SCIENCE XD

1.Kinetic Energy Kinetic energy is the energy associated with bodies that are in motion, depends on the mass and speed of the body. Ex: The wind when moving the blades of a mill. The kinetic energy, Ec, is measured in joules (J), mass, m is measured in kilograms (kg) and velocity, v, in meters / second (m / s). 2.Potential Energy Potential Energy is the ability of a body to perform a job according to the configuration that holds in the system of bodies that exert forces between them, that is, potential energy is the energy that is able to generate a job as a consequence of the position of a body. 3.Thermal Energy Thermal energy (also caloric energy or heat energy) is the manifestation of energy in the form of heat. In all materials the atoms that form their molecules are in continuous movement, either moving or vibrating. 4.Atoms An atom is the smallest constituent of matter that has the properties of a chemical element. Each solid, liquid, gas, and plasma is composed of

16. much discussion has focused on the need to drive more efficient cars and use less electricity. If the law of conservation of energy is true. why are people concerned about energy usage? people using the energy for all thing that are not important  17. if heat flows in only one direction, how can both hot and cold liquids reach room temperature as they sit on a table? the heat from the hot object goes in the air and the air goes to the cold liquid 18. think about what happens to jack and jill in the nursery room. what kinds of enrgy are used? how was each energy form used? if they are walking they are using kinetic energy but if they are sit down they are using potential energy 19. compare the 3 temperature scales you learned about. how are they different? how are they similar? the Celsius scale is based on 0°. many physical and scientific formulas can be expressed on the kelvin scale Fahrenheit scale, water freezes at 32° and it boils at 212 ° similar: they are all based off the f

SKILL BUILDER Endothermic                                                              Exothermic Baking Bread                                                                        Burning Wood                                                                                                    Striking A Match To Light It                                                                                                Exploding Dynamite This reaction is here because it                                       This reactions are here because each one takes heat from its environment                                     gives heat off.

I need to ocupaisse the third part of mi hous with  colector area In an example:1200=400 But I can't do that so there's an operation —————— Living space So in this example is : 400 —— 1200 So I need this for good consume of energy in my house

Skill Builder A pendulum swings seven times per minute if the string Were half as long the pendulum world swing ten times per minute  if the original lenght  Were twice as long the pendulum would  swing five times per minute  Answer  Among more shorter the rope More times it is going to swing per minute Bar graph  ----- ----- ----- -----  = 5 swings per minute ----------- ---------- =7 swings per minute  --------------------------- =10 swings per minute

TYPES OF ENERGY Energy  is all that cause work, We find energy different forms . When you eat, the body breaks down the food giving you energy, Another example is when you receives energy from the sun by radiation. The main founds of energy are kinetic and potential energy.  Kinetic energy  is the energy in motion for example: water falling over the fall. Potencial energy  is the energy stored in an object example:water at the top of the waterfall. Energy cannot be created or destoyed but it can be transformed. Mechanical energy  have potential and kinetic energy at the same time examle: when you kick a ball.  Chemical energy  it is cause by chemical reaction example: fossils and batteries.  Electrical energy  is the energy stored in charge particles within the electric field example: a microphone.  Gravitational energy  is the motion caused by gravity example: when you jumped up that forces you to come back down.