Physical and chemical changes
Materials Activity One: 4 pieces of paper Scissors |
Materials Activity Two: Calcium Chloride (order from any
science company) Baking Soda 15 pint Ziploc bags (not the
zipper type) 15 small plastic medicine
bottles 15 goggles 15 pairs disposable gloves 15 plastic spoons |
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General
Directions Physical Changes Students will cut a hole in an ordinary piece of
paper that they will be able to walk through without tearing the paper. 1.
Fold
the paper in half like a hot dog. 2. Make a series of
straight cuts from the folded side edge, stopping one cm from the other side. 3. Turn the paper around
and make cuts from the unfolded side to the folded side, stopping two cm from
the edge. 4. Except for the first and
last strip
at the ends of the paper, snip off the folded ends of the strips about one cm
into the paper. 5. Carefully open up the
paper. |
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General
Directions Chemical Changes Students will witness chemical changes involving
two powders. Calcium Chloride is used to clear icy roads. 1.
Put
one level spoonful of baking soda in the plastic bag. 2. Put 2 level spoonfuls of
calcium chloride into the bag. 3. Shake the substances
together and observe. 4. Fill the medicine bottle
half full of water. Carefully put the uncapped bottle in the bag so that the
bottle is sitting still. 5. Carefully close the
plastic bag, squeezing the air out of it. 6. Zip the bag shut – make sure
it is sealed. 7. Tip the bag to spill the
water into the calcium chloride and baking soda. |
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