a teaspoon of salt into the vinegar until it has dissolved. Choose a penny.
Draw both sides of the penny, noting the location of any discoloration. Drop a
penny into the liquid mixture. Watch it for 2 minutes. Use the spoon to take it
out. Note any changes in appearance on your original drawing. Drop the screw
into the liquid and let sit for 1 minute. Observe the screw in the liquid with
the magnifying glass. Record your observations. Put your paper cup and penny at
the back of the station.
a paper towel under your canister. Add 1 milliliter of vinegar to the film
canister that contains baking soda, and quickly put the lid on. Record your
observations. Place the lid and canister at the back of the station.
add 50 milliliters of water to the granules in your cup. Record your
observations. Dispose of the cup in the garbage bag at the station.
50 milliliters of water in the bag. Flatten the bag to remove the air. Seal the
bag most of the way. Put a tablet in the bag and hold it at the top of the bag
while you finish sealing it. Drop the tablet into the liquid. Observe and
record the results. Dispose of the sealable bag in the station's garbage bag.
15 milliliters of cabbage juice in a bag. Add 1 teaspoon of vinegar. Seal the
bag and shake. Record what you see. Place 15 milliliters of cabbage juice in a
second bag. Add 1 teaspoon of baking soda. Seal the bag and shake. Record your
observations. Dispose of the sealed bags in the garbage bag at the station.
about 20 milliliters of water to the cornstarch in the bowl and stir. Gradually
add more water and use your hands to mix the substance until all of the
cornstarch is wet (your mixture should not be runny or powdery). Squeeze the
mixture in your hand. What happens? Now just hold it in your hand. What
happens? Record your observations. Put the mixture in the bowl when you are
done and place the bowl at the back of the station.