Answer to key questions (page 50)

Simulator

I noticed that when the frequency and amplitude would react together the more amplitude that there was the higher the wave would be, also by increasing the frequency the waves would come faster and closer together.
Also when there is a barrier the waves will bounce back the proceed to bounce around the barrier on either side. Once on the other side they increase in their frequency but decrease in amplitude.

Wave Lab- DIFFERENT LIQUIDS

I. GUIDING QUESTION/S (State the guiding question/s): How does a wave travel in various liquids? (speed and behavior)

II.HYPOTHESIS: If you have an idea about why something happens, make an educated guess, or
hypothesis that you can test. What do you predict will occur? I think that the thicker the substance the less frequency there will be.

Materials:
-Bucket
- water
- dish soap with water (made bubbles)
- vinigar
- aquarium
-marker

III. Exploration (PLAN & DO A TEST)

(Procedure) Lists the steps required to replicate the

experiment:

1. poor your starting liquid into the bucket

2. create waves using a marker and watch how the waves react (frequency, wavelength, etc...)

3. once you have tested this dump out your starting liquid and move on to the next. Continue this for the next 3 or 4 (if you decide to add one) until your observations are complete.

IV. RECORD & ANALYZE (Observe carefully and write down, or record,
everything that happens. When you finish
collecting data, you may need to do some
calculations with it.)

A. Data Tables:
Give proper title of table and column headings
Use an appropriate orientation
Make correct computations
Use units of measure
Observe significant figures and rounding-off
rules

	Bubbles	Hand Sanitizer	Water
Frequency	1 wave every 1.25 seconds	1 wave every 1.06 seconds	1 wave every 1.25 seconds
Observations	I found that the waves traveled faster in the bubbles traved faster with the bubbles than with the hand sanitizer the wave length was also longer with the bubbles than with the hand sanitizer.	The hand sanitizer did create waves, however it was very stiff. Leading to low frequency and wave length. It did however react. :)	The water definetly (i think) traveled the most fluently (Easier to see etc...) I also think that even though the results were similar to the bubbles i think that the waves moved with more precision and fluency.

IV. Concept Acquisition (CONCLUSION): State the guiding question.
Present the relevant experimental results. Discuss the
relationship between variables. What can you conclude?
Was your prediction correct? If yes, explain. If no,
explain what you understand now about this investigation
and how it taught you something new. My prediction was that the gooeyer the liquid/ substance the lower the frequency would be, and according to my data my hypothesis was correct. I think that this happened because of the way that the waves lost speed so quickly almost as though there was something pushing against it (even though there wasn’t,) I also think that the water moved easier because it was in a way more liquefied/ thinner liquid; making it easier to react when a disturbance is caused.
V. Concept Application (FURTHER INQUIRY): Examine the validity of
your data and infer what you think the major causes of
error may have been. Propose methods of improvement. For
example, what modifications did you need to make or would
make next time? Whatever happens in a test, think about all
the reasons for your results. Sometimes this thinking
leads to a new hypothesis. Write down these new hypotheses
(predictions) or inquiries (questions) you may have here in
this section.
I think that one way that i could definitely improve my experiment is the way that i set it up, because every liquid that i tested was in a different container (due to different obstacles) so i think that that was one thing that probably effected my results. I also think that if i was to add something/ look further into this topic i would probably wee how things that aren’t classified as a liquid but are close (e.g. jello) and see how the waves differ from those.

What happens when a wabe hits a surface?

My partner (Jude) and I noticed the the ball shaped objects would ricochet of of the wall in a symmetrical manner towards the angle of incidence. We also realized that the heavier the object was the narrower the (in the image shown above) reflective ray and angle of reflection would be. Also the lighter the object the more "wonky" it would go. I found this interesting because I thought that the material would affect the reflective ray of the object more than the weight would but it turned out to be the opposite.

Reflection: interacting mini waves experiment

1 marker no barrier
2 markers no barrier
2 markers 1 barriers
2 markers 2 barriers

For this experiment my partner (Riena) and I noticed that the waves would always interact even if their was a barriers in between, if this was the case the waves would bounce around the barrier and meet on the sides. this is probably what i found most interesting. However, I had predicted that when you were using two markers yet there was no barrier in between them the waves would collide and then cease. But instead they did collide but then continued on until they reached the other side of the container/ reached the other marker.

recordings of Riena's and my experiments: