Wednesday, 13 September 2017

Crystallisation Lab

-- Crystallisation Lab --

1)  Why do we add salt to the ice?
- Adding salt lowers the freezing temperature of water and wintry ingredients. Therefore, as ice melts - it lowers the temperature and make the ingredients freeze.

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?
- When we shake the ice and scrape the ice bag to make the ingredients freeze.
- Furthermore salt and sugar may affect the factors of freezing.

4)  Why do you need a bit of air in the bag?
- We need to make the ice freeze fast, therefore we need a bit of air to make it easier to freeze.

Wednesday, 7 June 2017

-- Skillz Practice --

Skill Practice Key Concepts

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.

= I think both color and density has both advantages, they can be useful to be identified and to find the important parts of the mineral.

Wednesday, 31 May 2017

Volume, Density and Mass

😎 Volume, Density and Mass 😎
Kru Gary's Class

So, today we have done experiments of volume, density and mass, so what we did was we have sample numbers and weigh it on the measuring stand. We measured and got the results. Add a 150ml of water in a beaker - and drop the rocks into it. If the water gets higher than 200ml we will use a graduated measuring tube to measure it up and add it to the total number of 200ml. After that, we calculated the density of the volume and mass. By doing that, we divide mass by volume. That's the final result.

Sample No.    Weight of Grams    Volume ML    Density g / ML
       12                    149.94g              201 ml                0.74g
        1                     125.5g                202 ml                0.62g
        2                     136.3g                203 ml                0.14g
        4                         ---                        ---                     ---
        5                      45.4g                 174 ml                 0.26g
        6                      111.5g                201 ml                0.55g
        7                      246g                   201 ml                0.984g
        8                          ---                        ---                     ---
        9                      199.8g                221 ml                0.9 g
       10                         ---                        ---                     ---
       11                       98.4g                 200 ml               0.492g

Wednesday, 24 May 2017

The Impact of society on environment

😈The impact of society on environment😈

I see that the environment here is very polluted, you may ask, why? The obvious answer is that people are using gasoline to power their cars which make acid rain - which is going on to another topic. As we use cars which are in use of this - carbon monoxide is being polluted into the sky - then, acid rain is being created and the impact of acid rain are; Damages buildings, polluted rivers and corrupted trees. This will certainly remain in the water cycle for decades, centuries or even millenniums! 

Acid rain will make contaminated rivers and will harm our food chain. We know that water is liquids, not gases, not solids. Water flows just like liquids, I see that as more of these happen - it will contaminate the rivers and the ocean. Think of us - we can filter these kinds of water, but no animals have the mind to think what acid rain usually is (which means they can't filter the water). What happens then? They become endangered, they die and harm our food chain. Then? We all (may die or may not die) we wouldn't grow because there aren't any proteins in our daily lives. End of the story.

Image result for Nuclear powerWe all know what nuclear power is: it is the use of nuclear reactions that releases nuclear energy to generate heat. We see that heat may create global warming and the greenhouse effect. What global warming impact our daily lives (or animals' daily lives?) The thing here to talk about is that polar bears, penguins, and the Arctic animals will suffer because of icebergs melting. BUT there is a theory that the cold parts of the land - ice wouldn't melt - it would be hard to melt and would stick together. Therefore - ice wouldn't be too easy to melt in the arctic parts. But as for humans - about 37 degrees Celsius is about our "heat limit" so if there were to be a heatwave includes of global warming - we wouldn't be able to stand the heat of it.

Moving on to the next topic: Oil Spills, what are they actually? They are the release of a liquid petroleum hydrocarbon into the environment, especially marine areas. It pollutes our marine life; fish, octopi, all of the others too. This is polluted life, it harms the marine life: it's already enough for our world, therefore let's help to keep our world as clean as possible so we don't have painfulness in our lives.

Image result for icebergs

Wednesday, 18 January 2017

Types of Clouds

☁ Types of clouds ☁

Cumulus clouds

Cumulus clouds are white puffy and fluffy clouds which usually means good weather. They look like pieces of floating cotton. Unlike Cirrus and Stratus which doesn't mean change in weather is coming or rainfall. They are 1000 meters high in the sky. 

Cirrus clouds

Cirrus clouds are thin, flat and featherlike clouds of ice crystals in the atmosphere which usually means a change in weather is coming. Unlike any other clouds, they are thin and flat, not fluffy like cumulus clouds. In addition, they are very wispy and they are 6000 meters high.

Image result for cirrus clouds

Stratus Clouds
Cirrus clouds are sheets of low, grey clouds that bring light snow, hail or rain. They look like a huge gray blanket that hands low in the sky. Sometimes stratus clouds are on the ground or very near the ground, and then we call them fog.

My Group Members

My Highlights this year 

This year my highlights are that Physics about speed, time and velocity. These I am looking forward to getting better at it. Next year I am looking forward to many things, but I have no idea what it is now.

Thursday, 5 January 2017

The effect of gravity on speed

Add Science Analysis
1. Put the ramp against the seat of a chair. Place the ramp and chair so that the ramp points towards the hallway. Have your teammate on the other end of the hallway.
2. Place the ball bearing at the top of the ramp.
3. Lift the ramp 20 cm and release the ball bearing.
4. Time how long it takes to travel in 5 meters.
5. See how far it will go.
6. Repeat the experiment three times for each height then do 40 cm, 60 cm and 80 cm.

Analysis (questions):
1. Describe how the balls roll off the ramp at each height - discuss the effect of bouncing other factors.

= The ball bearing rolled diagonally off the ramp and went very far (20 cm). The ball bearing rolled, also diagonally and not the furthest (40 cm). The ball bearing rolled, 3 times, almost vertically (60 cm).

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

= The fastest speed reached 4.50 seconds and the way we can improve this, is having a smoother ramp which will make the ball roll faster in a rate, because there is less friction. But if we have a rough ramp the ball bearing will have more friction and will roll slower than the smoother ramp.

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

= The ball doesn't travel in a straight line which there are 2 factors, the first reason is that we placed it in where the ball rolls diagonally, the second reason is that there is wind which pushes the ball to the right or left.