Science

Problem
What type of ball will roll the farthest on carpet a golf ball or a big bouncy ball?

Hypothesis
I think that the golf ball will go the farthest because of the fact that a gelatin like substance would stick to the fibers of the carpet more easily than the glazed like surface of the golfball.

Materials
Golf ball
Bouncy ball
Yard stick
Carpet floor

Variables
Cv- Balls, ruler, floor
Iv- the length
Dv- distance
Control- length

External variables
The speed we roll the ball
The path it travels


Experiment
1. Gather materials
2. Start trials one at a time
3. Start the golf ball trials first or whichever ball you prefer
4. Begin by rolling the golf ball
5. Record how far it got.
6. Repeat steps 4 and 5. 2 more times
7. Now begin rolling the giant bouncy ball.
8. Record what you have
9. Repeat steps 7 and 8. 2 more times
10. You should have even number or trials
11. Graph
12. Conclude
13. Clean up station

Observations

Conclusion
Our problem for this experiment was what type of ball will roll the farthest on carpet a golf ball or a big bouncy ball? What I had predicted was that the golf ball would go farther due to its less sticky surface compared to the bouncy ball. When I rolled the bouncy ball I could tell that the way it rolled was it would not rotate as fast as the golf ball would because it would pick up more fibers where as the golf ball would just glide across the top of the carpet. This is why the results favor the golf ball more than the bouncy ball in the experiment.

Problem
How long will it take a red ball (13.1g) and a yellow ball (11.6g) to fall from a 4 foot object?

Hypothesis
The yellow ball is made out of foam so it will take a longer time than it will the red ball because the red ball is plastic.

Materials
1. red ball
2. yellow ball
3. ruler
4. timer
5. timers

Variables
Cv- height, balls, the way we time it
Iv- the speed
Dv- impact
Control- the average speed

External variables
Trying not to throw the ball down
good reaction timers
The time

Experiment
1. gather materials
2. measure 4 feet off ground
3. drop ball
4. time ball
5. repeat these steps 2 more times with both balls
9. graph
10. conclude
11. post on blog

Data table
finish time Start speed Final speed
Red ball 0.13 0.12 6.5 7 11.1 12.5
Yellow ball 0.11 0.14 7.7 8.2 14.3 20

Observations

Conclusion
The problem for this experiment was How long will it take a red ball and a yellow ball to fall from a 4 foot object? My hypothesis was correct because i said "The yellow ball is made out of foam so it will take a longer time than it will the red ball because the red ball is plastic." which was indeed correct because the red ball has more mass than the foam ball. Another reason why this could have happened were that the foam ball has some holes which would catch the air like a parachute.

MY PROBLEM: What weight car will make a domino go the longest distance when it is hit by the toy car?


HYPOTHESIS: I believe that the heavier toy car will make the domino go the greatest distance. From former experience the more something weighs the faster it falls so when the toy car goes down the ramp it will have more speed and then hit the domino the farthest.




EXPERIMENTAL DESIGN ( CV, IV, DV, MATERIALS)




Materials: 2 tracks, 4 toy cars(different weights), 1 domino, 1 Yard Stick, Tape




CV: Ramp hight, How far the domino is from the end of the ramp, type of domino

IV: weight of tay car

DV: How far the toy car hits the domino




Procedure:

1. Gather all materials

2. fit the 2 tracks together to make a ramp.

3. tape the Ramp to the wall at a height of 2 feet.

4. Set a domino 4 inches away from the ramp.

5. measure how far the domino is away from the wall and record it in excel.

6. drop test toy car one down the ramp.

7. Measure how far the domino went after the toy car hit it.

8. Repeat steps 4-7 2 more times

9. Repeat steps 4-8 with test toy car 2

10. Repeat steps 4-8 with test toy car 3

11. Repeat steps 4-8 with test toy car 4

12. Clean up your station.


Data table,
trial 1 trial 2 trial 3 weight(grams)
car 1 7 3/4 8 1/8 7 3/4 1.8 7 7/8
car 2 2.5 2 1/4 2 1.15 2.25
car 3 6 3/8 5 1/2 5 3/4 1.25 5 7/8
car 4 2 1/3 3 3/4 2 1/2 1.05 2 6/7

Graph,

EXTERNAL VARIABLES

how the toy car rolls after it is off the track




EXPERIMENT RESULTS:

My Hypothesis was correct that the heaviest car would hit the domino the farthest. In the experiment car 1 made the domino go the farthest on all three trials; The next closest was car 3 and on all three it was at least one foot away or more from car one. The first cars average was 7 and 7/8 feet the next closest average was 2 feet less than the first cars.One external variable that we had was after the car got of the track it would not roll strait. I would put the domino closer to the track next time.

Rube Goldberg

What my group did for our rube Goldberg was we tried to get mentos in a coke can and the light to turn off. Our problem succeeded and we were very proud of our accomplishment. To start the problem off we wanted to get the mentos in the can because we knew that would be the most difficult. At the beginning of the problem water would enter a cup followed by it hitting a mento and then having that mento roll down a screw made of paper plates and a tube. after it rolled down it would slowly slide into a 1 leter can of coke. while that was going on the water would also hit a train sitting on top of a piece of wood that would roll down and hit a book held up by a cup turning the light off that it was attached to by string.

Solar Energy

What is solar energy? Well the ways I have known solar energy is it harnesses the power of light to make into energy to power are houses. How does this happen however? Solar energy relies on things called a heat engine and photovoltaic. These are what help the solar panels grab and transfer sunlight.

Solar variation refers here to changes in the amount of total solar radiation and its spectral distribution over multi-annual to multi-millennial time-scales. There are periodic components to these variations. Solar activity has been measured by satellites during recent decades and estimated using variables in prior times. Scientists studying climate change are interested in understanding the effects of variations in the total and spectral solar irradiance on the Earth and its climate.

The life cycle of solar cells starts with silicon dioxide (SiO2), which is reduced in a blast surface to produce metallurgical grade. It is then further purified to obtain high purity PolySilicon equivalent to electronic grade, which is used as a “Feedstock” for making the solar silicon wafer.

But the real question is how can we use it? This is a question that scientist have been asking for while. Can we use it in or on cars? Scientists have researched and have come up with a model called the Consortium it’s a solar powered car straight out of something you would see in a star wars movie. It is a yellow car based all around solar panels that receive solar energy and charge the car while it’s going so no need for a gas station.

Another way you can use solar energy is to put them on appliances such as solar refrigerators and ovens and practically your whole house. Solar energy can be harnessed in so many ways and researchers at the Maine University developed a house all made of solar panels and solar appliances. This is how solar energy can be used in the world today.