Show:
States of Matter
Classifying Matter
Chemical Changes
Gas Behavior
Changes in States
100
What is viscosity?
viscosity - a liquid's resistance to flowing
100
When atoms combine, they form a __________ _______ which is a force of attraction between two atoms.
What is chemical bond.
100
What does the Law of Conservation of Mass state?
The Law of Conservation of Mass states that during a chemical reaction, matter is not created or destroyed. (Atoms may be rearranged to form new substances)
100
If temperature of a gas at a constant volume increases what happens to the pressure of the gas?
The pressure will also increase
100
What is the process called when a liquid changes to a gas leaving solid components behind?
What is evaporation.
200
______ ________ is an inward force or pull among the molecules in a liquid that brings the molecules on the surface closer together.
What is surface tension.
200
What is the basic particle from which all elements are made?
What is atoms.
200
What type of change occurs when chemicals bonds break and new bonds are formed?
What is a chemical change.
200
The greater the speed of gas particles in a container, the _______ the pressure.
What is greater.
200
What is the process called when a liquid changes to a solid?
What is freezing.
300
This state of matter has a definite shape and definite volume. This state also has particles arranged in a regular repeating pattern forming _______ ________ and particles not arranged in a regular pattern _________ ______.
Solids Crystalline solids Amorphous solids
300
________ are two or more substances that are together in the same place but thier atoms are not chemically bonded.
What is a mixture. Examples - sand, salad, & salt
300
Explain the difference between endothermic and exothermic reactions. Also give one example of each type of reaction.
Endothermic Reaction is when energy is absorbed by nearby matter (surrounding become cooler). Examples: baking soda and vinegar, frying an egg, melting of ice Exothermic Reaction is when energy is released (surroundings get warmer). Examples: stoves that use natural gas, fire (candle,etc.)
300
Which law states when the temperature of a gas at a constant pressure is increased, its volume increases.
What is Charles's Law
300
What is the process of a solid changing into a gas called?
What is Sublimation.
400
Describe the particles of a liquid.
Liquid - the particles are packed almost as closely together as those in a solid, but can move around one another freely.
400
A _________ is a group of two or more atoms held together by chemical bonds.
What is a molecule.
400
What are the substance that go into a chemical reaction called? What are the substance formed after a chemical reaction called?
What is Reactants. What is Products.
400
Which law states when the pressure of a gas at a constant temperature is increased, teh voulme of the gas decreases.
What is Boyle's Law
400
An uncovered pot of water is simmering on a stove. Water droplets form on the wall behind the stove. What has occured?
What is vaporization and then condensation.
500
Describe the particles of a gas. Describe the particles of a solid.
Gas particles spread apart and fill all the space available to them. Solid particles are packed tightly together in fixed positions.
500
What are the two types of mixtures? Explain the difference in these two types of mixtures.
Homogeneous and Heterogeneous Mixtures Homogeneous - evenly mixed and you can not see the different parts. It is also difficult to seperate out. Heterogeneous - you can usually see the different parts and they can be easliy seperated out.
500
What can be placed in front of chemical formulas to balance a chemical equation?
What is coefficient.
500
At constant pressure, how are the temperature and voulme of a gas related?
directly proportional
500
When vaporization takes place both below and at the surface of a liquid it is called?
What is boiling.