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ixvtynOkGVLiMdAgETzE

Study note

michaela

United States of America

DEFAULT (US)

DEFAULT

Biology

matter

Movement and forces

Representing motion

Matter
Matter: anything that occupies space and has mass
• Solids, liquids, and gases are the 3 states of matter
- takes both the
-flow & take the
Shape of a container
forms a flat or
slightly curved upper
Shape & volume
of its container
surface when acted
.
-rigid&posess
a definite
shape
·both liquids & upon by gravity,
solids volume
are nearly
independent of
pressure
in zero gravity, liquids
have a spherical shape
plasma is the fourth state of matter
-occurs in high temp. like the interiors of stars
- less dense than liquids or solids and do not have a fixed shape
or volume
- contain electrically charged particles that are able to move freely
- very conductive and highly responsive to external electric or magnetic fields
Mass and Weight
Mass
the measure of the amount of matter
in an object
• can be measured by measuring the
Force it takes to measure an object
or by using a balance to compare
Its mass to a standard mass
• is constant, does not change
Law of Conservation of Matter
• there is no change in the total
quantity of matter present when
matter converts from one type to
another (chemical change) or btwn
States (a physical change)
Weight
•the force that gravity exerts on an
object
• directly proportional to the mass of
the object
changes as the force of gravity changes Classification of Matter
Atoms and Molecules
• atom: smallest particle of an element that has the properties of that element
and can enter in a chemical combination.
·molecule: consists of two or more atoms joined by chemical bonds
·move as a unit
- may consist of two or more identical atoms (ex: the elements hydrogen, oxygen, and sulfur)
or may consist of two or more different atoms (ex: water)
Classifying Matter
matter is classified into 2 broad categories mixtures and pure substances
• pure substance: has a constant composition
- all pure substance specimens have exactly the same makeup & properties
Ex: all samples of sucrose (table sugar) have 42.1% of carbon, 6.5% hydrogen, & 51.4%. oxygen
by mass; additionally any sample has the same physical properties, such as melting point
Color, and sweetness, regardless of the source it was isolated from
pure substances can be divided into two classes compounds and elements
elements: pure substances that cannot be broken down into simpler substances by chemical
changes
compounds: pure substances that can be broken down by chemical changes
- the breakdown may produce either elements or other compounds
·both elements and compounds have a constant composition
Mixtures
• mixture composed of two or more types of matter that can be present in varying amounts
and can be separated by physical changes such as evaporation
• heterogenous mixture: a mixture that varies from point to point
Ex: Salad dressing
-Can be made w/ varying amounts of oil, vinegar, and herbs
- not the same from point throughout the mixture, one drop may be mostly vinegar while another
may be mostly all & herbs because the oil & vinegar separate and the herbs settle to the bottom homogeneous mixture aka solution, has a uniform composition and appears visually the same
throughout
Ex: Sports drink
- consists of water, sugar, coloring, flavoring, and electroyes mixed together uniformly
- each drop tastes the same because each drop contains the same amounts of its components
Physical Chemical Properties
·physical property: a characteristic of matter that is not associater with a change in its chemical
composition
Ex: density, color, hardness, melting & boiling points, and electrical conductivity
physical change: a change in the state or properties of matter without any change in its
Chemical composition
Ex: Wax melting, sugar dissolving in coffee
·chemical property: the change of one type of matter into another type or the inability to change
Ex: Flammability, toxicity, acidity, reactivity, and heat of combustion
-iron combines with oxygen in the presence of water to form rust
·chemical change always produces one or more types of matter that differ from the matter
present before the change
- used to identify a chemical property
Ex: the formation of rust is a chemical change because rust is a different kind of matter
than the Iron, oxygen, and water present before the rust formed
all forms of combustion (burning), reactions performed in a lab, food being cooked & digested
rotting

matter

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matter

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Can't find what you're looking for? Explore other subjects.

Knowunity is the # 1 ranked education app in five European countries

Knowunity was a featured story by Apple and has consistently topped the app store charts within the education category in Germany, Italy, Poland, Switzerland and United Kingdom. Join Knowunity today and help millions of students around the world.

4.9+

13 M

#1

950 K+

Still not sure? Look at what your fellow peers are saying...

I love this app so much [...] I recommend Knowunity to everyone!!! I went from a C to an A with it :D

The application is very simple and well designed. So far I have found what I was looking for :D

Love this App ❤️, I use it basically all the time whenever I'm studying