1. Mrs. Oulton Birt
Grade 9 Science

2. Chemistry is the study of matter
What is Chemistry?
Chemistry is the study of matter

3. Chemisty is the study of :
the properties of matter,
the changes that matter can undergo,
and the laws that describe these changes.
Chemists study different materials to learn their properties and discover their uses.

5. CHEMISTRY…
IS THIS WHAT YOU THINK?

6. Chemistry is Life!

7. What is Matter?
Matter is anything that has mass and takes up space!

8. Properties of Matter
Properties are characteristics that are used to identify and describe objects.
There are two general properties of matter:
Physical properties
Chemical properties

9. PHYSICAL PROPERTIES

10. Physical Properties A physical property is description of a substance
A physical property does NOT involve a substance becoming a new substance

11. Physical Properties Observed with Senses
Property
Describing the Property
Colour
Is it black, white, colourless, red, blue, greenish-yellow...?
Texture
Is it fine, coarse, smooth, gritty...?
Odour
Is it odourless, spicy, sharp, burnt...?
Lustre
Is it shiny, dull...?
Clarity
Is it clear, cloudy, opaque...?
Taste
Is it sweet, sour, salty, bitter...?

12. Types of Physical Properties
State of matter
Hardness
Malleability
Ductility
Melting and Boiling Points
Crystal Form
Solubility
Viscosity
Density

13. Hardness
A measure of the resistance of a solid to being scratched

14. Malleability
The ability for a solid to be bent into different shapes

15. Ductility
The ability for a solid to be pulled into wires

16. Melting and Boiling Points
The temperature at which a substance changes state

17. Crystal Form
Solids that have a definite structure of cubes or blocks with a regular pattern
Himalayan salt is a marketing term forrock salt from Pakistan, which began being sold by various companies in Europe, North America, and Australia in the early 21st century. It is mined in the Khewra Salt Mines, the second largest salt mine in the world, located in Khewra, Jhelum District, Punjab, Pakistan, about 300 km from the Himalayas, about 160 kilometres from Islamabad, and 260 kilometres from Lahore, and in the foothills of the Salt Range.

18. Solubility
The ability of a substance to dissolve in a solvent

19. Viscosity
Refers to how easily a liquid flows: the thicker the liquid, the more viscous it is

20. Density The amount of matter per unit volume of that matter
Mass per volume

21. CHEMCIAL PROPERTIES

22. Chemical Properties
Chemical property describes the behaviour of a substance as it becomes a new substance.
Two types of chemical properties:
Combustible/Flammable
Reaction with Acid

23. Combustibility
Combustibility describes the ability of a substance to react with oxygen to produce carbon dioxide, water, and energy
If a substance is combustible or flammable, it will burn when exposed to a flame
Something that is not is nonflammable

24. Reaction with Acid The ability of a substance to react with acid
May produce bubbles of gas and dissolving of metals

25. To do ….
Make sure you read section 1.2
Do numbers 1 and 3 page 19