Mixtures Pure substance : It is the substance that is made of only one type of identical particles. Mixture : It is the substance that consists of more than one type of particles.

1. Lesson 1
Mixtures

2. What is the difference between this
photos ?

3. Matter
Pure
Substance
Mixture
Can be

5. EXAMPLES :
Distilled water Sugar Gold

6. more than one
type

7. EXAMPLES :
Milk

8. Mixtures is divided into two types
which are :

9. Homogeneous Mixture :
• Milk • Mixture of salt and
water
A type of mixtures in which, we cannot distinguish
between it’s components.
Examples:

10. Heterogeneous Mixture :
• Vegetable Salad.
A type of mixture in which, we can distinguish between
its components.
Examples:
• Mixture of sand and
water

11. You will be showen a series of photos.
Tell if each photo represents an item composed of
pure substance or mixture.
Copper

12. Tomato

13. Milk

14. Vegetable salad

15. Tea

16. Silver

18. Formation of mixtures:
Mixture can be formed by different
methods such as :
1-Stirring. 2-Shaking. 3-Grinding

19. Evaluation :
Question
Complete the following :
1.Sugar and water can be mixed by ………. Or
………….
2.Sand and salt can be mixed by ………….. Or
………….
3.………….. Or shaking is a method to form liquid
mixtures .

20. Write the scientific term :
1- substances that are made up of only one type of
identical particles .
2- substances that are made up of more than one type of
particles .
Complete :
1- The substances may be ………………. Or …………………
2- The mixtures are classified into ………… & …………..

21. Next session
Separation of mixtures
H.W
P. 8

22. Activity
• To show how you can make a mixture.
• Tools :
Conical flask with a lid – water – oil – sand – salt .
Steps:
1- Add an amount of salt to an amount of water
in the flask.
2- put the lid on the flask and shake it gently,
then wait a minute.

23. Observation:
• Salt dissolves in water and disappears forming
salty solution which can’t be affected by time .
• On shaking ,they interfere in each other , then
oil separates from water by time.
• On shaking they seem to be mixed together ,
but by time sand precipitates.

24. Types of mixtures
There are many types of mixtures, but we mention some
of them only:
Gaseous-
gaseous mixture
Gaseous-liquid
mixture
Liquid- liquid
mixture
Solid- liquid
mixture
Solid-solid
mixture
Types of Mixtures as:

25. Thanks