Show:
Matter
Properties of Matter
Mixtures and Solutions
Physical and Chemical Changes
More About Matter
100
this is used to find a liquids volume
What is a graduated cylinder used for?
100
objects float if they are less dense than water
What is the reason some objects float?
100
add water to the mixture to separate it
What is the best way to separate a mixture of salt and pepper?
100
a raindrop freezes to form sleet
What is an example of a physical change?
100
a compound
What is formed when two or more elements join together?
200
in combination with other elements
What is how are elements usually found in nature?
200
a measure of the amount of matter in a given volume
What is density?
200
stir the solution
What is a way to dissolve a solute quickly?
200
a ship's iron wheel rusts
What is an example of a chemical change?
300
properties
What is ways we used to identify other types of matter?
300
divide the objects mass by its volume
What is a way to find an object density?
300
use a magnet to separate out the iron
What is the best way to separate a mixture of iron fillings and sand?
300
combustion is a chemical change in which a substance gives off energy
What describes combustion?
300
there are two atom of hydrogen in each molecule
What is the formula for water H2O, what does the "2" tell you?
400
an atom
What is the smallest particle of an element that still has its properties?
400
they all have similar chemical properties
What is the way elements are arranged on the periodic table of elements?
400
ice melts and becomes liquid water
What happens when ices rises in the temperature to 0 Celcius and more heat is added?
400
the metal changes color
What is a chemical change when silver tarnishes?
400
a molecule is made of two or more atoms
What is the difference between an atom and a molecule?
500
it has a negative charge in the atom
What is an electron?
500
the particles of a substance can flow past one another
What is a way to describe the liquid phase of matter?
500
they can be used to identify an unknown substance
What is the freezing and boiling point used for?
500
a chemical change
What is it called when atoms in a substance rearrange themselves to form different kinds of matter?
500
Law of Conservation of Mass
What is a law that says that matter cannot be created or destroyed during a chemical reaction?