Lesson-2-Diversity-of-Materials-in-the-Environment.pptx

MATTER SOLUTIONS AND MIXTURES

1. Grade 7

2. Prayer Father God Come be with us today Fill our hearts with joy Fill our minds with learning Fill our lesson with fun Fill our friendship with kindness Fill our school with love AMEN.

3. Checking of Attendance

4. What are the steps of scientific method?

5. Diversity of materials in the environment

6. And also those things you can’t see like gases rocks p ieces of wood liquids Is filled with different kinds of materials that you can see.

7. MATTER What is matter? -it is anything that occupies space and has a mass

8. Because of an abundance form of matter, how can you distinguish one from another?

9. Characteristics Properties Uses

10. Substance and Mixtures

11. Pure substances- always have the same composition

12. Elements- element  is a pure substance which cannot be broken down by chemical means,

13. Elements are also referred to as the building blocks of matter because when they react with one another, they form compounds.

14. Compounds- element  is a pure substance which cannot be broken down by chemical means, Water - Formula: H 2 O =  Hydrogen 2  + Oxygen Hydrogen  Peroxide – Formula: H 2 O 2  =  Hydrogen 2  + Oxygen 2   Salt – Formula: NaCl =  Sodium  + Chlorine Baking Soda  - : NaHCO 3  =  Sodium  +  Hydrogen  + Carbon + Oxygen 3  

15. MIXTURE Plays an important role in the daily activities of people.

16. Mixture of several gases The gasoline that runs machines contains about 12 to 200 different substance

17. MIXTURE

18. Mixture- is a substance with a variable composition formed when two or more substances mix together

19. Heterogenous-   The  heterogeneous mixture  has a non-uniform composition and has two or more phases. ... It can be separated out physically .

20. Suspension- is a type of heterogenous mixture that is made up of suspended solid particles that settle to the bottom of suspensions container.

21. Homogenous- A  homogeneous  mixture is a mixture in which the composition is uniform throughout the mixture .  

22. Homogenous- can be a solutions and colloids solutions

23. Colloids

24. Book activity Answer follow up 41-42

25. All about Elements

26. In  1680  Robert Boyle also discovered phosphorus, and it became public. In  1809  at least 47 elements were discovered, and scientists began to see patterns in the characteristics.

27. In  1869  Russian chemist  Dimitri Mendeleev  started the development of the  periodic table ,

28. HOW MANY ELEMENTS ARE THERE IN PERIODIC TABLE? 118 Elements

29. METALS 91 metals Shiny and has a certain luster Except for mercury, metals are solid at room temperature. Good conductors of heat and electricity Ductile- drawn into thin wires Malleable- it can be easily hammered into sheets

30. Luster, heat, and electrical conductivity, ductility, and malleability are the main physical properties of most metals. Physical Property Is a characteristic that can be observed or measured without changing the identity or composition of the material

31. NON METALS Gas or brittle Solid No luster Poor Conductors of heat and electricity Brittle and easily be crushed

32. These materials are made of carbon , oxygen , sulfur, and other nonmetals.

33. Metalloids Has a properties that are intermediate between those of metals and non metals. For example, metalloids conduct electricity only partially.

34. Book activity Follow up page 49.

35. Heterogenous

36. Homogenous

37. Pure substances

38. Nonmetals

39. Metals

40. Metalloids

41. Mixture