Thursday, May 29, 2014
Wednesday, May 28, 2014
In this investigation I think the ballons will be bigger the more gas there is. In the investigation the 5 meters was the smallest and the 10 meter was the biggest at 13 and a half centimeters. And the smallest was 12 centimeters and the middle was 13 centimeters.
Thursday, May 8, 2014
The are many facts about the ISS. One is it is 240 feet above the Earth. Another fact is there are 39 crew members on the ISS. One more fact is it is moving at 17,420 mph. One final fact is the reason it does not crash is because of gravitational pull. These are some of the facts about the ISS.
Tuesday, April 29, 2014
Matter is anything that has mass and space. They are made up of atoms. Electrons have a negative charge. They move very fast around the nucleus or the center of an atom. Everything around you is matter. Water like all matter can change states. Frozen water is called ice but when it melts it turns to a liquid this is called the beetling point and when it gets even hotter and turns to a gas this is called the boiling point. Metal on a door is a good conductor so it is warmer than the wood on the door. If a nail rusts it is called a chemical change. If you burn a piece of paper it burns into ashes this is also a chemical change. If you pour salt in a water beacore then boil the water the salt will stay in and the water will turn into gas this is called a mixture. For example, when you put things in a bowl, if you can separate them it is a mixture.
Thursday, April 24, 2014
Sound travels in waves. Sound travels in longitudinal waves. A sound wave is a chain of vibrating molecules. Vibration pushes nearby air molecules back and forth, for example when a cymbal pushes up air molecules are packed tighter. When the cymbal goes down it creates low pressure area. Put them together and you get a cycle. And the cycle forms longitudinal wave. Humans can hear sound from 20 to 20,000 cycles per second. Oscilloscopes are designed to measure sound waves. A low amplitude produces a quiet sound a high amplitude creates a loud amplitude. High frequency waves make high pitched sounds. Low frequency waves create low pitched sounds.