Buoyancy!

Today in class we started working on a new experiment! We are going to test out Buoyancy in a virtual lab like we did with viscosity. We also learned about Archimedes Principle. Archimedes was the man who discovered buoyancy. Archimedes Principle explains why a object will float or sink. If the object displaces an amount of water that weighs as much or more than the object, the object will float.
Today we just started on the experiment to test buoyancy. We aren't experts yet but soon we will be! If any of you would like to test buoyancy, here's the URL.

 http://www.glencoe.com/sites/common_assets/science/virtual_labs/CT01/CT01.html

Viscosity

Today we went to the computer lab to use the virtual lab in the previous post. We were measuring the viscosity of different fluids, water,honey, olive oil, ethanol, and corn syrup. Then we changed the temperature we used: Low 14 Celsius, medium 55 Celsius, and the high 70 Celsius. Then we dropped a steel ball to test the viscosity. Below are the results.

Water: 14 Celsius low viscosity, 55 Celsius high viscosity, 70 Celsius high viscosity
Honey:14 Celsius low viscosity, 55 Celsius low viscosity, 70 Celsius high viscosity
Olive Oil: 14 Celsius low viscosity, 55 Celsius low viscosity, 70 Celsius high viscosity
Ethanol: 14 Celsius high viscosity, 55 Celsius high viscosity, 70 Celsius high viscosity
Corn Syrup:14 Celsius low viscosity, 55 Celsius high viscosity, 70 Celsius high viscosity

As a class we asked a question and it was does the temperature affect the viscosity. By the results we got we found out that yes the temperature does affect the viscosity. My hypothesis was yes the temperature does affect the temperature, and my partner (Emma) got the same hypothesis.

Down, Down Went the Steel Ball!

Today in Science class we went on a virtual lab to test if the temperature of the fluid affects the viscosity. For each different fluid we changed the temperature around from 14 degrees to 55 degrees to 70 degrees to see if there would be a difference. Then we dropped a steel little ball into the jars of different fluids. If the ball went really slow it had a low viscosity, but if the ball went straight throught the fluid it had a high viscosity. Since the honey is a thicker fluid I thought that the steel ball would travel throught the honey easier when the honey was heated up. I thought that the ball would travel through the honey easier when it was heated up and it did!


If you want to see the virtual lab check out the link below.
http://www.planetseed.com/flash/science/lab/liquids/visco_exp/en/viscosity.htm?width=620&height=500&popup=true%20

Defintions from bill nye

On friday we watched a bill nye video and we had to fill out a work sheet. We had to think of some words in the video that we didn't know. The three words I had were Convection, Aerodynamic Drag and Vaper.

Convection: The transfer of heat circulation or movement by heated parts of liquid or gas.

Aerodynamic Drag: The drag of a fluid that acts on any moving soild.

Vaper: A liquid or a soild that diffuses in the air.
 

What are Fluids????????

What is a fluid?
-any substance that flows
-can be a liquid or a gas




Buoyancy: is the ability for some-thing to float in a fluid.
EG.)
-doing a hand-stand is easy to do in water because of the buoyant force.
-buoy's (in water) are called buoy's because they are buoyant.
-in a hot air balloon, the air is buoyant so it floats.
-life jacket's help lower the density of the person wearing it to help them float.


Viscosity: the measure of how fast a fluid flows, or how thick or thin it is.
EG.)
-Water vs. honey. Water has a high viscosity, honey has a low viscosity.
-Tar vs. milk. Milk has a high viscosity, honey has a low viscosity.
-Molasses vs. coffee. Coffee has a high viscosity, molasses has a low viscosity. 




Density: The amount for mass (weight) in a substance. Particles are being crowded.
EG.)
- If 11 people (particles) we all in an elevator, the more mass, compared to two people (particles) in an elevator.


Pressure: is a force acting on a fluid.
EG.)
- When you take the cork out of a wine bottle, the wine comes out.

I took this picture with Mrs. Thompson's I-phone. Took in 2014.

FANTASTIC FLUID

WHAT IS A FLUID!  
Any substance that flow
Can be a liduid or a gas                                                        QUESTION for you
      
                                                                         -why does pop become more fizzy when you shake it!


PRESSURE IN FLUIDS!

Looking at a firefighter; with out the pressure force the water would not reach  the fire.
nor  could the air in the firfighters' tanks would reach the lungs
to protect them from choking.






DENSITY!

deffinition: Density is the amout of mass in a substance.
it could also be described as {croweded ness}

Example: If you had  two objects the exact same size, the heaver one would be discribed as the denser object.



BUOYANCY
-The  ability for someting to float in a fluid

Example:doing a hand stand in the water is easy  becuase of the buoyancy force

FLUIDS!!

Today we started a new unit! We started doing FLUIDS!!!

we used padlet! some questions that were asked were:

a) -what are three fluids that pour very slowly?

b) -what are three fluids that floe quickly?

c) -what is youre favorite fluid?

 

 

Some answers given were:

a) -Syrup, ketchup, and molases

b) -water, apple juice, and milk

c) -orange juice

 

We also wrote what we think a fluid. We wrote in our groups that:

              -a liquid mass that shapes to its surroundings and distributing equally

              -something made of more than one element

              -a state of matter which takes shape of its container (to an extent)

             -a fluid could be a gas but can’t be a solid

     We conducted an experiment!!!

          Step1- get 1/4 of a cup of mysterious white powder and put it in the bowl

          Step2- add 1/8 of a cup of water

          Step 3- stir the ingredients until all powder is absorbed (you should be abled to hit the mixture with a spoon and it will feel hard or bouncy)

 

 

WE DID ANOTHER EEXPERIMENT!

         step1- light a candle

         step 2- put about 2 tbs. of  bakind soda in a cup

         step 3- pour a bit of vinigar in the cup

         step 4- pour the gasof the mixture on the candle without putting any liquid on it

(the candle should go out!!)

MATHLETE FRIDAY!!!!!!!!

TEASER ONE: If it were two hours later, it would be half as long until midnight as it would be if it were an hour later.
What time is it now?

TEASER TWO:At the local Sunday School meeting, the teacher brought in some puppies. There were 20 more children than puppies. In the corner of the room, within the ant's nest, there were exactly 10 times as many ants as children. In total, including the teacher, the children, the puppies and the ants, there were 1440 legs in the room. How many children attended



TEASER THREE:

A number of children are standing in a circle. They are evenly spaced and the 7th child is directly opposite the 18th child. How many children are there altogether?

Review

Today we are doing a review


Matching
-parts of cells
[plant,animal]
-virus/pathogen/bacteria

Multiple choice
-medicine wheel
-osmosis/diffusion/permeability

Short Answers

















- six characteristics of life

- Immune system

Long Answer 
- Parts of the heart/blood path


Also this is our first post of 2014