Mixture/Changes in State
What is a mixture?
A blend of two or more substances
What is energy?
Energy is the capacity to do work or to produce heat?
Matter is anything that has mass and volume.
Name the three scales used for temperature measurement
Celsius, Fahrenheit, Kelvin
What is an element?
A substance that cannot be seperated into simpler substances by a chemical change.
What is different between a hetero and homogeneous mixture?
Hetero was visible different parts to it, Homogeneous do not contain visible different parts
Name the two types of energy
Kinetic and Potential
Like energy, is neither destroyed nor created in any process.
What is the SI unit for Temperature?
Kelvin (K)
What is a compound? Give an example
Two or more elements combined by a chemical reaction.
What is it called when a liquid goes to gas?
Evaporation
What is a common unit used for energy?
calorie (cal)
What are the four states of matter?
Solid, Liquid, Gas, Plasma
I have a temperature of 142 C, what is it in Kelvin?
415 K, K= C + 273
Cesium
What is it called when a solid becomes a liquid?
Melting
What is the law of conservation of energy?
Is burning a log a chemical or physical change?
Chemical
761 C
Why are elements and compounds considered pure substances?
Every pure substance has a unique set of chemical and physical processes.
Gas to Solid is called?
Deposition
Joules
What is it called when a solid goes to a gas?
Sublimation
What point on the Kelvin scale corresponds to -273 C, what is this point called?
What element is AlO, is this a compound or element?
Aluminum Oxide, compound