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100
What Is An Atom ?
Building blocks of matter
- Protons, Electrons and Neutrons. Protons - positve charge; Electrons - negative charge and Neutrons - no charge.
100
What Is An Mixture ?
A combination of two or more substances that are not chemically combined
100
What Is An Physical Properties ?
Characteristics that can be observed without changing the identity of the substance
100
What Is Oxygen (O2) ?
element, tasteless, odorless, colorless gas essential for human respiration or breathing
100
What Is Temperature ?
A measure of how hot or cold something is.
200
What Is An Element ?
A substance that cannot be broken down into simpler substances
200
What Is An Solution?
A mixture that forms when one substance dissolves another.
200
What Is An Physical Change ?
A change in a substance that does not involve a change in the identity of the substance
- A change from solid to liquid to gas
200
What Is Carbon Dioxide (CO2)
gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation
200
What Is Conduction ?
The direct transfer of heat from one substance to another substance that it is touching.
300
What Is An Element ?
A substance that cannot be broken down into simpler substances
300
What Is An Solid ?
A state of matter that has a definite shape and a definite volume
300
What Is A Chemical Change ?
A change in matter that produces one or more new substances
300
What Is Density
mass/volume, how compact the atoms or molecules of a substance are found
300
What Is An Convection ?
The transfer of heat by the movement of a fluid
400
What Is An Pure Substance ?
A sample of matter, either a single element or a single compound, that has definite chemical and physical properties
400
What Is An Liquid ?
the state of matter that has a definite volume but not a definite shape
400
What Are Chemical Properties ?
Characteristics of a substance that determine how it will react with other substances.
400
What Is An Odor ?
physical property, smell
400
What Is Thermal Energy ?
The total energy of motion in the particles of a substance. All substances have thermal energy. Ice and hot water both have thermal energy.
500
What Is An Molecule ?
A group of atoms bonded together
500
What Is An Gas?
a form of matter that does not have a definite volume or shape
500
What is Water (H20)
compound, 2 hydrogen atoms and 1 oxygen atom
500
What Is Heat ?
The energy transferred between objects that are at different temperatures
500
What Is Sublimation ?
the process in which a solid changes directly into a gas