Chemistry Reading #1 Flashcards
What does chemistry describe?
How matters changes
What’s an example of a physical change?
Ice melting
What’s an example of a chemical change?
Iron turning to rust
What is a physical property?
A property you can measure with tools or your senses.
What does malleable mean?
Property meaning it can be bent into a shape without breaking.
What does brittle mean?
The opposite of malleable. Brittle materials like glass break instead of bending.
What does ductile mean?
Property meaning it can be stretched into a thin wire without breaking.
What is physical change?
A change that occurs when there is a change in the physical properties of matter. (can be reversed without changing the chemical identity of a substance)
What is volume?
A physical property of matter.
What must happen in order for it not to be classified as a physical change?
It must become a different compound.
What is a chemical change?
A chemical reaction occurs and Atoms are rearranged to make a new substance. Energy is either given off or absorbed.
What is a chemical property?
A property that can be observed when a substance is transformed into a different substance.
What is a chemical reaction?
Any process in which one substance changes into a different substance.`
What is reactivity?
The ability of a substance to undergo a chemical change and become rearranged into a different substance.
What are some signs of a chemical change?
Color change, bubble formation, odor change, precipitate formation, energy change
