science 5 ppt.. power point presentation for education

presentation for demo

1. Diana B elo Teacher 1

2. Science 5 Q-4 w-1

3. WEATHERING

4. Describe how rocks turn into soil Melcs

5. HTREA EARTH

6. ROCKS KCOSR

7. PLANT TLANP

8. WATER RTWAE

9. Video Presentation.:

10. Picture presentation: Observe the picture below and answer the following question 1. What are the pictures all about? 2. What is the difference of two pictures shown on the screen? 3.What are the pictures trying to convey?

11. Earth is mainly composed of rocks that differ in terms of sizes, shapes, and colors. Though rocks seem to be very hard, dense, and indestructible, they still break. Rocks are broken down into smaller pieces by the effects of weather. These pieces do not move to a new location, they simply breakdown but remain next to one another

12. Weathering is an important process that helps shape the Earth’s surface. The breaking of rocks result in the formation of soil and different landforms. This is also the reason why we have amazing rock formation. The breaking of rocks into fragments is known as weathering

13. Weathering can either be mechanical or chemical. Mechanical weathering away of rocks without ang change in their chemical nature Chemical weathering involves change in the composition of rocks that allows them to break down into pieces.

14. Water can break rocks in different ways. The strong waves that seep into the cracks of rocks can make them break. When it gets colder, these water can expand and turn into ice which can trigger rocks to break as well Agents of Weathering

15. Wind is another agent of weathering that causes beautiful formations like the Mahayaw arch in Sabtang Island, Batanes, Philippines. As the wind blows, it carries sand or small rock particles that scratch the rocks’ surface. This can bring about mechanical weathering which can also result to different rock formation. Agents of Weathering

16. Temperature When rocks are exposed to varying temperature, it expands. If rocks are exposed to a low temperature, it contracts. The repeated expansion and contraction of rocks due to changes in temperature results in weathering Agents of Weathering

17. Plants Some plants, like lichens, ferns, and mosses, can also trigger weathering. It can grow on rocks and cause them to break into pieces. Eventually metabolic or life process of these plants will cause the gradual breakage of rocks into smaller pieces. Agents of Weathering

18. Animals Animals that live underground also contribute to weathering. As burrowing animals dig deeper, they cause rocks to break into pieces. Agents of Weathering

19. Humans Humans also contribute to the weathering of rocks. Subdivision developers use bulldozer to flatten mountains or hills to build houses. Some construction workers use jackhammer to break boulders of rocks as they repair roads. Mining companies extract stones or rocks from a quarry or an open-pit mine. Some miners throw dynamites and other explosive on quarry sites to get more rocks or stone which can trigger landslides. Agents of Weathering

20. Discussion: MATCHING TYPE. Below are some pictures of rocks formation. Identify the pictures below whether it is cause by Mechanical Weathering or Chemical Weathering CHEMICAL WEATHERING CHEMICAL WEATHERING MECHANICAL WEATHERING MECHANICAL WEATHERING CHEMICAL WEATHERING

21. Describe rocks turn into soil in the following pictures below. Type your description on the space provided beside each picture . Ferns grow on rocks and cause them to break into pieces When miners throw dynamites and other explosives on quarry sites to get more rocks or stone the strong waves that seep into cracks of rocks can make them break, when it gets colder, these water can expand and turn into ice which can trigger rocks to break as well.

22. Group activity Group yourselves into 3 groups. The activity that you are going to perform will clearly explain weathering through communicating the data collected from the investigation on the soil erosion. Every group has only 20 minutes to complete the task. Your points will be determined using rubrics. Prepare the materials listed below. If not available, you may use other materials to perform the activity. Title: Erosion By Water Materials: 2 small pans 6 cups of garden soil 2 bottles of 500 ml water Procedures: 1. Get 2 small pans and fill them with garden soil. Label one pan as A and the other as B. 2.Pour water gradually in the soil on the first pan. What happened to the soil? Describe the movement of the soil. 3.Repeat procedure number 2 on the second pan. This time pour the water rapidly into the soil. What happened? Compare the difference in terms of the movement of the soil from the first one. 4. Record the time and measure your observations.

23. Based on your observation, in which setup did the soil move faster? Why? Based on your observation, in which setup did the soil move farther? Why? Based on your observation, which set up moved more soil? Why? As you observed, what happened to the color of the water? Based on the data collected in the experiment, what can you include about soil erosion? Questions

24. Identify the change happening in each situation. On the number, draw a red if the change is an example of mechanical weathering and green if it is an example of chemical weathering. ______A boulder of shore is slowly broken apart by the of water. ______Earthworm makes tunnels in the ground which may lead to breakdown of stones and rocks. ______Minerals is rock dissolve. ______Some plants release which loosen the rocks and cause them to break ______Tree roots can grow into cracks and break rock apart.

25. Assignment :

26. THANK YOU Prepared by: DIANA BELO