Wednesday, September 13, 2017

Crystallization of Milk Lab

Materials

  • milk
  • bag
  • test tube rack
  • bucket
  • salt

Procedure

First step: We pour the milk into the bag and close it. 
Second step:  We put ice then add salt to cover the bag.
Third step: We use test tube rack to cause movement to the ice which will make the milk freeze. 
Fourth step: After the milk starting to freeze, we add toppings to the milk and did the same as step 3 until the milk completely freeze.
Fifth step: We washes our hand and make sure the salt doesn't come into the bag while we are opening.
Sixth step: Enjoy the ice cream

Results

This lab shows us that liquid milk turns into solid by making it cools down. The salt makes the process faster by making the temperature low, so it takes less time than using only ice.

Questions

1)  why do we add salt to the ice?
It makes the bonds of water change and decreases the freezing point. Therefore, the ice doesn't melt and can cause the milk to freeze.

2)   why do we add the cookies and other things, only after the milk has frozen slightly
Because toppings are a heat capacity which can slow the process down.

3)  what are two factors that affect the freezing you think?
Movement and temperature

4)  why do you need a bit of air in the bag?
A bit of air in the bag allow milk to move and contact with ice.

Wednesday, June 7, 2017

Rock lab

Results

Calculate the density of each of your mineral samples. How could you use the densities to identify the minerals?
- When the density of minerals is the same they are the same type of mineral.
Would density or color be more useful in identifying a particular mineral? Explain your answer.
- Density and color are both useful. Because both of them can use to identify differents types of minerals.





Wednesday, May 24, 2017

The Impact of Society on Environment

The Impact of Society on Environment

The effects of society on the environment that are happening today are such as oil spills and acid rain. Acid rain is rain that becomes polluted by smoke from factories. The factories release poisonous smoke which contains harmful substances into the atmosphere which makes air polluted and when water cycle happens the water which evaporates into the air also become polluted. When the water falls down to earth as rain, it becomes acid rain. The acid rain did not just fall down on earth. It is poisonous and harmful. It will destroy some monuments or buildings and if it rains into a river or lake it can make animals or people living there died by using or drinking the water died.


Wednesday, January 18, 2017

Clouds lab


cumulus
- white and fluffy


cirrus
-thin and featherlike



Group picture

Essay:

In this year at Panyarat High school. I have learned lots of things. Learning here is fun and interesting. What I like the most is doing experiments in the lab. Because I can learn to do many things more than my last school. My favorite lab experiment is the fish and shrimp lab. This year I got to join the science quiz bowl during the academic week. We got to learn many things that we don't know about science. I also like watching debate. Because I think debating is fun and we get to learn speaking English from it. I hope I can join debate club next year.





speed lab

1.         Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other factors.
           
 If the ramp is high, the ball will bounce on the floor and time travel will be longer than the ramp with lower height.




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

 3 seconds, lower ramp




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

No. Because the floor is tilted.