Week 2: Module 1 - Matter
No
Are mass and weight the same thing?
Chemical
Examples of _________ Changes in Matter: 1. Souring of milk 2. Rusting of iron 3. Burning of wood 4. Cremation of remains 5. Decomposition of remains 6. Embalming or preservation of remains
Physical
Examples of ____________ Changes in Matter: 1. Chopping wood 2. Breaking glass 3. Boiling 4. Melting 5. Freezing 6. Condensation 7. Evaporation 8. Solvation, also known as dissolving 9. Tearing up a piece of paper
COMBINING REQUIREMENTS
For example, whether an element or compound requires either ordinary or elevated temperatures to combine with another element or compound.
mass; weight
If you go to the Moon, your _______ will not change, but your _______ will be less because of the decrease in gravity.
False - Weight depends on the pull of gravity
MASS AND WEIGHT ARE NOT THE SAME THING. MASS DEPENDS ON THE PULL OF GRAVITY. (T/F)
Density
Mass/Volume equals
True
Matter can undergo both physical and chemical changes. (T/F)
example of PHYSICAL CHANGE IN MATTER
No new substances are formed, only the state has changed. For example, when water boils, it simply changes its physical state from liquid water to gaseous water (steam). It is still water. No new substance is formed.
Luster
SHININESS
physical properties
Some examples of ___________ properties include: COLOR ODOR TASTE HARDNESS SHAPE MASS LENGTH LUSTER PHYSICAL STATE MELTING POINT FREEZING POINT BOILING POINT SOLUBILITY VISCOSITY CONDUCTIVITY HYGROSCOPICITY DENSITY
chemical
Some examples of ___________ properties include: Reactivity Combustibility Valence Combining Requirements Stability
HYGROSCOPICITY
THE ABILITY OF A SUBSTANCE TO ABSORB WATER IS _____________.
stability
The stability of an element or compound towards heat, light and shock.
Physical Properties of Matter
These are characteristics that can be recognized by our senses.
Properties of matter
They are the characteristics by which substances may be identified; how we recognize matter
COMBUSTIBILITY
WHICH OF THE FOLLOWING IS NOT A PHYSICAL PROPERTY OF MATTER? VISCOSITY ODOR FREEZING POINT COMBUSTIBILITY
SUBLIMATION OF DRY ICE
WHICH OF THE FOLLOWING IS NOT AN EXAMPLE OF A CHEMICAL CHANGE? SUBLIMATION OF DRY ICE RUSTING OF IRON SOURING OF MILK CREMATION OF REMAINS
If so, then the change was a chemical change. If you still have the same substance, only in a different state of matter (solid, liquid, or gas), then the change was a physical change.
When deciding if a change is physical or chemical, ask yourself... is a new substance, with a whole new set of physical properties, formed by the change?
MATTER
______________ IS DEFINED AS ANYTHING THAT HAS MASS AND TAKES UP SPACE.
PHYSICAL CHANGE IN MATTER
a change in the form or state of matter without any change in the identity or chemical makeup (composition) of a substance.
Physical Properties of Matter
characteristics that can be observed without altering its chemical composition (destroying the substance).
VALENCE
deals with electrons in the outer shell of an atom and determines an element's combining capacity when forming chemical compounds
Matter
defined as anything that has mass and occupies space
Weight
depends on the pull of gravity.
Physical Properties of Matter
describe the physical characteristics of a substance and NOT how the substance behaves chemically.
Chemical properties
have to do with the activity of the substance in a reaction; the ease or difficulty with which matter enters into a chemical change.
mass
he quantity of matter in an object
conductivity
is a measure of the ability of an electric current or heat to flow through a substance.
HYGROSCOPICITY
is the ability of a substance to absorb water.
COMBUSTIBILITY
is the ability of a substance to burn. In burning, this reaction takes place where the substance reacts with oxygen to burn, forming a new substance.
solubility
is the ability of a substance to dissolve
melting point
is the point (temperature) at which a substance melts
boiling point
is the point (temperature) at which something boils.
freezing point
is the point (temperature) at which something will freeze
viscosity
is the resistance of a liquid to flow or can be described as the thickness of a liquid.
Matter
may exist as a solid, liquid or gas
CHEMICAL CHANGE IN MATTER
occurs when substances lose their identity as they undergo a chemical reaction and the new substance(s) formed have different physical and chemical properties than those of the original substance.
PHYSICAL CHANGE IN MATTER
only a change in physical properties. At the end of the change, the original substance still has the same chemical properties as it had at the beginning of the process.
Density
refers to the mass of a substance divided by its volume.
REACTIVITY
refers to the rate (time) in which a chemical substance undergoes a chemical reaction. In pure compounds, it is regulated by the physical properties of the sample.
CHEMICAL CHANGE IN MATTER
results in the formation of a new substance.
physical states
solid, liquid, gas are examples of:
LAW OF CONSERVATION OF MASS
states that in any chemical or physical change, mass is neither created nor destroyed but merely changed in form.
Chemical properties
the characteristics seen when a substance is interacting with other substances resulting in a change of chemical composition.
Weight
the measure of the gravitational pull on an object
specific gravity
the ratio of the density of a substance divided by the density of a standard. The standard used is water. Therefore, the _______________ of a substance is a comparison of a substance's density to that of water.
Properties of matter
those characteristics by which matter or substances are described for purposes of recognition and differentiation.
Chemical Properties of Matter
those characteristics of matter seen only when matter has undergone a chemical change or reaction. That chemical change/reaction altered the composition of the matter, forming new substance(s) with new physical and chemical properties.
Physical & Chemical
two types of properties of matter: