Properties of Matter
What properties describes how easily a substance dissolves in another substance?
Solubility
What happens to sugar particles when sugar dissolves in water?
The sugar particles spread throughout the water
A bicycle is left outside and begins to rust. What type of change occured?
Chemical change
During a physical change or chemical change, matter is ___________?
Conserved
What is an atom?
A tiny particle that makes up matter
What property tells how much matter is packed into a certain amount of space?
Sugar completely dissolves in warm water. Did the sugar disappear?
no, the sugar is still present in the solution
Name three signs that could provide evidence of a chemical change?
You combine 5 ounces of one material with 10 ounces of another. If nothing is lost, what should the mixture weigh?
15 ounces
What do we call matter made of only one type of atom?
an element
A scientist scratches an unknown rock to help identify it. What property is being tested?
Hardness
Ice melts into liquid water. Is this a physical or chemical change?
Physical change
What is a precipitate?
A solid formed from a chemical change
A 20 ounce substance melts completely. If nothing spills or evaporates, how much does it weight afterwards?
20 ounces
What is a bond?
A connection that holds atoms together
What property describes a materials ability to allow heat to pass through it?
Thermal Conductivity
A piece of paper is torn into smaller pieces. Is this a physical or chemical change?
Physical change
Why is burning wood considered a chemical change?
New substances with different properties are formed
What does matter is conserved mean?
Matter is not created or destroyed; the total amount remains the same
What forms when atoms join together through chemical bonds?
A molecule
A magnet attracts one object, but not another. What property is being tested?
Magnetism
What is the main difference between physical and chemical change?
A chemical change produces a new substance, a physical change does not
Which is a chemical change: cutting grass, melting plastic, or milk becoming sour?
Milk becoming sour
If matter changes from a liquid to a solid, does that automatically change the total amount of matter?
no
A water molecule is H2O. How many hydrogen atoms and oxygen atoms does it contain?
2 hydrogen atoms and 1 oxygen atom