Wednesday, 20 September 2017

Skill Practice Key Concept

Calculate the density of each of your mineral samples. How could you use the densities to identify the minerals?

Key Concept Would density or colour be more useful in identifying a particular mineral? Explain your answer.

Milk Crystallization

include--pics and procedure


1)  Why do we add salt to the ice?
Answer. Because Adding salt to water extracts heat from the surroundings. So you make ice-cream or ice by surrounding its container with water to which salt is added.
2)   Why do we add the cookies and other things, only after the milk has frozen slightly
Ans. Because the topping will not freeze and it will mix with milk easily.

3)  What are two factors that affect the freezing you think?
Ans. 1.The freezing point of that substance.  2. Movement of matter.
4)  Why do you need a bit of air in the bag?
Ans. To make ice-cream soft

Tuesday, 6 June 2017

volume, density and mass

Volume, Density, and Mass

Today we have done the lap work of volume density and mass and the thing that we did is we have stone with the sample numbers and we weight the stone after that we put it into the water that is 150 ml so the height of water in the beaker will higher than old we will measure how much it get more because of stone so we will know what is the stone volume in ml and then we find the stone density by use weight divided by volume and then make the table below this is the final step to finish the work.

Sample No.     Weight grams     Volume ml     Density (g/ml)
    1                      125.9                 46                  2.737
    2                      135.9                 57                  2.384
    3                       46                     50                  0.92
    5                      114.7                 50                  2.294
    6                      110.6                 50                  2.21
    7                      243.8                 68.5               3.559
    9                      200.4                 71                  2.8225
    11                     98.5                  50                  1.97
    12                    146.94               50                  2.938

Stone sample no.1

Stone sample no.2

Stone sample no.3

Stone sample no.5

Stone sample no.7

Stone sample no.9

Stone sample no.11

Stone sample no.12

Wednesday, 24 May 2017

Writting assignment

The impact of society on the environment.

Some people cut down trees and that make trees have less than before, so the world becomes hotter. Some of the factories create pollution that is very dangerous to people, for an example - is acid rain. Then in some country, they have many factories so they must use a lot more energy, so they developed themselves to have a factory that can create more energy - example, Japan, they make the nuclear factory and make nuclear power to make more energy for use. Nuclear power does not make a pollution to the air but another energy make so when people use the just Nuclear energy they won't make air pollution and this will make people that sick because of the air pollution decrease so people will more healthy and happier than before.