What is the simplest kind of substance?
(It can't be broken into anything simpler.)
An element
100
What is a combination of two or more things that keep their properties?
a mixture
100
A chemical reaction occurs when you start with one or more substances and end up with a new substance. The substances before the change are reactants. What is the new substance called?
a product
100
What is a substance that is a good conductor of heat and electricity?
metal
200
What are the three states of matter?
solid, liquid, and gas
200
What is the smallest particle that makes up an element?
an atom
200
What type of mixture separates into layers when the particles are allowed to settle?
suspension
200
What is the product of combining one carbon atom and two oxygen atoms?
(Please give me the name, not the symbol.)
carbon dioxide
200
What allows heat and electricity to flow through it?
a conductor
300
What is the amount of matter an object has?
mass
300
What is the symbol for water?
Example: CO2 is the symbol for carbon dioxide
H2O
300
All solutions have one part that dissolves another part. Which part of the solution gets dissolved?
the solute
300
To tell how reactive a metal is, look at any column of the metals in the periodic table. Metals become _________reactive as you go down a group.
more
300
What is the common name for this compound?
NaCl
salt
400
What is the space an object takes up?
volume
400
What are the three properties of elements?
(This is how they are color coded on the Periodic Table)
metals, nonmetals, and metalloids
400
Rust is created when oxygen and iron combine. This is a change in matter that produces substances different from the substances you started with. What is this change in matter called?
a chemical change
400
Name three signs of a chemical change.
Possible answers:
1. forms a solid
2. forms a gas
3. temperature changes
4. releases light
5. color changes
6. forms tarnish
400
What do we classify a rating on the pH scale of 7?
neutral
500
What is the freezing point of water?
(Degrees Fahrenheight)
32 degrees Fahrenheight
500
How are the elements arranged on the Periodic Table?
by their atomic number
500
Which three elements combine to make up a the sugar molecule C6H12O6?
carbon, hydrogen, and oxygen
500
Name this reaction in nature:
Water + carbon dioxide ----> sugar + oxygen