Vocab
This is a substance made of just ONE kind of matter.
What is an element?
This is a change that begins and ends with the SAME type of matter.
What is a physical change?
This is how a substance interacts with other substances.
What is a chemical property?
This is how a solution of salt water can be separated into two parts.
What is evaporation?
The is the smallest possible particle of one kind of matter.
What is an atom?
This is a change from liquid to gas.
What is evaporation or boiling?
These are two common properties of metals.
What are shiny and and able to be stretched?
A substance is heated until it melts over a flame. It is then taken off and left to the side to rest. What might happen to the substance.
It will freeze back to a solid it cools down to its freezing point.
This is a trait of a substance by itself.
What is a physical property?
Crushing stone into gravel is an example of this type of change.
What is a physical change?
These are three examples of physical properties?
What are color, odor, hardness, luster (how shiny), boiling, and melting point.
By separating out the original parts, we prove that they have not changed into something new. If they had changed, they would not be there to separate.
This physical change happens when a substance changes state
What is a change of state?
What are the three ways that matter can change physically?
What are 1. change in size or shape 2. change in texture or position 3. change in state?
These are two common properties of non-metals.
What are brittle and dull?
Why is iron an element, but not steel?
Iron is made up of iron atoms, while steel is iron mixed together with carbon.
This is a substance made of two or more kinds of atoms that are chemically combined.
What is a compound?
These are some signs that a chemical change has taken place.
What is color change, a new smell, a new physical property, a substance give off (smoke, bubbles), heat given off.
This chemical property is shown by leaving iron in water.
What is reacting with oxygen to form rust?
A box of nails is stored in a box is not rusted, while another box stored in the basement has rusted. Why might that have happened?
The nails in the basement might have been exposed to water, while the others were not.