Chemistry 1305 Exam 1 Questions With
Complete Answers
Liquid - ANSWER - Particles are pretty distant
- Particles have medium energy
- Volume: fixed (not determined by the container
- compressible: little to no
Observation - ANSWER - Something we have observed
Hypothesis - ANSWER - The idea or way something that you have observed is happening
- An educated guess
- You have to be able to test it
Experiment - ANSWER - Figure out if your hypothesis is correct
- The experiment produces data
Data - ANSWER - It's the information we get
- The two Types of Data are Qualitative and Quantitative
Qualitative - ANSWER This is non-numerical: touchy feely
,Quantitative - ANSWER This is numerical
Truly Reproducible - ANSWER If someone doe he experiment whoever does he same
experiment next should get the same thing
Law - ANSWER Once we do something over and over again and get the same results it
becomes a law.
- A mathematical statement of what is observed
Theory - ANSWER This is why the law is happening
Control - ANSWER Something is constant
- Everyone in the experiment (test) is the same age, same height, etc.
Matter - ANSWER Has o have two properties: mass and volume
Properties - ANSWER The 2 properties are Physical and Chemical
Physical Properties - ANSWER the characteristics of a substance that can be observed or
measured without changing the substance
,The two types of physical properties - ANSWER intensive and extensive
Intensive property - ANSWER - A property that depends on the type of matter in a
sample, not the amount of matter
- Can be used to identify the unknown
- Independent from the amount
Intensive property examples: - ANSWER color, taste, melting point, boiling point, density,
luster, hardness, odor, solubility and temperature
Extensive property - ANSWER a property that depends on the amount of matter in a
sample
extensive property examples - ANSWER Mass, volume, length, shape, weight
Floating - ANSWER Something floats when it has lighter density than the other object
Density - ANSWER - If one thing changes another thing changes so that the proportion
or ratio remains the same
Physical Change - ANSWER The material takes a different shape but it still has the same
properties
- Its reversable
, ex: ice to water
Chemical Change - ANSWER The material is transformed into different substances
- It's properties can change, so not reversible
Three types of chemical changes - ANSWER - Combustion
- Fermentation
- Oxidation
Combustion - ANSWER the process of burning something
- wood to ashes
Fermentation - ANSWER produces chemical changes in organic substrates through the
action of enzymes
- milk to cheese or yogurt
Oxidation - ANSWER A chemical change in which a substance combines with oxygen, as
when iron oxidizes, forming rust
ex: rust on a chair
States of Matter - ANSWER solid, liquid, gas
Complete Answers
Liquid - ANSWER - Particles are pretty distant
- Particles have medium energy
- Volume: fixed (not determined by the container
- compressible: little to no
Observation - ANSWER - Something we have observed
Hypothesis - ANSWER - The idea or way something that you have observed is happening
- An educated guess
- You have to be able to test it
Experiment - ANSWER - Figure out if your hypothesis is correct
- The experiment produces data
Data - ANSWER - It's the information we get
- The two Types of Data are Qualitative and Quantitative
Qualitative - ANSWER This is non-numerical: touchy feely
,Quantitative - ANSWER This is numerical
Truly Reproducible - ANSWER If someone doe he experiment whoever does he same
experiment next should get the same thing
Law - ANSWER Once we do something over and over again and get the same results it
becomes a law.
- A mathematical statement of what is observed
Theory - ANSWER This is why the law is happening
Control - ANSWER Something is constant
- Everyone in the experiment (test) is the same age, same height, etc.
Matter - ANSWER Has o have two properties: mass and volume
Properties - ANSWER The 2 properties are Physical and Chemical
Physical Properties - ANSWER the characteristics of a substance that can be observed or
measured without changing the substance
,The two types of physical properties - ANSWER intensive and extensive
Intensive property - ANSWER - A property that depends on the type of matter in a
sample, not the amount of matter
- Can be used to identify the unknown
- Independent from the amount
Intensive property examples: - ANSWER color, taste, melting point, boiling point, density,
luster, hardness, odor, solubility and temperature
Extensive property - ANSWER a property that depends on the amount of matter in a
sample
extensive property examples - ANSWER Mass, volume, length, shape, weight
Floating - ANSWER Something floats when it has lighter density than the other object
Density - ANSWER - If one thing changes another thing changes so that the proportion
or ratio remains the same
Physical Change - ANSWER The material takes a different shape but it still has the same
properties
- Its reversable
, ex: ice to water
Chemical Change - ANSWER The material is transformed into different substances
- It's properties can change, so not reversible
Three types of chemical changes - ANSWER - Combustion
- Fermentation
- Oxidation
Combustion - ANSWER the process of burning something
- wood to ashes
Fermentation - ANSWER produces chemical changes in organic substrates through the
action of enzymes
- milk to cheese or yogurt
Oxidation - ANSWER A chemical change in which a substance combines with oxygen, as
when iron oxidizes, forming rust
ex: rust on a chair
States of Matter - ANSWER solid, liquid, gas
