It appears big, white, and puffy. A cumulus cloud is easy to identify when you look at the sky. The shape looks flat on the bottom and rounded on the top, and the sky in between the clouds is generally blue. Cumulus clouds are lower in the atmosphere, about 1,000 feet from the ground.
Low and have a uniform gray in color and can cover most or all of the sky. Stratus clouds can look like a fog that doesn't reach the ground. Light mist or drizzle is sometimes falling when stratus clouds are in the sky.
Cirrus clouds are the wispy clouds that form at high altitudes. They are up so high they are actually made of ice particles. They are indicators of fair weather when they are scattered in a clear blue sky.
My group picture
My first year in Panyarat high school, I don't think that I have anything special for this year.
My favorite activity in science class is the fish and shrimp lab because I like doing experiment. It gives us new knowledge. Next year, I hope that my English will improve more.
Wednesday, 11 January 2017
The Effect of Gravity on Speed
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.
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
At the height 20 cm, the ball moved the fastest.
At the height 20 cm, 40, and 60, the ball moved the furthest.
At the height 80 cm, the ball moved the slowest.
1. Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other factors.
The ball will be bouncing more when the height increases.
20 cm = the ball goes straight.
40 cm = the ball has a little bouncing.
60 cm = the ball bounces more.
80 cm = the ball bounces the most.
2. Discuss what is the fastest speed reached and any factors that could improve this.
5 m/ 4.34 seconds = 1.15 m/sec.
The factor that can improve the speed is the height.
3. Does the ball travel in a straight line, why or why not?
No because the force on the ball is not balanced.