Classifying Matter
All the parts of a substance and its unique properties are called its?
What is composition.
The characteristics of a property that can be observed, or measured without changing the composition or identity is called?
What is physical properties.
The volume increases. (As the temperature increases the molecules expand)
Our lab report conclusions should always include: name 3 things
1) An introduction sentence to state what the experiment was.
2) a summary of your data 3) How you obtained the data. 4) Did it support your hypothesis. 5)the why or why not, and if not, what could have impacted it.
A famous example of colorful chemical change is?
What is the Statue Of Liberty.
A pure substance that cannot be broken down into a simpler substance and contains one atom.
What is an element.
Every substance has a unique temperature at which a solid can change to a liquid. We call this?
What is melting point.
1) Color Change
2)Production of Gas
3) Formation of a Solid (precipitate)
In the lab where we used oil, corn syrup, water, and alcohol what were we comparing?
We were comparing density of liquids and solids.
When you cut your hair, you are not changing the composition, just the size.
Give 3 examples of mixtures
What is sugar water, sweetened tea, the air we breathe, sand and water, salt water (anything that is mixed together but not chemically bonded, if it can be separated to the original molecules it's a mixture).
Malleability is an example of what type of property?
What is physical property. (a substance ability to be hammered, pressed or rolled without changing its chemical makeup).
A reversible physical change that occurs when a substance changes from one state of matter to another.
What is Phase Change. (an example is melting chocolate).
How does changing temperature affect the rate of diffusion?
The warmer the water the faster the diffusion. ( As energy of water increases or decreases the rate of diffusion does the same.)
The ration of a substance's mass to its volume is called?
What is Density.
What is water!
We can use this measurement to identify substances...
What is density. (Density is unique to each substance)
An example of sublimation?
What is dry ice. (sublimation is when a substance goes from solid to gas state without becoming a liquid first.
The theory that all states of matter are in constant motion regardless of their state is?
What is Kinetic Theory of Matter
The sun and star are examples of what type of matter found mostly in the Universe.
What is Plasma (pg 49)
How do we classify/ organize matter?
By how it behaves. (it allows us to group similar matter together)
The melting point of Aluminum?
What is 660 degrees Celsius. (chart on page 60)
Burning butter is considered what type of change?
What is a chemical change.
What caused the one copper wire to turn green in our changes of matter experiment?
Negative Ions in the solution attracted to the positive charge of the copper wire.
What is 118 (94 pure and 24 manmade)