Phase change

A phase change is a change from one state to another. One phase change that I saw outside of class was when an ice cube turned into water, I placed one ice cube on the table and I saw that it was slowly turning into water. This happens because the ice cube wants to be the same temperature as the table. The table is giving its heat to the ice cube so the ice cube's molecules will start to move faster, and when the molecules move faster they have harder time holding on to each other, so the ice cube becomes less solid and more liquid. The heat is being removed from the table and adder to the ice cube. The ice cube changed from a solid to a liquid, this transition his called melting.

Too Hot/ Too Cold

        Three things that heat up at different rates are: water, metal and glass. This is because some substances requiere less heat energy to increase their temperature, this is called "Specific Heat". Also since metal is a conductor and glass an insulator it would be easier for the energy to go through the metal so it will get heated up faster. 🔥

Doppler Radar

    I think that waves are used to show what is happening on the weather by showing when there's storms, huracanes or other natural disasters. Probably when the waves have a higher frequency is when the storms are getting closer to us and when the frequency is lower it means that it is far away.

   After some reacher I know that the basics of radars is that a beam of energy, called radio waves, is emitted from an antenna. As they strike objects in the atmosphere, the energy is scattered in all directions with some of the energy reflected directly back to the radar.

Interferences

The difference between constructive and destructive interference is that contructive interference is when the crest of a wave has been combined  with the crest of another wave to increase its amplitude while a destructive iterference is when the crest of a wave is combined with the trough of another wave to decrease the amplitude they are the opposite of each other.

Constructive interference 

 An example of constructive interference is when someone is on a swing because the person keeps adding force on the swing to make the swing go higher. An exaple of destructive interference is whan you drop 2 drops of water in a pool (or anything that is holding a liquid) at different times.                                     
 
           

Destructive interference

   

Standing wave

Today we did a lab in class that was about making waves with different wavelenghts, we wanted to find out the frequency of the waves in 10 seconds. From this lab I learned that the more wavelength there is in a wave the less frequency it has. This means that if you have a wave with a wavelength of 6m its frequency is going to be small and if you have another wave with a wavelength of 1.2m the frequency will be higher, and an the end when you calculate the speed of both waves the 2 waves will have a similar speed.

No effect

I thought that the weather affected people's feelings but it really doesn't because some people might like rainy days but not sunny days and other might be the opposite or like both or none.

I also thought that the louder we talked the fastests we will ear but how loud or how low you talk doesn't affect how fast or slow we hear. I learned this because the teacher explained us.

Simple harmonic motion

You know that something is simple harmonic motion if it goes up, down or back and forth. An example of simple harmonic motion is a slinky because it goes up and down, another example is a pendulum because it goes to the sides and the last example is a guitar this is simple haemonic motion because when a musician strums a guitar the vibration of the string creates sound waves that we ear as music.

Electricity generator

   The generator that Im most interested in is the natural gas generator. I like this generator because its not expensive, you can use it anywhere, it burns cleaner, you get instant energy and its safer than the other generators. This generator works just as coal.




  Some disadvantages of using this generator is that is toxic and flammable, its non-renewable, and also its a complex procces. There are some disadvantages for using this generator but all the others also have disadvantages and this is one of the only generators that does not damage our animals.

Appliance

100-240v, 50~60Hz, 300mA




100-240v, .45A




 125v, 7A

Circuit Diagram

I think that we use symbols to represent things easier, and because we cant write on diagrams. Something easy about symbols is that we don't need to write anything and in a way is better to define things. Something hard is that sometimes symbols can mean more than one thing and we might not know which definition are we using in a situation.

Pretzel Circuil

 

       Today we made a Circuit where the pretzel bag represented a battery, the students represented electrons, the pretzels represented volts and there where two students with a box that represented light bulbs. We did this in a Series Circuit and on an Parallel Circuit.

       In a Series Circuit the current always stays the same, this means that when 30 electrons (students)  passes by the battery (pretzel bag) there was going to be 30 electrons passing through each light bulb. And in a Parallel Circuit the current will add up that means that if  28 electrons passed by the battery theres was going to be 16 electrons passing through one light bulb and 14 passing through the other one.

Van de Graff

  

      I wasn't in school that day, but my friend Clarydeliz told me that the electricity was moving through the objects, she also told me that when a conductor was near the ball, the ball would release negative energy to the object. I would like to see what would happen if there's an insulator close to the ball.

Insulator & conductors

                                                                                                                

     An insulator that I have been in contact with is a water bottle this is an insulator because its made out of plastic and its hard for electricity to go through it. A conductor that I have been in contact eith is a penny, this is an insulator because iys very easy for electricity to go through it.

Electricity so far

   Electricity is a form of energy, and its made because of the movement of the electrons in an atom. So far I learned that electricity is made out of burned natural gas and coal. Im getting better at what is an atom and the parts of an atom. Im still confused with how do they make natural gas and coal to become electricity and    how they make it to come to us so that we can use it?

Electricity vocabulary

So far I know that electricity is formed by atoms, on an atom there are protons (+), and neutrons (0) located at the nucleus and there are electrons (-) going around the nucleus. I also know that electricity flows through conductors which is what makes the electricity not to flow away.

 I think that I need more help with how is electricity made and how it works because I don't think that what I said is right..

No wires world

                                                                                            Due: 02/03/16

    I would name this world "The Wireless Planet" because we won't need wires to have electricity. That would be a cool invention because we wont need wires to turn on a light bulb and other things. Its going to be just like Wi-Fi. I found out that someone called DR Katie Hall is already looking for ways to transfer power without wires, I think that this is going to be one of the coolest inventions that someone can make. Something really cool that we can do without wires is that we can use electricity EVERYWHERE. And we wont need to plug things in order to use it. Something horrible that can happen with electricity floating everywhere is that we might get electrocuted or something like that.

Electric Light

 On friday Jan. 8th,  2016 I didn't went to school because I had to travel to another state, Therefore I don't know what we did in class that day. But my friend Clarydeliz told me that they did an activity to light up a light bulb with a battery and a wire, I think that the electricity worked by sending the energy from the battery to the light bulb and thats how the light bulb lit up.