1

ROCKSPowerpoint used in a Middle School demonstration lesson (science) presented by Anita L. Archer, PHD. A number of expository reading strategies were demonstrated including previewing and self-questioning.

2

3

4

5

6

classify

To classify things means to divide theminto groups or types so that things withsimilar characteristics are in the samegroup.

7

classifyclassifiesclassifyingclassifiedclassification

8

Before Reading - Previewing

Warm-UpBefore you read a chapter or a section of a chapter in your science, social studies, or healthbook, Warm-up. Get an idea of the chapter’s content by previewingthese parts.

BEGINNING– Title– IntroductionMIDDLE– Headings– SubheadingsEND– Summary– Questions Curriculum Associates, Skills for School Success

9

Self-Questioning Strategy

1. Read the heading.2. Form a question or questions.3. Read the section.4. Answer the question.

10

Classifying Rocks

Question Answer

11

Classifying Rocks

Question How do you classify rocks?

How are rocks classified?

Answer

12

Classifying Rocks

Question How do you classify rocks?

How are rocks classified?

AnswerRocks are classified by mineral composition, color, and texture.

13

How Rocks Form

Question AnswerIgneous rocks

Sedimentary rocks

Metamorphic rocks

14

How Rocks Form

Question AnswerIgneous rocksHow do igneous rocks form?

Sedimentary rocksHow do sedimentary rocks form?

Metamorphic rocksHow do metamorphic rocks form?

15

How Rocks Form

Question AnswerIgneous rocks Igneous rocks are formed when

magma or lava cools.Sedimentary rocks

Metamorphic rocks

16

Igneous Rocks

17

Basalt

18

Tuff

19

Pumice

20

Granite

21

Obsidian

22

How Rocks Form

Question AnswerIgneous rocksHow do igneous rocks form?

Sedimentary rocksHow do sedimentary rocks form?

Metamorphic rocksHow do metamorphic rocks form?

23

How Rocks Form

Question AnswerIgneous rocksHow do igneous rocks form?

Sedimentary rocksHow do sedimentary rocks form?

Sedimentary rocks are formed when rock particles and remains of plants and animals are pressed together.

Metamorphic rocksHow do metamorphic rocks form?

24

Sedimentary Rocks

25

coal

26

Conglomerate

27

limestone

28

shale

29

sandstone

30

How Rocks Form

Question AnswerIgneous rocksHow do igneous rocks form?

Sedimentary rocksHow do sedimentary rocks form?

Metamorphic rocksHow do metamorphic rocks form?

31

How Rocks Form

Question AnswerIgneous rocksHow do igneous rocks form?

Sedimentary rocksHow do sedimentary rocks form?

Metamorphic rocksHow do metamorphic rocks form?

Metamorphic rocks are formed when existing rock is changed by heat, pressure, or chemical reaction deep in the earth.

32

Metamorphic Rocks

33

amphibolite

34

Gneiss (nice)

35

Quartzite

36

Slate

37

schist

38

Texture

39

Texture

Question AnswerGrain size

Grain shape

Grain pattern