1. Riddle MATTER It can be anything, and it makes up everything.
But it always takes up space and has mass.
What it is?
MATTER

2. Matter and Its Changes
Chapter 2.1
Chemistry 1.1

3. Chemistry: Definition
The study of properties of matter and how it changes

4. What is Matter?
Anything that:
Has Mass
Takes up Space (volume)

5. Building Blocks of Matter
Elements: Cannot be broken down into any other substance by physical means
All matter around you is composed of one element or a combination of elements

6. Building Blocks of Matter - 2
Molecule: 2 or more atoms chemically bonded together, making a new substance
Compound: A molecule made of 2 or more elements, making a new substance

7. Building Blocks of Matter - 3
Mixture: 2 or more substances mixed by not bonded to make a new substance
Solution: a well mixed mixture in liquid form (salt water)

8. Mixing Liquids Miscible Immiscible
two liquids that dissolve in each other. They mix to form a solution
Immiscible
Two liquids that don’t mix and stay mixed. They may make a suspension, but they don’t make a solution

9. Changes in Matter - 1
Physical Change: change in form or appearance that does not change the actual substance (ice to water to steam)

10. Changes in Matter - 2
Chemical Change: substances mix to form new substances with different properties

11. Observing Chemical Reactions
Key Characteristic: production of new materials that are chemically different from the starting materials
Gas released
Temperature change
New solid material
Smell
etc

12. Chemical Reactions on a Small Scale
ONE (1) particle of an element is an ATOM
Molecule – 2 or more atoms combined

13. Chemical Reactions on a Small Scale
Chemical BONDS are the ‘glue’ that holds atoms together
Chemical REACTIONS occur when chemical bonds are formed or broken.

14. Section 1.1 Review Questions
1. How are element, compound, mixture different?
Element cannot be broken down.
Compound is two or more elements combined chemically.
Mixture is 2 or more items that can be physically separated

15. Section 1.1 Review Questions
2. What forms of evidence show a chemical reaction has take place?
New substances are formed, can be seen by color, precipitation, gas released, temperature changes, changes in properties.
3. What happens to chemical bonds in a chemical reaction?
Bonds are broken or new bonds may form

16. Section 1.1 Review Questions
4. What is difference between atom and molecule?
Atom is smallest particle of an element. Molecule is combination of 2 or more atoms
Ice cream melting is physical.
Sugar dissolving is physical
Gasoline burning is chemical
mirror fogging is physical
milk souring is chemical
5. Classify changes: for
Ice cream, sugar, gasoline, mirror, milk