surface tension - deep dive #1

Why Be Curious?

http://www.slideshare.net/jmori2014/surface-tension-deep-dive

What Does It Mean to be CURIOUS?

My Question

I have always wondered about WATER.

How Might We Measure How Strong The Force is that Keeps Water Together?

Surface Tension

http://ice.chem.wisc.edu/Oil/On_The_Surface,_Its_All_About_Nano/Surface_Tension.html

https://www.youtube.com/watch?v=RphuMEUY3Og

https://www.youtube.com/watch?v=NVtPAaPRB3w

https://www.youtube.com/watch?v=Hm52rkh68JA

Our Turn

What do we need?● Water● Pepper● Soap

https://www.youtube.com/watch?v=0nx19B7TD0Q

Experiment Time

Research:

Find out about Surface Tension.Write out about or draw pictures that show SURFACE TENSION.

Hypothesis

Our guess about what the answer might be……-could be based on past experiences

It does not matter if it is right or wrong...it is a starting place.

We can then find out by experimenting!

Tools

● Penny● Pippette● Water

Record DATA

Trial # Number of Drops

1

2

3

Record by Drawing “What You See”

Top View Side View

What were some of our numbers?

Trial # Number of Drops

1

2

3

Why do we have such different numbers?

1. Errors will always happen. 2. Even if we try to repeat the exact same

experiment under the exact same conditions.

What do Errors come from?3. Errors will come from your technique in doing

the experiment, so we must try to make these errors as small as possible

What do We Do?

Take an AVERAGE.What is an average?Add up your numbers and divide by how many numbers you added together.

Example: 4 + 3 + 5 + 4 = 16 16 divided by 4 = 4

Let’s Try

Numbers to Add:

Total, Divided by 3.

Graphing

DescribeScientist ALWAYS describe what they found out from this experiment.

Use your word bank to describe1) What you did2) What you saw3) What was your average number of drops4) Was your HYPOTHESIS close or not...How much?

If you could redo?

What questions might you be CURIOUS to try and figure out next time?

1)

2)