Classifying Matter
All matter can be classified as either _____ or _____.
All matter can be classified as either PURE SUBSTANCES or MIXTURE.
Physical properties of matter can be observed/measured without changing the _____ of the substance.
Physical properties of matter can be observed/measured without changing the COMPOSITION of the substance.
Chemical Properties can only be observed when the substances in the sample are changing into ____ substances.
Chemical Properties can only be observed when the substances in the sample are changing into NEW substances.
What is the main difference in what happens with a physical change vs a chemical change.
Chemical changes result in the formation of a new substance, physical changes do not change the composition of the substance.
Which state of matter has the strongest force of attraction among its particles?
Solids
Which classification is the simplest form of matter that cannot be broken down into simpler substances?
Elements
_____ measures the ability to cut or scratch other substances.
HARDNESS measures the ability to cut or scratch other substances.
True/False: Melting Point/Boiling Point are both examples of chemical properties since the matter will go through a phase change if these properties are observed.
FALSE: These are physical properties because when these properties are observed the substance's composition remains the same
Give me an example of a physical change and chemical change that would each result in a change in color.
Physical - heating metal until it glows red
- mixing food color and water
Chemical - leaves changing color
- iron rusting
Matter is defined as a solid liquid or gas based on its _____ and _____.
Matter is defined as a solid liquid or gas based on its
shape and volume.
Give an example of a heterogeneous and homogeneous mixture.
Answers will vary
Name 2 substances that would be considered to have high viscosity.
Syrup
Honey
Lava
Tar
Flammability is the ability to burn in the presence of _______.
Flammability is the ability to burn in the presence of OXYGEN.
OTHER THAN A COLOR CHANGE, Give me 3 clues that a chemical change may have occurred.
- formation of a precipitate
- production of a gas
- production of heat or light
- change in odor
What does Kinetic Theory of Matter Say?
all particles of matter are in constant motion
Describe could I separate parts of a solution such as salt water? What is the process called?
Separate based on differences in boiling points. This is known as dustillation
Density is equal to....
Density is equal to mass / volume
How likely a substance is to combine with other substances.
Reactivity
Give an example of a physical change that is not reversible
answers will vary
Name all phase changes that are endothermic.
Melting
Vaporization
Sublimation
Explain how compounds and mixtures are different.
Compounds are chemically combined, Mixtures are physically combined.
Compounds have a fixed composition, the composition of mixtures can vary.
How can density be used to determine if an object will float or sink when placed in a liquid?
If the object's density is greater than the density of the liquid it will sink;
If the object's density is lesser than the density of the liquid it will float;
Which of the following properties are chemical properties? (list all that apply)
malleability
reactivity
color
conductivity
toxicity
reactivity
toxicity
Identify each example as a physical or chemical change:
1) A candle melting
2) chopping wood
3) Fire burning
4) dissolving salt in water
5) mixing baking soda and vinegar to make CO2
Identify each example as a physical or chemical change:
1) A candle melting - physical change
2) chopping wood - physical change
3) Fire burning - chemical change
4) dissolving salt in water - physical change
5) mixing baking soda and vinegar to make CO2 -- chemical change
What is the difference between evaporation and boiling?
Evaporation occurs below boiling point only on the surface of the liquid.
boiling occurs throughout liquid