Thursday, May 25, 2017

The impact of society on environment

1. environmental pollution resulted in increase of temperature of atmosphere which resulted in global warming.

2. Green house resulted in increases the global temperature and global warming because in earth have a lot of Chlorofluoro carbons carbon dioxide, Methane and Nitrous oxide  

3. Acid rain resulted lives of plants and animals, damages stone statues and buildings. It reduces productivity of crops, forests and grasslands. It causes skin and respiratory diseases in man. Due to acid rain leaves of plants turns yellow and brown.


Wednesday, February 22, 2017

Individual Project


 What is clouds?


Types of clouds?


Cumulus 




Cirrus




Stratus



Nimbus



My video

By Mon Bright Deer

Wednesday, February 1, 2017


Highlight in PHS

  In first year at Panyarathighschool, I get many good in knowledge such as adaptation, feeding relationship variation, classification, atmosphere and speed.

  I did made many lab, I like the most is fish and shrimp lab because I did feed fish and shrimp. It is best for study fact. 

  In next year, I will hope good think in add science.



Classifying Clouds

   

Stratus

Sheets of low, grey clouds that bring light snow or rain.


Cirrus

Thin, feather like clouds made of ice crystals high in the atmosphere.

Usually means a change in the weather is coming.

Cumulus

White and fluffy clouds that usually mean good weather.

Thursday, January 5, 2017



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 anyway.