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Thursday, September 14, 2017

Icecream-salt Questions







1)  why do we add salt to the ice?

To lower the melting temperature of the ice down.

2)   why do we add the cookies and other things, only after the milk has frozen slightly

Because if we put the cookies first it will stick in and make bad taste.

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

Ice and salt.

4)  why do you need a bit of air in the bag?

Easy to move around

Wednesday, June 7, 2017

stone lab




7. Calculate the density of each of your mineral samples. How could you use the densities to identify the minerals ?
Density is determined by measuring the mass of the substance devided by its volume.
8. Would density or color be more useful in identifying a particular mineral ?
A mineral's density is the amount of matter in a given space 
 Color is easily observed, but not always a reliable characteristic for the identification of minerals.
So density could be more useful then.



Wednesday, May 24, 2017

Writing Assessment


1. Coal pollution - Burning coal are cause of smog. acid rain and air pollution.
 Ex. NItrogen oxides (NOx) - Nox pollution causes ground level ozone, or somg, which can burn lung tissue.

2. Greenhouse effect - Increases in the different greenhouse gases have other effects apart from global warming including ocean acidification, smog pollution, ozone depletion as well as changes to plant growth and nutrition levels.

3. Global warming occurs when carbon dioxide and other air pollutants and greenhouse gasses collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface. Greengouse effecttrap the heat and cause the planet to get hotter.

Wednesday, January 18, 2017

In 2016 I have a good life's time with my family and friends. I went to maknoi camp and it made my life better and This year, I will do lots of homework, harder and harder to make my life easier. Also my add sci. grade, I planned to finish my unit 11 English too.


Wednesday, January 4, 2017

analysis
1. Describe how the ball rolls off the ramp at each height - discuss the effect of bouncing or other factors.
At high height the ball bouncing more than low height.
2. Discuss what is the fastest speed reached and any factors that could improve this.
Fastest speed is at 4 sec. and because the ball rolls off the ramp at 20 cm.
3. Does the ball travel in a straight line, why or why not ?
No it doesn't
Ramp isn't straight and so do it