Chpt 9 Les.3 Science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Most matter can be found in what 3 states? | solid, liquid, gas
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| What is the measure of the average amount of kinetic energy of the atoms/molecules in a material? | temperature
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| Temperature measures what type of energy? | kinetic energy
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| Where is the kinetic energy that is measured as temperature found? | in the atom/molecules in the materia;
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| What is needed to change a state of matter? | energy
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| When a substance goes from a solid to a liquid to a gas what must the substance do with the energy to make this happen? | it must absorb the energy (energy is added)
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| To make a substance go from a gas to a liquid to a solid what happens to the energy? | the energy is removed
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| When energy is removed what 3 things happen? | 1. the substance cools
2.molecules slow down
3. molecules move closer together
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| Name the fourth state of matter. | plasma
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| What happens to the energy in the state of plasma? | there is so much energy that all of the electrons have separated from the nuclei of the atom
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| What is the temperature like during the state of plasma? | very high temperature
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| Changing from a gas to a liquid as heat is removed and the particles lose energy and slow down...what are you called? | condensation
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| How are a substance's melting point and freezing point related? | they are at the same temperature
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| What is at the same temperature for a substance? | melting point and freezing point
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| What 2 things do most substances do when they freeze? | !. shrink and 2. take up a smaller volume
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| What substance behaves differently when it freezes? | water
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| What does water do when it freezes? | 1. expands and 2. takes up more volume
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| Water changes from ______ to _______ when it freezes. | liquid to a solid
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| What occurs when a liquid reaches a temperature at which bubbles of gas form rapidly throughout the liquid? | boiling
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| Boiling occurs when a liquid reaches a temperature at which bubble of _______ form rapidly throughout the liquid. | gas
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| What happens on the surface of a liquid at any temperature below the boiling point? | evaporation
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| True or false Molecules at the surface of a liquid have enough energy to escape? | true (they escape through evaporation)
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| When you increase pressure on a gas what happens to the volume? | it decreases the volume
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| How can you decrease the volume of a gas? | increase the pressure
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| Why does increasing pressure on a gas decrease the volume? | The space between the molecules decrease and the air inside the balloon has a smaller volume.
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| What happens to gas when it is cooled? | it contracts
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| What happens to gas when it is heated? | it expands
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| For gas, as temperature decreases, the volume____________________. | decreases
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| For gas, as the temperature increases, the volume _______________. | increases
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| When you change the size, shape, or state of matter of a substance without forming a new substance this is called what? | physical change
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| What is the process that occurs when the molecules of a solid move apart and are separated by the molecules of a liquid? | dissolving
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| What speeds up the process of dissolving? | heat
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| In dissolving, heat causes different molecules to move around faster so they can ______more rapidly. | mix
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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