วันศุกร์ที่ 16 กุมภาพันธ์ พ.ศ. 2561

lab colour filter

Lab activity on light

Activity a
1. r+g, r+b, b+g
2. work with another group—put a color paddle over flashlight, shine on white paper—so a red, a green, and a blue
Activity b
3. view white paper through color paddles—record results
4. view colored objects through color paddles


Materials
- Flashlight
- Red filter
- Blue filter
- Green filter
- Yellow filter
- Purple filter

Colour by addition

so, in addition, it has 2 flashlights. R+G = White, R+B = White, B+G = White. It will form a white color on the paper sheet, unlike the subtraction one which will form a new color. First, choose two color cards and shine through it separately (don't put them together.)




Colour by subtraction

First, take two color cards and stick them together then get the flashlight and shine through it and take a look at the color. It forms a new color due to the two-color that's overlapping with each other.


By adding red and green together, the result is Cyan.


By adding blue and red together, the result is Magenta.


By adding blue and green, the result is Green.

วันพฤหัสบดีที่ 21 กันยายน พ.ศ. 2560


                               Crystallization of milk
         Question     
1)  Why do we add salt to the ice?
- the salt makes ice get the 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 space makes the milk freezing easier.

วันเสาร์ที่ 15 กรกฎาคม พ.ศ. 2560

lab



lab in blogger nine pictures_Boy_202



Sample number
Weight (grams)
Volume (ml)
Density (g/ml)
2.
213.1
78
2.732
5.
46
15
3.06
3 big.
46
55
0.8363
7.
244
98
2.490
1.
125
54
2.3148
14.
98
16
6.125
6.
111.1
94.5
1.176
12.
146.5
57
2.572
3 small.
26.5
50
0.53