Grade 9
Astronomical Units Model Las Vegas, Nevada: Stratosphere Casino and MGM Grand
https://mapsengine.google.com/map/edit?hl=en&hl=en&authuser=0&authuser=0&mid=zD_l7qZxbeBc.kR2OtvnR4IJg
My Day With the Drug Loo (Take Your Kid to Work Day)
So yeah, Take Your Kid to Work Day was yesterday. I went to my mom’s work on Wednesday. My mom works with the CBSA office down town in the intelligence division. I think.
Anyway, she thought that her little office building was boring, so instead, she sent me to the airport. And what’s at the airport? CBSA, or Canadian Border Services Agency. Basically, a bunch of officers showed us around the airport. We saw how the xray machines worked, and we saw two detector dogs. One of them, a small beagle was trained to find marijuana, and another one, a Labrador, was trained to find money of at least 5000 in someone’s luggage, or more precisely, ink. We were also shown how a “secondary inspection” would go down. Basically, when someone flies into the airport, the first people to greet them is the PIL, the primary inspection line. This line of people would basically question passengers entering Canada about their trip. What did the passenger do there, how long were they there, things like that. This is so they know that they are legitimate people who really were on a vacation, and they aren’t trying to smuggle something into Canada or whatnot. Only takes less than a minute, and if they seem legit, they’re sent on their way. If they seem nervous, they would go to secondary inspection where they would get a closer look at the passenger.
The CC (Chemical Change) in a Bag
I am waiting for my partners to send me photos and videos of the lab.
SCIENCE 9: Bag of Change
PREFACE:
In this activity, you will mix 3 unknown substances together in a bag and observe the changes that occur noting chemical change and physical change. Observation skills are crucial for this investigation. Watch for changes in state (solid, liquid, gas), colour (use noun-colour description), volume (mL), temperature, and anything else you can detect. Do not smell any of this substances please.
MATERIALS: PLEASE NOTE WHMIS LABELS AND ACCORDINGLY SAFETY
| · Chemical A (a white solid)
· Chemical B (a white solid) |
· Chemical C (a blue liquid)
· 50 mL graduated cylinders |
· Plastic bag
· goggles
|
PROCEDURES: GOGGLES ARE DONNED & NOT REMOVED UNTIL LAB CONCLUSION!!!!
- Add one spoonful of Chemical A on the left side of the ziplock bag. Describe and record the properties for Chemical A. Add 1 spoonful of Chemical B on the right side of the ziplock bag. Do not mix the chemicals. Look and describe Chemical C. Record your observations in the spaces provided below. Observations may include the colour or state of each chemical. Add a photograph of each Chemical in second row below.
| Chemical A (Sodium bicarbonate) | Chemical B (Calcium chloride) | Chemical C (Bromothymol blue) |
| Looks like a white powder. They are not transparent. The bag weighed 11.15 grams
|
The chemical looks a lot like white rock candies. They are solid and are not transparent. The bag with the two chemicals weighed 11.5 grams. | It is a blue liquid. It is stored inside a glass bottle, that seems to have been stained blue on the inside by the liquid. The mixture of chemicals inside the bag weighed about 11.58 |
- Mix Chemical A with Chemical B in the ziplock bag. Record observations. Add 10 mL of chemical C into a plastic bag. QUICKLY remove as much air as possible and then seal it up.
- In the first 30 seconds, squeeze the bag in various places to mix the chemicals.
- Detect any temperature changes with your hand.
- Record as many observations as you can. After 2 minutes record any new observations.
- Add at least two photographs of your ziplock bag.
| Observations:
Chemical A has seemed to simply coat chemical B in the white powder. Once I added chemical C, it looked like a virus infecting an organ system. Chemical C made contact with Chemical A and B, then the white powder slowly turned yellow. The temperature changed and seemed somewhat warm in my hands as the reaction was taking place.
|
| PHOTGRAPHS |
- When you are finished, wash all the chemicals down the drain and rinse out the plastic bag.
- What evidence of chemical change did you observe in the bag? What physical changes did you see?
I didn’t see any type of physical change, but the powder did turn yellow when it made contact with the blue chemical.
POST THIS LAB ON YOUR EDUBLOG
BE SURE TO INCLUDE YOUR VIDEO!!
The Laundry Detergent Lab (I’ll post pictures and videos later tonight)
Cleaning Detergent Lab
Aim
To find out which laundry detergent has the best cleaning power.
Hypothesis
Which laundry detergent has the best cleaning power?
Prediction
Tide will have the best cleaning power (Stan believes that Woolite is for more delicate clothing like silk. Our rags are certainly not silk).
Materials
Five pieces of approx. 5x5cm rags stained with dirt, five beakers, five glass rods, tape (To label beakers), red sharpie, thumbtacks, 4 kinds of detergent, water, stopwatch.
