<p>9.3 Guided Reading Name: “What is Energy”</p><p>1) Everything around you is full of . Without energy living could not survive. </p><p>2) In a slingshot a person energy to the elastic band. When the band snaps back it can transfer energy to a in the slingshot. </p><p>3) Work is only done when an object experiences a change in , but can be present even when nothing is happening. It can only be when it is transferred from one object to another.</p><p>4) Energy that is stored is known as energy. It is also know as energy of because it results from the relative positions of objects in a system.</p><p>5) The energy stored in a rubber band or spring is known as potential energy, while the energy stored between two objects separated by a distance is know as potential energy.</p><p>6) Gravitational potential energy depends on the of the objects in a system and the between them. The formula involves force times just like the equation.</p><p>7) The energy of a moving object is known as energy. Once an object begins moving it has the ability to do . 8) As an object falls it will and its ability to do work will as it speeds up.</p><p>9) Kinetic energy is expressed in because it is calculated using mass and speed squared.</p><p>10) In kinetic energy problems speed is so a small increase in speed produces a increase in kinetic energy. This is the reason car crashes are more dangerous at speeds.</p><p>11) The sum of both potential and kinetic energy is energy. </p><p>12) The energy in particles increases as the object gets and decreases as it down. </p><p>13) The atoms in a hotter part of iron are more rapidly than the atoms in the cooler part so they have greater energy.</p><p>14) In a chemical reaction the formation of and the breaking of involve changes in energy. This is known as energy and it depends on the positions of the atoms it contains. </p><p>15) When a match burns it releases energy from the match and produces and an explosion of hot . </p><p>16) Plants use to turn the energy of the sunlight into a chemical energy. 17) Plant energy is stored in and other organic molecules. When you eat food these are transferred to your own cells.</p><p>18) The sun’s energy comes from where light atomic nuclei combine to form a nucleus. </p><p>19) Nuclear power plants use nuclear to release energy. It involves a heavy nucleus split into two of more nuclei.</p><p>20) Electricity is the flow of particles through wires or other materials. Moving electrons can increase the temperature of a wire and make it as in a light bulb. </p>