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Chemistry Ch. 3
| Question | Answer |
|---|---|
| Matter is made up of _____ and _________. | atoms;molecules |
| Particles do not move fast enough to overcome the attraction between them. | solid |
| Particles move independently of each other. | gas |
| Particles are close together but can slide past one another. | liquid |
| Particles are close together and vibrate in place. | solid |
| Particles move fast enough to overcome nearly all of the attraction between them. | gas |
| What are ice, water, and steam examples of? | states of matter |
| What stays the same in solids? | shape and volume |
| What are two examples of solids? | crystalline and amorphous |
| Which statement is true of liquids? | fixed volume but not shape |
| What force acts on particles at the surface of a liquid? | surface tension |
| The property of liquids that describes their ability to flow is called _________. | viscosity |
| The state of matter that has no fixed shape or volume is ___. | gas |
| What is true of the particles of a gas? | move fast |
| A measure of how fast the particles in an object are moving is ___________. | temperature |
| The amount of space an object takes up is the ______. | volume |
| The volume of a gas depends upon the size of the _________. | container |
| The amount of force exerted on a given area is called ________. | pressure |
| The relationship between the volume and pressure of a gas is called ___________. | Boyle's Law |
| The relationship between the volume and temperature of a gas when pressure remains constant is know as _____________. | Charles's Law |
| Helium is a ___. | gas |
| A measure of the speed of molecules is the ___________. | temperature |
| The amount of space matter takes up is its ______. | volume |
| When the amount of force per unit area increases, the ________ increases. | pressure |
| The pressure in a ball can be increased by adding more _________. | particles |
| The relationships between temperature, pressure, and volume are described by _________________ that involve a fixed amount of gas. | gas behavior laws |
| Volume and pressure of a gas are inversely related. The temperature must stay constant. This is ___________. | Boyle's Law |
| Volume and temperature of a gas are directly related. The pressure must stay constant. This is _____________. | Charles's Law |
| Which has the most energy? | particles in steam |
| When a substance changes from one physical form to another, we say the substance has had a(n) _______________. | change of state |
| The temperature at which a substance changes from solid to liquid is the _____________ of the substance. | melting point |
| Melting is considered a(n) ___________ change because energy is gained by the substance as it changes state. | endothermic |
| A substance's ______________ is the temperature at which it changes from a liquid to a solid. | freezing point |
| What happens if energy is added or removed from a glass of water? | energy added->boils->gas energy removed->freezes->solid |
| Freezing is considered a(n) __________ change because energy is removed from the substance. | exothermic |
| The change of a substance from a liquid to a gas. | evaporation |
| The change of state from a liquid to a gas when the vapor pressure equals the atmospheric pressure. | boiling |
| The pressure inside the bubbles of a boiling liquid. | vapor pressure |
| The temperature at which a liquid boils. | boiling point |
| As you go higher above sea level, the ___________________ decreases and the _____________ of a substance gets lower. | atmospheric pressure;boiling point |
| The change of state from a gas to a liquid is ____________. | condensation |
| At a given pressure, the condensation point for a substance is the same as its _____________. | boiling point |
| For a substance to change from a gas to a liquid, particles must ______________. | clump together |
| The change of state from a solid to a gas is called ___________. | sublimation |
| The speed of the particles in a substance changes when the ___________ changes. | temperature |
| The temperature of a substance does not change before the _______________ is complete. | change of state |
| When energy is gained by something during a change of state, a(n) ___________ change occurs. | endothermic |
| The melting point of a substance is the same as its ________ point. | freezing |
| When energy is removed from a substance, a(n) _________ change may occur. | exothermic |
| The particles break away from each other during ___________. | evaporation |
| When water boils, a(n) _______________ occurs. | change of state |
| Dry ice changes from a solid to a gas during ___________. | sublimation |
| Sublimation is a(n) ___________ change. | endothermic |
| When the ___________ of a substance changes, the speed of the particles also changes. | temperature |
| List the steps of the water cycle. | freezing->melting->evaporation->condensation |
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itslizzie143
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