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Thursday 24 October 2019

Thursday October 24, 2019

Tremendous Thursday!!

We began the day with music.

During math, we reviewed how to draw 2-D views of 3-D figures as well as drawing 3-D figures using isometric dot paper.

Then we reviewed our experiments from yesterday.

hot air expands when heated:

https://www.youtube.com/watch?v=9ySn2VUnrqo


We did an experiment with a balloon on a plastic bottle that was placed in hot water and then cool water. We saw that when the balloon was placed in hot water the balloon inflated!!!! We found out that is because: hot air rises, the molecules move quicker, they are more spread out and it is lighter. Then we put the bottle in cold water and we saw that the balloon deflated!! We were able to deduce that this is because cold air sinks, becomes 
denser and heavier. 
So we can apply this knowledge to hot air balloons:


hot air rises:

An aluminum coil was hung from our ceiling that was standing still. Once Ms. Jaskolka put some candles underneath the aluminum coil, it began to spin!!!!! We were able to conclude that hot air rises and as a result, the candle heats the air under the aluminum coil. The aluminum coil begins to turn as a result of the warm air rising and following the pattern of the coil! Very cool!!

Air takes up space:
We put a candle in water and then flipped a cup over the candle. We saw that the water started to rise up in the cup!!! Again, from this experiment we can see that air takes up space so the water was not able to go into the cup but the fire from the candle uses up all the oxygen in the cup and therefore there was more room for the water to enter the cup and rise up. A lit candle needs to draw oxygen from the air in order to continue burning. If you limit the amount of air available, the candle's flame eventually goes out once it uses up all the oxygen. So, when the oxygen is all used up, there is now room for the water to enter into the cup. 

After first recess and lunch we had French.

Then we continued doing more fun experiments related to the properties of air. 



Air takes up space

We used two cups, one that went straight down and another cup that filled up with water. After, we were able to transfer the water from one glass to the other AND we were able to transfer air from one glass to the other!!! Air was able to flow/pour from one cup to the other!!! From this experiment we were able to see how air takes up space so that the water was not able to go where there were air bubbles. 





Air takes up space:


Procedure:
1.Push the deflated balloon into the bottle and stretch the open end of the balloon back over the bottle’s mouth.
2.Without removing the balloon from the bottle, try and blow it up.

We could not inflate the balloon no matter how much we tried because the air was taking up the space in the bottle so there was no room for the balloon to inflate. 







Air resists things moving through it
We did another experiment with crumpled paper and intact paper. We dropped both of them and saw that due to the larger surface area of intact paper, it took longer to fall then the crumpled-up paper. So we were able to conclude that the crumpled paper has less area for air to resist and falls to the ground before the intact paper.











Air pressure:

can support solid objects in sustained flight. We used a hair dryer and a ping pong ball to see the effect. Balancing air pressure and gravity, we can make a ping-pong ball float in mid-air.The ping-pong ball will fly up with the air from the hair dryer until it reaches a point of balance – this is where the force of gravity (which pushes the ping-pong ball down) is equal to the force of the air (which is pushing the ping-pong ball up).

https://www.physicscentral.com/experiment/physicsathome/ping-pong-physics.cfm

This experiment will help us understand why planes fly when we start learning about flight! 












Air can be compressed:

We explored what happens to compressed air using a balloon as a rocket. We blew air into a balloon and then taped it to a rope and then released the balloon. What we saw was that the compressed air in the balloon came shooting out. Since the air is compressed it wants to escape and was given this opportunity when we let go of the balloon. 





Air expands when heated.

There was a dent in a ping pong ball and then it was placed in hot water. As the air heated in the ping pong ball, the air expanded, and the dent popped out and the ping pong ball was back to normal. 

We also did an experiment with a plastic with a similar effect. When hot air from a hair dryer was blown on a closed plastic bag, it began to grow as the air inside of it expanded. 


Low pressure and high pressure
We also had a conversation about air pressure and how we feel more air pressure at sea level versus up in the mountains. This is because gravity pushes the air down and when you are at sea level there is more air that is being pushed down but when you are up in the mountains there is less air and therefore lower air pressure and as a result less oxygen to breathe. 


We had so much fun learning about air today!!!

Homework:

1. Read Daily
2. math sheets
3. mind map






4. Read the new information given on the properties of air and complete the activities (fill in the blanks and circle the correct answer
5. Ensure all novel study sheets are complete including the graphic organizer (we will work on our summative project for the novel study next week - students will be writing a book report) 
6. Air test on Tuesday 



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