Wednesday, June 7, 2017


From this experiment,we have gotten how to measure mass of the objects with Cent-O-Gram scale,how to measure volume of the asymmetry objects by water displacement (Ureka) technic and how to find the objects's density by calculate with technic and how to find the objects's density by calculate with the formula (density;g/cm power 3 ,kg/m power 3)=m/v(mass;g,kg)
                                                                  (volume;cm power3,m power3)
                     From the data we have are about mass,volume and density are presented in the table.we can find that the bigger the mass of the objects are not always related with the bigger volume or more density we can order the density from the lowest to the highest as sample Nuber3,6,1,7,12,2,5,14.

Wednesday, May 24, 2017

                   The impact of society on the environment. 

Acid rain
  The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rainwater can leach aluminum from soil clay particles and then flow into streams and lakes. The more acid that is introduced into the ecosystem, the more aluminum is released.

Global warming
The planet is warming, from the North Pole to the South Pole. Since 1906, the global average surface temperature has increased between 1.1 and 1.6 degrees Fahrenheit even more in sensitive polar regions. The heat is melting glaciers and sea ice, higher sea level, shifting precipitation patterns, more storms, more floodings, rising of new viruses, and setting animals on the move.

The Rise of Powassan Virus
This virus has been known from 1958 in the USA.The disease had been rare in humans, but ecological changes have resulted in the pathogen spreading to the common deer tick, the same insect responsible for Lyme disease. This change could result in many more human infections.Severity ranges from none to fatal(only 10% of brain infection).No specific treatment, just supportive treatment we could do.

Thursday, February 23, 2017

Speed Lab Ball Bearing lab
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

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.

Time to travel 5 meters
Distance travelled













The ball released from higher ramp travel faster and further. The ball release at height 80 cm went faster than and further than 20 cm.

1. Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other               factors ?

Answer : The ball roll off at higher position went faster and longer distance than lower height. The result of the height of the ramp cause more acceleration of the ball

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

Answer : The ball with fastest speed was the one at highest angle. To improve speed, we need to change the angle higher.

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

Answer : Yes, because of the surface was smooth and does not cause friction between ball and ramp

Sunday, January 29, 2017

                       3main of ``ouds 

Displaying IMG_0319.JPG

Displaying IMG_0323.JPG


Cumulus clouds look like puffs of cotton. Cumulus clouds are the lowest of the layers.Status clouds look like flat sheets and have steady rain.Status clouds are the medium layers.Cirrus clouds look like feathers, fair weather clear blue sky and made of ice particle.Cirrus clouds are the highest layers.