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homework 28/9/17

How does a solid become liquid This becomes when a solid like ice or iron get the temperature more tan 300C and make that the particles move very fast in the structure of the material make them melt in the case of the ice is more than 50C. Freezing Is when the particles don't move in the structure of a material for example water.Its become when the temperature digress to 0C and in metal is less dan -30C to make that the particles stop on the metal lake the iron.

homework 27/9/17

Kinetic theory of matter: Is a theory that is the states of mater: liquid,solid and gas.The matter is anything that takes up space and has mass,all the this you see are make of matter. Atoms: Are the particles more Little in the world this particles make up all the things that has mater and the combination of atoms of some materials make new ones like: water, metals and some reactive materials. Matter in motion: Are the cominacion of irregular particulars in material like water, the scientific Robert Brown discover this irregular particulars in 1827,whit a microscope examined water and discover pollen grains and dye particles in the water,and this is part of the KINETIC THEORY. T emperature and Heat: Temperature is the masher of a material to determined if is cold or hot and Heat is the then fer of thermal energy to a material, this proses make that the particles move faster and make the material hot.

homework 25/9/17

16 : much discussion has focused on the need to drive more efficient cars and use less electricity is true, why are people concerned about energy usage? A:Because they think that the energy will get over. 17: if heat flows in only one direction, how can  both hot and cold liquids reach room temperature as they sit on a table? A:because the heat is transfer with butting something cold in something hot. 18: think about what happens to Jack and Jill in the nursery rhyme. What kinds of energy are used?How was each energy from used? A:potential energy, because is not moving at all. 19: comper the three temperature scales you learned about.How are they different?How are they similar? A:DIFFERENT:une Si a scientific scale and the other are normal scale. SIMILAR:are scale for mashurate temperature. 20: use what you know about the movement of termal energy to explain why you would place a minor burn on your arm under cool,running water? A:to transfer cold temperature to the hot une.

homework 18 9 17

When selecting an energy source for heating a home, consumersthy to think about cost.Do the CHAPTER 2 SKILL ACTIVITY on pg 783 and use proportions to determine the área of the solar collector needed to heat a home. collector área =400ft  =1 living space    =1200ft  =3
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homework

Word Processing Think of a problema faced by your community such as wáter pollution.Using a wold processor,write a report describing how you would desing a robot or an ROV to help solve the problema. awnsure: problema:insegurity I prubos a robor that can the información nesesari to cath a thief on 30minutes after the stole and can chach the drug dealer in ther hiden ples and can stop the traffic on the strits.