## Wednesday, February 21, 2018

### Table for Pulley Lab

 weight in air apparent weight in water buoyant force (weight in air-apparent pulley weight in air length of string weight 1 0.15N 0.1N 0.05N 10N 40.5cm weight 2 0.2N 0.15N 0.05N 4N 44cm weight 3 0.25N 0.2N 0.05N 1.2N 24cm weight 4 0.5N 0.45N 0.05N 1.2N 31.5cm weight 5 1N 0.8N 0.2N 1N 32.5cm weight 6 2N 1.75N 0.25N 0.75N 37cm weight 7 2.15N 1.85N 0.3N 0.5N 44cm weight 8 5N 4N 1N 0.25N 37.5cm weight 9 10N 8N 2N 0.2N 28cm

## Electric Charge Lab

by

Ta, Punpun, Reina, Thames, Nut m202

### Materials

• balloon
• funnels
• large bowl
• water
• hair

1. Infer Why did you rub the balloon on your sweaterPredict what might have happened if you simply touched the balloon to your sweater instead of rubbing it.

#### Answer  When you rub a balloon against your sweater, the balloon will steal electrons from the sweater, which leaves the sweater positively charged and the balloon negatively charged. If you simply touched the balloon to your sweater instead of rubbing it, there aren't any charge transfer, so there aren't any friction.

2. Key Concept Why do you think the balloon interacted the way it did with your sweater and with the stream of water?

Answer  Because the charge is unequal; consequently,  it need to make contact to be balance itself (equivalent).

## Mapping Vector

Startpoint - M.201

East 6 steps
South 23 steps
East 14 steps
South 16 steps
West 37 steps
South 46 steps
West 15 steps
North 15 steps
West 18 steps
South 12 steps

Endpoint - Auditorium

## Wednesday, November 15, 2017

### Exploring Color Lab

Exploring Color Lab

Materials

1) flashlight

2) filters

- red, yellow, green, purple, and blue

Activity A:
1. look at the monitor
2r+gr+bb+g

When we use different filters, they also give a different color.

3. Work with another group -- put a color paddle over flashlight,
shine on white paper -- so a red green and blue It gives white color because they are primary colors, which when you mix them, it will produce new colors called additive color as more colors are added the color becomes lighter.

Activity b:
1. View white color through color paddle -- record result

2.  view colored objects through color paddles

3.  if you have time, do activity b—color by
subtraction--  It gives black color, which shows that combining the primary colors produces the black color.

## Wednesday, September 13, 2017

### Milk crystallization_Reina

Milk crystallization

1)  Why do we add salt to the ice?
Answer To make the ice cool more and become more solids because 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?
Answer It takes longer to freeze or make the milk freeze slower when the stuff is in it because it absorbs thermal energy.

3)  What are two factors that affect the freezing you think?

4)  Why do you need a bit of air in the bag?
Answer To help the milk move around to make contact or hit with the ice.

### How to do milk crystallization

You need to bring: ice
container
test tube rack
milk
salt
bag
topping

1) Pour milk into the bag.

2) Put it into the ice, which is in the container

3) Pour salt on the ice

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

5) Put the topping if you want and enjoy your ice cream!!!

## Thursday, June 1, 2017

### The Stony Lab

The Result of The Stony Lab

## ↘

The Stony Lab Question
7. How could you use the densities to identify the minerals?
Answer: Yes, because every minerals have their own masses, values, and  densities, which are different and specific.If they have the same densities ,they are the same type of minerals. So, Their densities are easily to identify them.

8.Which one is more useful is to identify the minerals, density or color?

Answer: Density is more useful to identify the minerals than color because sometimes the stones' color can be the similar and hard to identify.For example, Stone number 1 has the similar color as stone number 2. stone color can also vary in different conditions such as under the sea it maybe gain some moss over time or it can also be stained by mud etc.and the gemstones are not included because their colors are constant.