Name: ______Date: ______Block: ______
Investigating the Properties of Water
Directions: Go around to various stations (in no particular order) and fill out this worksheet. After completing the activity, record the notes provided at each station in your journal.
Station A: Pennies
1. How many drops of water do you think will fit on the head of a penny?
Write down your hypothesis.
I think ______drops will fit on the head of a penny.
2. Using a dropper, slowly drop water onto a penny, counting each drop.
a)On your data sheet, draw what the penny looks like, as viewed from the side, before it overflows.
b) How many drops of water did fit on the head of a penny? ______drops
3. Using a different penny, gently smear the top of the penny with a small amount of soap. Now, add water droplets again and count how many droplets the penny holds.
How many drops of water do you think will fit on the head of a penny?
Write down your hypothesis.
I think ______drops will fit on the head of a soapy penny.
a) How many droplets did the soapy penny hold? ______drops
b) Why might there be a difference between the non-soapy penny and the soapy penny?
Station B:Salt
1. Fill the empty Erlenmeyer flask halfway with water using the sink. Now add a pinch of salt and swirl to dissolve.
What happens (or doesn’t) as you swirl to dissolve the salt? ______
2. A container of oil and salt is already on the table. Swirl it to dissolve the salt.
What happens (or doesn’t) as you swirl to dissolve the salt? ______
3. Why is there a difference in reaction between the two? Take your best guess at explaining.
Station C:Paper
1. Take the graduated cylinder and fill the bottom with ___4____mL of water.
Look at the top line of the water.
a)What shape is the water making?
b)What is this called? (See picture)
2. Now take one strip of paper with a dot on the end, and place into the graduated cylinder such that the bottom of the paper (with the dot) barely touches the bottom, and the top of the paper hangs out of the graduated cylinder.
a)Time how long it takes for the water to reach the top of the paper.
How long did it take? ______seconds
b)What happened to the ink as the water climbed the paper?
c) How/why do you think the water climbed the paper?
Station D: Paperclips
1. There is a white bucket of water waiting for you. Using different sized paperclips, see if you can get a paperclip to balance on the surface of the water.
a)Which paperclips were easiest to balance?
b)What is the trick for getting the paperclip to balance?
c)Why is it possible for the paperclip to balance? What does this tell you about water?
Station E: Pools of Water/Oil
- There is a beaker of water and a beaker of oil, each with the same amount. How much is in each container? ______mL
- Take the temperature of each liquid and record:
BEFORE HEATING: Water = ______, Oil = ______- Place both containers on a heated surface for 3 minutes. Take the temp.of each again.
AFTER HEATING: Water = ______, Oil = ______
- Compare the results to the first round. What do you notice? Why is that the case?