PS+3+-+4th+Period+Brown

__Properties of matter__ __substance__- element or compound that cannot be broken down into simpler components and maintain the properties of original substance __elements-__ substance with atoms that are alike __compound__- substance formed from 2 or more elements in which the exact combination and proportion of elements is always the same __mixture__- stirred together __heterogenous__- a mixture in which different matericals distinguished easily __homogeneous__- mixture is same with out __colloid__- a mixture with particles that are larger than those in solutions but not heavy enough to settle out __suspension__- heterogenous mixture __physical properties__- any characteristics of a materical, such as any shape or size __chemical properties__- involves any substances to undergo a change that will alter the composition of the substance __physical change__- any change in size, shape, or state of matter __chemical change__- change of one substance into a new substance __rust__- chemical change __law of conservation of mass__- states that charge can be transferred from one object to another but cannot be destroy or created
 * -Physical/ Chemical Properies**

__dissolve__- the process invovles the sugar molecules being pulled away from each other __solubility__- a physical property because there is no change is the chemical formula in the substance that is being dissolved __solution__- when a solution is agitated the water particles hit the surface of the solute (sugar) faster __solute__- is a sugar solutions __solvent__- water is the solvent __molecule__- two or more atoms combined together __agritation__- the more a solution is agitated(meaning stirred), the faster the rate of solution __particle size__- protons, neutrons and electrons have the same size __temperture__- increase rate of solution __surface area__- the area inside of a 3D shape __kinetic energy__-all matter is composed of small particles (molecules, atoms and ions) __solids__- are closely packed together because there is an attractive force holding them together __liquid__- the particles of liquid are in contact with each other because there is an attractive force holding them together. __gases__- the particles of gases are not in contact with each other each other they are moving fast enouht to completely overcome the attractive force between or among the particles. __plasma (distribution of particles)-__ is matter consisting of positively and negatively of charged particles. __kinetic energy-__ a type of energy that is associated with motion. __phase change__- due to the change in movement (energy) of the particles. __freezing point__- is the temperature where a phase change occurs between a liquid and a solid. __meltiing point__- is the temperature where a phase change occurs between a liquid and a solid. __boiling point-__ is the temperature where a liquid is changing into a gas throughout the liquid. __energy__- particles of the substance increases. __temperature vs. time graph__- the line of the graph has a positive slope until a phase change occurs __sublimation__- is the process where solids change directly to gases.
 * -Factors Affecting the Rate of Solution**
 * -**Phases of Matter

-Questions 1. Which formula indicates an element? __** A. O**__ B. O­4 C. O3 D.  H2O 2. Which of the following pure substances includes two or more atoms of the same element covalently bonded? A. element __** B. **molecule__ C. compound D. atom

3. What phase change occurs when a solid changes to a gas? A. freezing B. melting C. evaporation __** D. **sublimation__

4. Which state of matter is characterized by particles that take the shape and fill the volume of the container in which they are placed? A. solid B. liquid __** C. **gas__ D. plasma

5. During the process of melting, what happens to the temperature of the substance? __** A. **it stays constant__ B. it increases C. it decreases D. it increases and then decreases

6. Which type of organic compound is essential for providing energy to organisms? A. proteins __** B. **carbohydrates__ C. amino acids D. hydrocarbons

7. Which group of organic compounds includes enzymes? __** A. **proteins__ B. carbohydrates’ C. lipids D. hydrocarbons

8. Which of the following processes would increase the rate of dissolving? A. decrease the amount of solvent B. increase the amount of solvent __** C. **decrease the size of solute particles__ D. increase the size of solute particles

9. Which state of matter is characterized by a definite volume and an indefinite shape and is easily poured? A. solid __** B. **liquid__ C. gas D. plasma

10. Which of the following is evidence that a chemical change has taken place? __** A. **evolution of a gas__ B. change from a solid to a liquid C. breaking into many small pieces D. drawing into a thin wire

11. Which of the following is a heterogeneous mixture? A. salt water B. carbon dioxide C. bronze
 * __D. __ ** __vegetable soup__

12. Which of the following can be separated by filtering? A. a solution B. a compound C. an element __** D. **a heterogeneous mixture__

13. What is a physical combination of two or more substances called? A. an element __** B. **a compound__ C. mixture D. an isotope 14. Select the phases of matter that can be compressed. A. gas only B. plasma only __** C. **plasma and gas only__ D. plasma, liquid and gas only

A. hydrochloric acid B. sulfuric acid __** C. **acetic acid__ D. nitric acid
 * 15. ** **Which of the following is not a strong acid?**





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