Wednesday, June 7, 2017

A density







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

Key Concept Would density or colour be more useful in identifying a particular mineral? Explain your answer?
Ans:  Colour because it is easily observed, but not always a reliable characteristic for the identification of minerals.
Density us useful  because each mineral has a characteristic density (density does not vary with the size of the mineral).











Wednesday, May 24, 2017

writing assignment



    The first thing I think is acid rain, actually, there are many ways to affect the environment but, the most area is a lake. It makes the water absorb the aluminum from the soil surrounding it which make the water more toxic so the animals that live there gonna die. The second thing is the air pollution when we burning things so gas will be toxic. The last one is the effect from the oil spill because it gonna make toxic to water

Wednesday, February 22, 2017

speed lab ball bearing


The Effect of Gravity on Speed
 Introduction
Gravity provides a constant acceleration (force) on an object.  The effect is changed by using ramps at different angles. In this lab, you will find the optimal angle to maximize acceleration on a ball bearing so it travels the farthest and/or the fastest.  Friction is the opposing force created by the surface interactions.  Whenever something rolls due to a force, friction will oppose this force and slow it down.

Equipment needed:
Timer                                       Ramp                           Ball Bearing
Graph Paper (2)                       Ruler                                      

Procedure:
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  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.

Height
Time to travel 5 meters
Distance travelled
20
 2.98 s
 5 m






40
 3.66 s
 5 m






60
 8 s
 5 m






80
 6 s
44 cm 







Observations: When the height is high, the time is short, the height is low the time is long

 Analysis
1.         Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other factors.
            
 : When the height is high the ball will bounce and the distance also shorter than the ball that doesn't bounce.

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


3.         Does the ball travel in a straight line, why or why not?
:  No, because it is circle so it can go anyaway.










Wednesday, February 8, 2017


     Essay

                      This year is 2016, I have done a lot of things. This year I              have start studied in Panyarat high school. I have a lot of                 good friends. They are always help each other. In next year I           plan to more diligent in learning and speak less in bad words.

Wednesday, February 1, 2017

Cloud

                         

Cloud

       Stratus: The gray cloud that covers skylight rain and drizzle.




      


Cirrus: Feathery cloud, good weather but rain or snow may be on the way.






     Cumulus: Fluffy white clouds fair (good) weather