## Thursday, March 1, 2018

### Pulley lab

Pulley lab

We went to the lab and measure 7 rocks that have different weight and data such as weight in air, weight in water, buoyant force (weight in air-apparent),  pulley weight in air and length of string. You will see how different newton between each block.

 object weight in air apparent weight in water buoyant force (weight in air-apparent pulley weight in air length of string weight 1 0.1 N. 0.06 N. 0.04 N. 10 N. 40.5 cm. weight 2 0.2 N. 0.15 N. 0.05 N. 4 N. 44 cm. weight 3 0.2 N. 0.15 N. 0.05 N. 1.2 N. 24 cm. weight 4 0.5 N. 0.45 N. 0.05 N. 1.2 N. 31.5 cm. weight 5 1 N. 0.88 N. 0.12 N. 1 N. 32.5 cm. weight 6 2 N. 1.75 N. 0.25 N. 0.75 N. 37 cm. weight 7 2 N. 1.75 N. 0.25 N. 0.5 N. 44 cm. weight 8 5 N. 4.4 N. 0.6 N. 0.25 N. 37.5 cm. weight 9 10N. 8.5 N. 1.5 N. 0.2 N. 28 cm.

All picture

## Wednesday, February 14, 2018

Electric Charges Lab

1. Infer Why did you rub the balloon on your sweaterPredict what might have happened if you simply touched the balloon to your sweater instead of rubbing it.
ANS When the object is rubbed agents another static  electricity can be created. This because the rubbing creates a negative charge that is carried by electrons.If  you touched the balloon to your sweater instead of rubbing it, the friction will not create. The charge will not create. There aren't any charge to transfer.

2.Why do you think the balloon interacted the way it did with your sweater and with the stream of water?
ANS Because the charge is not equal.It need to make a contact to balance by it self(equivalent).

Picture in lab

## Wednesday, November 22, 2017

 blogger questions We mixed two colors paddles together under the flashlight and saw the results as shown.

R+G=Y

R+G=Y

B+R=margenta

B+R=margenta

G+R=Y

R+O=Y

B+R=magenta

## Wednesday, September 20, 2017

questions
1)  why do we add salt to the ice?
ANS Adding salt lowers the freezing temperature of the water and for winter roads, it means that the water won't freeze as easily. For our ice cream, it allows the temperature of the mixture around the ice cream to get colder.
2)   why do we add the cookies and other things, only after the milk has frozen slightly
ANS If we put topping with milk together it will freeze and not yummy.
3)  what are two factors that affect the freezing you think?
ANS Salt and temperature.
4)  why do you need a bit of air in the bag?
ANS To make the milk touch the ice.

## Wednesday, June 7, 2017

### lab

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
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 20 20 40 40 40 60 60 60 80 80 80

Observations:

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