Procedure
First, cut out 5x5cm pieces out of a dirty rag. Fill five beakers with 250mL of water, then add 5 drops of different detergent to each one. After that, label each beaker according to the detergent in it. Next, put one rag into each beaker and stir each one for 70 seconds. Let them sit in the water for 10 minutes. Finally, take the rags out of their beakers and pin them up to dry over the weekend.
Observations
- Water(1): When the rag entered the water and was stirred, the water seemed to become dirtier. Pieces of fabric and dirt are falling off of the rag.
- Ultra(2): The water looks very clean and transparent. No dirt is falling off of the rag. Only pieces of fabric. The water seems to be turning to a tint of red. We assume it is because of the Sharpie.
- Sunlight(3): The water is much more dirty than the rest of the test subjects. Like swamp water, it is not see-through. Many dirt particles are falling off, but there are very little pieces of fabric.
- Tide(4): The water is reddish-brown, which we think is the result of both the dirt and Sharpie washing off.
- Woolite(5): The water is dirty, but not as dirty as Sunlight and Tide. The rags are pinned up and drying, and currently the rag that was washed with just water seems the cleanest.
Photos and Videos
Conclusion
The rags are now dry. Comparing the before and after pictures, we observe that sample three (Sunlight) and sample five (Woolite) are the cleanest. I believe that Woolite did the best job.
Interesting Questions
- Would another detergent work better on a different stain, like coffee or berries?
- Would the results differ if we had stirred each sample in the glass longer? Shorter?
- Did the material of the sample affect the results significantly? Would the results be different if we used something cotton, and not a towel?
Playing with “Ooblek” (Or, “The Riddle of the Solid Liquid”)
“Ooblek”. My science teacher, Mr. Horton said. “Real messy stuff. Don’t get it on your clothes, that’s all I ask. I want you guys to experiment with the Ooblek, and answer one question,” I was sure I could answer any question that Mr. Horton threw at me, and if not, I’ll simply do a quick google search.
“Is the Ooblek a liquid, or a solid?”
A liquid that can become a solid. I was skeptical at first. I’ve heard of stories of a liquid that could suddenly change it’s physical state, although I’ve never actually seen such a thing. Other kids say they have, but I haven’t. They’re all baffled at me. Our teacher, Mr. Horton, put all of us into groups of four. With me was Juliana, my partner for my last lab, TJ, and Patrick. Mr. Horton gave each group of four one bag of cornstarch. Patrick grabbed a graduated cylinder and poured exactly 45ml of water into the bag. Patrick violently shook the bag to mix the contents before setting it on the ground. Before we poured the substance onto the table, we poked it while it was inside the bag. I couldn’t say I was amazed at first. It certainly looked like a liquid. I poked at it, and sure enough, it reacted like a liquid, flowing away from my finger. TJ dived right in, and slammed the bag.
It didn’t move.
Kay, that’s a bit odd. We poured it out of the bag and onto the table. It had the appearance of pancake mix. I know the sight of pancake mix well, for my dad makes it for breakfast at least every other week. We were all looking at each other, wondering who would touch it first. I took one for the team, and poked at it. It was cold, and, gooey (I know “gooey” is a terrible word to describe something, but just go with it, please). I immediately tried to pull my finger away, but the “liquid” held my finger there for a second. So it was sticky too. Eventually, all of us started poking at it. I learned three things about it.
1. If you poke it slowly, it’s a liquid.
2. If you poke at it really quickly, it hardens up on you.
3. It’s insanely hard to get off of your clothes (One of my friends was such a victim, getting Ooblek on her black pants).
We all ended up getting our hands covered in it. I tried to make a ball from th Eventually I smelled it, and frankly, it smelled disgusting. I have a weak stomach so eventually I had to stop my fun with the Ooblek, cause my lunch was threatening to come up.
So I’ve written all of this, but now, I need to come to a conclusion. Is “Ooblek” a solid? Or a liquid? I believe that can be either a solid, or a liquid. “But Alex, that’s cheating! You need to pick one!” I can hear people say that now. Well, Ooblek is a mixture of a solid (Cornstarch) and a liquid (Water). In the beginning, when we mixed the two together, it was mainly a liquid. But if we hit it fast enough, it seemed solid. It’s simply a liquid with solid characteristics.
But later, when we were playing with it, I noticed something. TJ had a handful of Ooblek, and said that he wanted more water so he could keep moulding his Ooblek. That’s when I realized something. The Ooblek is made up of cornstarch and water, but you need the water to keep on using the Ooblek. Eventually, if you keep playing with the Ooblek, the water will disappear, then you’re only left with wet cornstarch. And what is cornstarch?
A SOLID.
So hopefully, this explains my reasoning on why I think that Ooblek is a solid and a liquid. I want to clarify that I’m not saying that Ooblek is both, I’m saying that Ooblek can switch between the two physical states.
Simple. As. That.
– Alex