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chap 7
hua science test 7 and 8 chapters
| Question | Answer |
|---|---|
| what is water also known as? | The Universal Solvent |
| Solubility? | disolvibility |
| saturation? | Saturation means a point where no more of something can be absorbed or dissolved. For example, if you add sugar to water, after some time, the water can’t dissolve any more sugar — it’s saturated with sugar. |
| particle theory? | all matter is made up of particles. According to the particle theory of matter, those particles are in constant motion. Particles are constantly rotating, vibrating, and moving about from one place to another. |
| evaporation and what is it's process? | Evaporation is the process by which a liquid transitions into a gaseous state below its boiling point. During the process of evaporation, water particles in a container leave the liquid (as vapour) and mix with surrounding air particles. |
| Distillation and what is it's process? | Distillation lets you to retain both the solute and the solvent from a solution. Duringprocess, the solution is boiled. Distillation is a process that involves the conversion of a liquid into vapor that is subsequently condensed back to liquid form. |
| Filtration? | Filtration is the mechanical process of separating solids from liquids or gases using a porous article or mass, such as paper or sand. |
| Sifting? | Sifting is a means of separating solids by component size. It involves shaking, agitating a solid material while it passes through a screen or mesh. ex. bakers sift flour to remove larger clumps, which helps to make the pastries light and fluffy. |
| why are some metals magnetic? | Some metals are magnetic because their component particles are attracted to the particles within magnets. |
| paper chromatography? | In paper chromatography, a highly concentrated solution is placed on a single spot and is absorbed by the paper. The paper is dipped in a solvent, such as water, so that the spot is above the solvent. |
| how does temperature affect particles? | temperature affects the speed at which particles move. Particles move more rapidly an higher temperatures, as heat is transferred by the movement of the particles. Since the rate of dissolving depends on solute particles bumping into solvent particles, |
| particle size, affects and why? | Particle size also affects the rate of dissolving. Large particles take longer to dissolve than smaller particles of the same substance. |
| Rate of Dissolving? | How quickly a substance dissolves in a solvent is variable. A teaspoon of table sugar will dissolve rapidly in a hot drink. The same amount of sugar will take much more time to dissolve in a glass of ice water. |
| Concentration, Qualitative? | The amount of solute in a solvent can be expressed in qualitative terms. A concentrated solution is a solution that contains a large amount of dissolved solute and very little solvent. |
| Concentration, Quantitative? | The concentration of a solution is the amount of solute dissolved in a specific amount of solvent. For example, if 5 g of salt are dissolved in 500 mL of water, the concentration of the solution is 5 g/500 mL (or 1 g/100 mL). |
| Solutions? | Solution = solute dissolved in solvent. |
| Factors Affecting Solubility? | temperature, the nature of the solute and solvent, and pressure, especially for gases. |
| solutions | Solutions s consist of solutes and solvents. A solute is the substance that dissolves. they are homogeneous mixture because |
| Classifying Matter by Composition? | Matter can be grouped in different ways. It can be classified as a solid, a liquid, or a gas. All matter can also be grouped into two basic categories: pure substances and mixtures. |
| what is Kinetic energy? | Kinetic energy is the energy of movement. |
| Temperature? | Temperature is the measure of the average kinetic energy of the particles in a substance. It measures how hot a substance is. |
| heat? | Heat is the energy that transfers from a substance at a higher temperature to one at a lower temperature. |
| change of state? | change of state is a change from one physical state of matter (solid, liquid, gas) to another. |
| condensation? | This change of state occurs when heat is removed. After you take a hot shower, you see water on the surface of the mirror in the bathroom. |
| evaporation? | The change of state from liquid to gas is called evaporation. Heat must also be added for this change of state to occur. When you boil water for a hot drink, you see steam rising from the surface of the water. |
| freezing/solidification | The change of state from liquid to solid is called freezing or solidification. Liquid candle wax will solidify after a candle is extinguished and allowed to cool. |
| sublimation? | The change of state from solid to gas is called sublimation. |
| deposition? | The change of state from gas to solid is called deposition. |
| matter? | Matter is anything that has mass and takes up space., the four types are: solid, liquid, gas and plasma |
| solid? | A solid is matter that has a definite shape and volume. |
| liquid? | A liquid is matter that does not have a definite shape but does have a definite volume. |
| gas? | A gas is matter that does not have a definite shape or volume. |
| pure substance? | pure substance is made up of only one type of matter. Sugar, distilled water, and copper wire are all types of pure substances |
| mixtures? | mixture is made up of two or more different substances. |
| mechanical mixtures? | mechanical mixtures closely, they do not have the same appearance throughout. They are heterogeneous. You can see the differences with the naked eye. |
| heterogeneous mixtures? | heterogeneous mixtures. This means that they are made up of many different substances, each with different appearances and properties. |
| Particles? | Particles are very small portions of matter. These particles are so small that you cannot see them with your eyes alone. |
| particle theory 1: All ..... is made up of paticles | matter |
| particle theory 2: Particles of a pure substance are all ....... | identical |
| particle theory 3: particle are in ............ motion | constant |
| particle theory 4:temperatures affect the ....... of particle movement. | speed |
| particle theory 5:Particles have forces of ...... between them. | attraction |
| particle theory 6: There are .... between particles | spaces |
| particle in motion 1: Solids: Particles ...... in place. | vibrate |
| particle motion 2; Liquids: Particles ..... around each other | slide |
| particle motion 3: Gases: Particles move ....................... and .......... in the container. | as far as the space allows and fill the space |
| Mass? | Mass is the amount of matter in an object. |
| homogeneous mixture? | when something is mixed so well you cant see it. an example is salt water. |
| a solution is .............. | an homogeneous mixture it has the same appearance throughout. |
| melting? | solid to liquid, requires heat. |
Created by:
mariam:)
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