and mercury
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alcohol and bromine
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alcohol and water
Pregunta 24
Pregunta
which rule is true for thermometer use?
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shake it down to get a good reading
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you may clean up a broken thermometer
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keep it on a wire screen when not in use
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leave it on the edge of the table for quick use
Pregunta 25
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The most common causes of injury in a science classroom are
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burns
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cuts from glass
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inhalation of fumes
Pregunta 26
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you must never attempt to
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snap a glass tube in half
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insert one end into a hole of a rubber stopper
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seal one end by melting the glass
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all of the above
Pregunta 27
Pregunta
Centrifuges separate
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solids from gases
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solids from liquids
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liquids from gases
Pregunta 28
Pregunta
what can happen if a centrifuge is not evenly balanced?
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explodes
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short circuits
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vibrates violently
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spins faster
Pregunta 29
Pregunta
which of the following must be worn in a science classroom?
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lab coat
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school uniform
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loose sleeves
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closed leather shoes
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both a) and d)
Pregunta 30
Pregunta
what should you do with long hair?
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wear a cap
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tie it up
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nothing
Pregunta 31
Pregunta
why is it important to remove rings, watches and contact lenses if you are going to work with chemicals?
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chemicals may become trapped against the skin
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they can become damaged
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they can react with the chemicals you are using
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all of the above
Pregunta 32
Pregunta
How should you protect your eyes from chemicals and glass shards?
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blink often
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open the windows
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wear safety goggles
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be careful
Pregunta 33
Pregunta
how should you protect your hands when pouring chemicals? Use:
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hot mitts
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safety goggles
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gloves
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tongs
Pregunta 34
Pregunta
The first and most important rule is:
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put yourself first
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no fooling around in the science classroom
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read your procedure once the lab has started
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run to get your chemicals
Pregunta 35
Pregunta
where should personal belongings be kept during a lab activity?
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in the hallway
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in your desk or cupboards
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on lab table
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in the aisles
Pregunta 36
Pregunta
When measuring a substance in a burette or graduated cylinder, your eyes should be
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below the meniscus level
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the same level as the meniscus
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above the meniscus level
Pregunta 37
Pregunta
Why is it important that you never bring in food, drinks or makeup into the science classroom?
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your skin, eyes or mouth could develop a rash or burn
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chemicals may become trapped against the skin
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some chemicals are poisonous or cancer causing
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all of these
Pregunta 38
Pregunta
If a chemical gets in your eyes you must
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ignore it, your tears will remove it
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wash it out for 5 minutes
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wash it out for15 minutes
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spray a chemical to neutralize the reaction
Pregunta 39
Pregunta
if a fire starts in a small container you should
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use a fire extinguisher
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cover it
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evacuate from the building
Pregunta 40
Pregunta
If a person's clothing catches fire they should
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get the safety blanket
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run around to get help
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stop, drop and roll
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go to the eye wash fountain
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