Wednesday, September 13, 2017

Lab : Crystallization of Milk


Crystallization of Milk

Question

1)  why do we add salt to the ice?
  • Because we had to make a milk solid.
2)  why do we add the cookies and other things, only after the milk has frozen slightly.
  • it takes longer to freeze since the ingredient absorbs the heat.
3)  what are two factors that affect the freezing you think?
  • I think it is ice and salt movement.
4)  why do you need a bit of air in the bag?
  • it helps the milk moves around to make contact with the ice.


How to do it?
1) Put some of the milk into the zip lock bag.

2) Insert it into the container.

3) Burrier the bag in the in the ice.

4) Put the salt over it.

5) Put number 6 in and move it back and forth rapidly

6) Repeat for around 5 minute

7) Enjoy ice cream !!
















Wednesday, May 24, 2017

Writing Assignment

Writing Assignment

    Image result for nuclear power
  • Acid rain
        Acid rain is a type of acid deposition, which can appear in many forms. Wet deposition is rain, sleet, snow, or fog that has become more acidic than normal. Dry deposition is another form of acid deposition, and this is when gases and dust particles become acidic. It is caused by pollution and carbon dioxide in the air. It causes harm to buildings, soil, human beings, and nature.




  • Nuclear Power
          Nuclear power is the use of nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. The term includes nuclear fission, nuclear decay, and nuclear fusion.
 In 2007, 14% of the world's electricity came from nuclear power.


Image result for nuclear power
Image result for nuclear powerImage result for nuclear power








Wednesday, February 1, 2017

3 types of cloud



1. Cumulus cloud




2. Circus cloud




3. Stratus cloud

Sunday, January 22, 2017

Ball Bearing lab

The Effect of Gravity on Speed

Introduction
Gravity provides a constant acceleration (force) on an object. The effect is changed by using ramps at different angles. In this lab, you will find the optimal angle to maximize acceleration on a ball bearing so it travels the farthest and/or the fastest. Friction is the opposing force created by the surface interactions. Whenever something rolls due to a force, friction will oppose this force and slow it down.

Equipment needed:
Timer Ramp Ball Bearing
Graph Paper (2) Ruler

Procedure:
1. Put the ramp against the seat of a chair. Place the ramp and chair so that the ramp points towards the hallway. Have your teammate on the other end of the hallway.
2. Place the ball bearing at the top of the ramp.
3. Lift the ramp 20 cm and release the ball bearing
4. Time how long it takes to travel 5 meters.
5. See how far it will go..
6. Repeat the experiment three times for each height then do 40 cm, 60 cm, and 80 cm.

Height
Time to travel 5 meters
Distance travelled
20


20


20


40


40


40


60


60


60


80


80


80



Observations:

The ball released from higher ramp travel faster and further. The ball release at height 80 cm went faster than and further than 20 cm.




1. Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other               factors ?

Answer : The ball roll off at higher position went faster and longer distance than lower height. The result of the height of the ramp cause more acceleration of the ball



2. Discuss what is the fastest speed reached and any factors that could improve this ?

Answer : The ball with fastest speed was the one at highest angle. To improve speed, we need to change the angle higher.




3. Does the ball travel in a straight line, why or why not ?

Answer : Yes, because of the surface was smooth and does not cause friction between ball and ramp