Thursday, 16 November 2017

color lab

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

- 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.

Wednesday, 13 September 2017

Milk crystallization_Sai

1)  Why do we add salt to the ice?
ans. because we have to decrease the temperature to make the ice-cream, and salt can decrease the temperature of the ice.

2)  Why do we add the cookies and other things, only after the milk has frozen slightly
ans. It takes longer to make it frozen because there are many ingredient that absorb thermal energy.

3)  What are two factors that affect the freezing you think?
ans. Movement and low temperature

4)  Why do you need a bit of air in the bag?
ans. because it help the milk to move around and make contact with the ice.

How to make milk crystallisation

1) Pour the milk into the bug.

2) Put the bug into the container which is full of ice.

3) Put the salt in the ice.

4) Push the test tube rack up and down and hole the top of the bag until it becomes more solid.

5) Enjoy you ice - cream!!

Thursday, 1 June 2017


mr. gary said it's okay

A density


7. Calculate the density of each of your mineral sample. How could you use the densities to identify the minerals?
Ans: Yes because if density is the same, it will be the same type of mineral.

key concept would density or color be more useful in identifying a particular mineral? Explain your answer.
Ans: -Color is useful because a color is easily observed, but not always a reliable characteristic for the identification of minerals. 
         -Density is useful because Each mineral has a characteristic density (density does not vary with the size of the mineral).