วันพุธที่ 20 กันยายน พ.ศ. 2560

Crystallisation Lab


Crystallisation Lab






1)  Why do we add salt to the ice?
- the salt make ice get lower freezing point.
2)  Why do we add the cookies and other things, only after the milk has frozen slightly.
-If we add the cookies and other toppings, it would likely to slow down the freezing of the ice.
3)  What are two factors that affect the freezing you think?
-if we shaking the ice the milk will be freezing faster
-Salt and sugar can affect the factor of freezing
4)  Why do you need a bit of air in the bag?
-Because the space make the milk freezing easier.

วันพุธที่ 14 มิถุนายน พ.ศ. 2560

Rock lab Primrose

Rock Lab
Calculate the density of each of your mineral samples. How could you use the densities to identify the minerals?
We will know it's shape and size of the mineral, also the weight of grams/kilograms. We also can identify the liquid volume too.
 Key Concept Would density or color be more useful in identifying a particular mineral? Explain your answer.
-The density is easier than color to identify the minerals. Because color can be same but different types of minerals.

         Number        Weight(G)          Volume(ml)         Density(g/m)
1           7                    100                      245                  0.40816         
2           6                    50                        110.9               0.45085
3           5                    50                        110.7               0.45167
4           Pumice          45                        20.92               2.15105
5           3                    45                        47                    0.95744
6           X                    50                        120.4               0.41528
7           2                    50                        137.5                0.36363













วันพฤหัสบดีที่ 25 พฤษภาคม พ.ศ. 2560

The effect of environment

The environment that affects other social issues
1. Throw the garbage in the water/land
Sometimes, people are lazy and don't want to get up and find a trash can. They think that if they throw their cigarette out the car window, spit their gum on the sidewalk or throw the napkin outside the window, They think nothing will happen,
After all, how can this one piece of trash cause any harm to our environment? Then it's will be the water/land pollution
So please don't throw a trash on the road or etc. and it will get less pollution.
2. Pollution of the factory
There are several benefits in having a factory. Many things people take for granted wouldn't be possible without factories. However, factories also have drawbacks. They can be built close to large cities or small towns. Wherever a factory is developed, it will have both advantages and disadvantages.
3.Pollution of the cars and transportation
Cars and trucks and vehicle produce air pollution throughout their life, including pollution emitted during vehicle operation, refuelling, manufacturing, and disposal. Additional emissions are associated with the refining and distribution of vehicle fuel.



วันจันทร์ที่ 30 มกราคม พ.ศ. 2560

Primrose Cloud

Cloud
Cumulus 
Cumulus cloud look like as puffy, cotton and fluffy, and have flat bases.
              Cumulus cloud being low-level cloud are generally less than 2000m (3300ft.) in altitude unless
they are more vertical cumulus congestus form
Stratus
Stratus cloud look like huge Gray blanket 
              Stratus cloud mean rain if it is warm or snow if it cold. Sometimes stratus cloud are on ground or very near the ground, We called fog.

Cirrus
Cirrus cloud look like frezzing of super cooled water droplet.
                Cirrus cloud are thin and wispy, and common in high level cloud, This cloud found in higher than 20,000 feet (3000 meter).


My Group

วันพุธที่ 11 มกราคม พ.ศ. 2560

Primrose- Effect of Gravity on Speed

               The Effect of Gravity on speed



Height
Time to travel 5 meters
Distance travelled
20
                   4.38
                     -
20
                   4.41
                     -
20
                   4.34
                     -
40
                   5.87
                     -
40
                   4.27
                     -
40
                   5.03
                     -
60
                   5.25
                     -
60
                   5.49
                     -
60
                   5.61
                     -
80
                   7.19
                     -
80
                   7.21
                     -
80
                   7.18
                     -

Observation: 20 height go slow
                     40 height go faster than 20 height
                     60 height go faster than 20 and 40
                     80 height go fastest

1.Describe how the ball rolls off the ramp at each height- discuss the effect of bouncing or other factor.
Ans- 20 height the ball go straight line
        40 height the ball go same with 20
        60 height the ball go awry 
        80 height the ball go bounce
2.Discuss what is the fastest speed reached and any factors that could improve this.
Ans- Yes
3.Does the ball travel in the straight line, why or why not.
Ans- Yes because the ball will find the optimal  angle to maximize acceleration, so it travels the farthest and/or the fastest.