BELL WORK:
- Describe below the properties that could be used to describe an apple. Try to come up with a property for each of the five senses.
- Which of your senses do you tend to rely on the most in observing the world around you? Why?
- Which of your senses do you tend to rely on the least in observing the world around you? Why?
KEY IDEAS:
•Distinguish between the physical properties and chemical properties of matter.
•Classify changes of matter as physical or chemical.
•Explain the gas, liquid, and solid states in terms of particles.
NOTES:
What is Matter?
Matter is anything that has mass and ______.
Mass is the amount of ______a substance has in it.
Volume is the amount of ______a substance takes up.
I Say Again What is Matter?
Matter is made of ______.
Atoms are the smallest ______of matter.
Atoms are similar to cells in organisms. Cells are the smallest unit of living things that still carry out life ______. Atoms are made of smaller things but they do not act as atoms do. Also like cells one type of atom can ______from another.
______are a pure substance made of only one kind of atoms.
______are two or more elements bonded together.
______are two or more atoms bonded together.
Extensive vs. Intensive
______Properties are those that depend on the amount of matter in the substance.
Examples: Mass, ______
______Properties are those that do not depend on the amount of the substance.
Examples: ______, Melting Point, Boiling Point
Physical Properties and Changes
A ______property is a characteristic that can be observed or measured without changing the substance.
Examples: ______, Melting Point
A physical change is when the substance changes, but does not become a ______substance.
Examples: Change in State, ______Up
States of Matter
A ______has definite shape and volume.
A ______has a definite volume, but a changing shape.
A ______has neither a definite shape or volume.
A ______is a high temperature state in which atoms are stripped of electrons. The most common state. (Stars)
Chemical Properties and Changes
A ______Property relates to a substance’s ability to undergo changes that trans form it into a new substance.
Examples: Oil/Water, ______
A Chemical Change is a change in which one or more substances are changed into ______substance. Also known as a chemical ______.
Chemical Reactions
Reactants are the substances that we ______with in a reaction. They are before the arrow. (H2, O2)
Products are the new substances that we ______with in a reaction. They are after the arrow. (H2O)
Energy and Changes
It is important to remember that any change physical or chemical ______a change in energy to accomplish.
Energy can be in various forms.
______
______
Energy can be absorbed or released in a ______, it is not destroyed or created.
Law of ______of Energy
Classifying Matter
Matter falls into two major groups: pure or ______.
A pure substance has a fixed composition that differs from mixtures in that:
Every sample has exactly the same ______.
Every sample also has the same ______.
A mixture is two or more pure substances combined together while still keeping their own properties. They have not changed ______.
Types of Mixtures
______Mixtures have a uniform composition. (evenly mixed)
Homogeneous Mixtures are also called solutions. Solutions are not only ______.
______Mixtures are not a uniform composition. (unevenly mixed)
REFLECTION:
- The last few slides dealt with purity of substances. Why might the purity of a substance cause problems in a laboratory or industrial setting?
- Complete the chart below in light of the vocabulary discussed in the lecture and this section of the textbook.