Matter 5 Flashcards
What is a substance that has mass, takes up space, and can exist as a solid, liquid, or gas?
matter
How many elements are known on Earth?
109
Where are all of the elements known on Earth listed?
Periodic Table
When elements combine chemically they form __________.
compounds
When you mix baking soda and vinegar you know a chemical change has occured because ___________.
a new gas is produced
You can see that a chemical change has occured when a tomato ripens because __________.
there is a color change
Each element is made of only one kind of __________.
atom
What type of mixture do you get when salt crystals dissolve in water?
a solution
What would a bowl filled with different types of candy be?
a mixture
A solid can change to a liquid and a liquid can change to a gas when matter is __________.
heated
Liquids can be changed to a solid and gases can be changed to liquids when matter is __________.
cooled
What are changes that occur in mixtures and solutions called?
Physical
When chalk is written CaCO3, what is this called?
a chemical formula
What is formed when atoms are grouped with other atoms
molecules
What does a chemical formula tell you?
The number and kind of each atom in a compound.
