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converting to a smaller unit
converting to a larger unit |
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| Anything less than the density of water will float. Anything more will sink |
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1/2mv^2
the energy an object has due to its motion |
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GPE=MGH
the energy an object has due to its position. |
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| the amount of thermal energy to heat 1 kg of a substance by 1ºC |
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| A search for patterns in nature in an attempt to understand it and to form an organized body of knowledge that has predictive power and application in society. |
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1. State the problem or question
2. Gather information.
3. Form a hypothesis.
4. Test the hypothesis
5. Analyze data
6. Draw conclusions |
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| the thing you can control and change |
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| what changes based on the experiment |
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| Things you have to keep the same in order for the experiment to be valid. |
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| A term that you put in front of another verb |
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| A visual display of information or data |
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| You can put a lot of information in a visual picture and in an organized way. |
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a title
a key (if necessary)
labels for x and y axis |
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| a graph that shows the relationship between an independent and dependent variable. |
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| useful for collecting info by counting. Each bar represents a quantity counted at a certain time. |
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| used to show how a fixed quantity is broken down into parts. Each slice represents a percentage of the total. (percentage • 360º)= angle on graph. |
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-matter is composed of partiles that are always in random motion
2. different speeds and directions
3. B/C they are in motion they have kinetic energy which can be transferred from one particle to another. |
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| measure of the average kinetic energy in a substances' particles. As the speed of particles in motion increases, the temperature increases |
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| Thermal heat flowing from something from a higher temperature to a lower temperature |
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solid to a liquid- melting
liquid to a solid- freezing
liquid to a gas- vaporization
gas to a liquid- condensation |
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| freezing and boiling point of water |
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| particles in any state expand when heated (generally) |
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| Transferring thermal engery |
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conduction-direct contact
convection- through a fluid
radaition- through electromagnetic waves |
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| materials that transfer heat easily |
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| transfer of heat between objects or particles. Collisions increase when objects are heated. Hotter to cooler part. |
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| hear transferred through space |
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| heat transferred by the movement of molecules within a substance. warmer to cooler areas. |
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| material that does not transfer heat easily |
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| anything that has mass and occupies space |
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| Matter that has only one set of chemical and physical properties. Compounds or elements. |
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| 2 or more pure substances mixed together. Each substance in the mixture retains its own set of physical properties. |
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| uneven distribute of substances of substances (very impure) |
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| components are evenly mixed together. Cannot see the parts. Can still be separated by physical means. |
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| two or more elements that are chemically bonded together. Have one set of properties and can only be separated by chemical process |
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| substances made up of only one type of atom. Cannot be separated by any physical or chemical process. |
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| A characteristic of a substance that can be observed without changing the identity of a substance. |
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| describes how substances can form new substances, they can be identified by the changes that they produce. |
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| general physical properties |
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| size, texture, color, density, shape, mass, volume |
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| a change in any physical property itself. not permanent |
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| the change of one substance into another. permanent. |
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| signs of a chemical change |
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| production of a smell, change in temperature, change in color, formation of bubbles, formation of a solid or precipitate. |
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| Energy is released and the area surrounding the reaction increases in temperature. |
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| energy is absorbed and the are surrounding the reaction decreases in temperature. |
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| Law of Conservation of Mass |
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| the mass of all substances that are present before a chemical change is the same as the mass of the substance after the chemical change. |
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| How do you test your question? |
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| particles are vibrating in place. Very attracted to eachother. little kinetic energy |
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| more kinetic energy than a solid. Particles are very attracted to eachother but not as attracted as in a solid. Particles can slide past eachother. |
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| a lot of kinetic energy. particles are moving very quickly and not attracted to eachother |
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| the energy required to melt and freeze a substance |
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| the energy required to turn a liquid into a gas and vice versa. |
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| what happens to air when heated? |
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heat of fusion, heat of vaporization
during phase changes the temperature doesnt change |
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heat of fusion, heat of vaporization
during phase changes the temperature doesnt change |
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GRAVITATIONAL potential energy
mass gravitational pull height |
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