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WorksheetsNPS EL Crystal Ornament Xmas
Total questions: 24
Worksheet time: 22mins
In order to participate in the lab tomorrow, I must receive (a) or higher in this assignment.
Scale and heat glove are needed (a) .
Which material is needed per student?
pipe cleaner
hot plate
beaker
stirring rod
Which material is needed per student?
styrofoam/paper cup
borax salt
weighing boat
scoopula
Which material is shared between two students?
hot plate
pipe cleaner
styrofoam/paper cup
a piece of yarn
Which material is shared between two students?
borax salt
food coloring
wooden stick
a piece of yarn
Organize these materials into the right categories
scale
pipe cleaner
hot plate
beaker
paper cup
heat glove
In Step 1, you will fill the (a) with about (b) of water.
In Step 2, what should you do while the water is boiling?
measure 67 g of borax salt
pour the boiling water into cups
add 5 drops of food coloring
In Step 2b, what should you do?
write your name and period on the cup
create any shape with a pipe cleaner
measure 67 g of borax salt
In Step 2d, what is the purpose of the yarn?
to hang the pipe cleaner on a wooden stick
to stir boiling water
to decorate the beaker
In Step 3, it asks you to boil water vigorously. What should you observe in water?
Water is getting colder and eventually becomes an ice.
Bubbles forming and steam is rising to the surface.
In Step 4, what should you do after dissolving borax salt?
unplug the hot plate
turn off the scale
add 5 drops of food coloring
In Step 5, you will pour the boiling water evenly into (a) cups.
In Step 6, how many drops of food coloring should you add to your cup?
(a)
According to Step 8, where should you place the wooden stick?
According to Step 8, the pipe cleaner (a) touching the bottom of the cup.
In Step 8, why does it ask you not to agitate the cup?
it will disrupt the formation of crystals
it will shatter the cup
because the cup is too hot to handle
According to Step 9, how long should you wait to see the crystals?
overnight
2 days
2 hours
According to Step 9, crystals will grow on the (a) .
In the clean up procedure, what should you do with the hot plate?
unplug the hot plate
return the hot plate to the cabinet
wipe the hot plate
According to the clean up procedure, what should you do with a used weighing boat?
return it to Lab 9
throw away in a regular trashcan
rinse it with water
According to the clean up procedure, what should you do with unused chemicals?
throw it away in a trashcan
return it to Lab 9
take it home with you
Ask Ms. Chang to get stamped after receiving 70% or higher on this assignment.
ok
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