<p> Guided Reading Chapter 10 Section 1 and 2</p><p>1. What is Brownian motion? How does it provide evidence that matter is made of atoms and molecules?</p><p>Irregular, jerky motion of particles; all tiny particles are moving.</p><p>2. Matter is anything that has mass and takes up space.</p><p>3. A(n) Element is the smallest bit of matter that is pure and can’t be broken down into any other smaller substance by physical or chemical means.</p><p>4. A(n) Atom is the single smallest particle of an element that retains the chemical identity </p><p>5. A compound is a substance that contains Two or more different elements joined chemically, and has the same composition throughout.</p><p>6. Sketch the picture of an element, compound, and mixture at the bottom of page 230. </p><p>Element Compound Mixture</p><p>7. Using words and looking at the diagram from pg 230 describe how elements, compounds and mixtures are different from each other.</p><p>Element – only 1 kind of atom</p><p>Compound – 2 or more atoms, 1 type of molecule</p><p>Mixture – any combination of 2 or more elements and/or compounds (physically combined) 8. The three units used to measure temperature are Celsius, Fahrenheit and Kelvin (last one is found on pg 238).</p><p>9. Thermal Energy is caused by the back and forth “jiggling” of molecules.</p><p>10. A Thermometer is an instrument that measures the exact temperature.</p><p>11. Digital thermometers work by measuring a change in Electrical Resistance which changes with a change in temperature. </p><p>12. While there is no upper limit to temperature there is a lower limit called Absolute Zero, It is the temperature at which molecules Cease moving entirely.</p><p>Vocabulary Chapter 10 Section 1 and 2</p><p>1. Matter is anything that has mass and takes up space.</p><p>2. A pure substance that cannot be broken down into simpler substances by physical or chemical means is a(n) Element</p><p>3. The smallest particle of an element is a(n) Atom</p><p>4. A(n) Compound is a substance that contains two or more elements that are </p><p>5. A(n) Molecule is a group of two or more atoms joined together by chemical bonds.</p><p>6. A(n) Pure Substance cannot be separated into other types of matter by physical means. 7. Matter that contains a combination of different elements and/or compounds and can be separated by physical means is called a(n) Mixture</p><p>8. A(n) Homogeneous is a mixture that is the same throughout.</p><p>9. A(n) Heterogeneous is a mixture that is not the same throughout.</p><p>10. Temperature is the measure of the average kinetic energy of the particles in matter</p><p>11. Farenheit is a temperature scale in which water freezes at 32 degrees. This is used in </p><p>12. Celsius is a scale in which water freezes at 0 degrees. This is used in science.</p><p>13. Energy due to temperature is called Thermal Energy </p><p>14. You measure temperature with a(n) Thermometer</p><p>15. The lowest possible temperature is called Absolute Zero</p><p>16. The Kelvin is a temperature scale that starts with absolute zero.</p>