life-in-estuary.pptx SCIENCE GRADE 5 QUARTER 2

life-in-estuary.pptx SCIENCE GRADE 5 QUARTER 2

1. SCIENCE 5 January 23, 2023

2. oBJECTIVE Describe estuaries and intertidal zones S5LT-IIh-8.8.3

3. Weather Report

4. Read each statement. Write true if the statement is correct and false if it is not. _____1. Human beings are living things. _____2. Non-living things can breathe. _____3. The water, air and sunlight are living things. _____4. Living things can grow, use energy and breathe. _____5. Non-living things have senses.

5. Have you been to Manila Bay? Have you visited Subic Bay? Have you toured the Underground River?

6. PALAWAN UNDERGOUND RIVER

7. Lingayen gulf in pangasinan

8. Subic bay

9. Manila bay

10. What is an estuary? An estuary is a place where freshwater mixes with saltwater.

11. What is an estuary? It is where river meets the sea

12. Estuaries come in all shapes and sizes. They can be called bays , inlets , lagoons , wetlands and swamps .

13. Estuaries are home to a rich biodiversity of plants and animals . Estuaries are sometimes referred to as ‘ nurseries of the seas ”

14. Some Living things in estuaries Fish Shellfish Lobsters Marine worms Reeds Seagrasses Mangroves Algae Phytoplankton z ooplankton

15. Visiting species in estuaries Birds to roost and feed Fish to spawn and use as nurseries

16. Water birds eat fish, crabs and other animals Mangroves trees also grow in tropical estuaries

17. mangroves Mangroves are woody, seed – bearing plants adapted for life in brackish water

18. Mangroves serve as feeding and nursery grounds and refuges to many fish species, migratory birds, and other marine organisms.

19. Mangroves have developed various mechanisms to cope with the problem of excess salt

20. Filtering it out through their roots Excreting it through special salt glands in the leaves Depositing the salt in older leaves and bark which then drop from here

21. Mangroves protect the coastline by creating a buffer from storms and reducing erosion

22. Estuaries are home to crabs and clams of many species because they find the salinity in the area to fit them best.

23. Estuaries also help during storms and flooding for they serve as exit points for flood.

24. Estuaries also help during storms and flooding for they serve as exit points for flood.

25. Estuaries are important because they filter sediments and pollutants from the river before the freshwater from the river enters the seas or oceans

26. Filter feeders are creatures that pull small bits of organic materials like plankton and larvae from the water as it moves past them.

27. Horseshoe crabs are one of the older inhabitants of coastal estuaries living happily and largely unchained for millions of years.

28. - Oysters cover the estuary floor in areas where they use they foot secretions to cement themselves to the substrate. - Oysters are rich food source for us and also food sources to many estuarine creatures. -The predatory snails, sponges and fish eat oysters

29. Estuaries are home to a rich biodiversity of plants and animals. They also play an important role in the life cycles of other organisms.

30. Factors that affect the living things thriving in an estuary Waves Salinity Temperature Amount of sunlight Type of soil

31. waves Refer to the movement of the surface of the water. These are strong forces that organisms in the estuaries must learn to live with.

32. waves Kelp which is a kind of algae, has strong roots that attach itself to rocks or mussels to keep it from being carried away by the waves.

33. salinity Refers to the amount of salt in water Mangroves and blue crabs have adjusted well to the constantly changing salinity of water due to the continuous flow of freshwater and saltwater through the estuary

34. salinity Since blue crabs can move, their life cycle begins from high salinity water moving upstream toward the river which has low salinity and where they grow as adult.

35. salinity Freshwater has almost no salt while ocean water has quite a bit.

36. Brackish water results from mixing of freshwater and saltwater.

37. Brackish water have low salinity than waters in the seas and oceans

38. temperature Refers to the hotness or coldness of water.

39. sunlight Since estuaries are shallow, it is also the best place for photosynthesis . Algae, seaweeds, grasses and other marine plants love the amount of sunlight they receive.

40. Type of soil The type of soil in estuaries differ depending on the strength of waves and kinds of rocks formed in the area. Some estuaries are full of rocks or sand or pebble or clay.

41. Type of soil Since nutrients are found in the soil, these types of soil have an effect on the kind of living organisms that live in the estuary.

42. Zones of the Estuaries

43. Supratidal zone Located towards the upland and receives moisture from waves.

44. Intertidal zone The area exposed to low tide, like rocky cliffs and beaches.

45. Subtidal zone Always submerged in water and can contain coral reefs and all sorts of marine life.

46. Intertidal zone An intertidal zone is the area between the high tide mark and the low tide mark. Also know as foreshore and sea shore It is the area where land and see meet

47. Splash zone It is the area starting near dry land, above the high tide mark and is kept damp through wave splash

48. Upper intertidal zone It is only covered by water when it is high tide so it experiences dry periods daily.

49. middle intertidal zone It is the zone that is regularly covered by water. The area between the average high tide and low tides lines on the shore

50. Lower intertidal zone The area that is usually submerged in water. This zone is dry only and exposed to air during the lowest tides

51. True or False 1. Salinity is the amount of freshwater in the estuary. 2. An Estuary is a wetland where river meets the sea. 3. When freshwater meets salt water of the sea, the result is brackish water 4. Temperature refers to the hotness or coldness of water. 5. Estuaries serve as exit points for floods.

52. Unscramble the letters to form a word which is being described . 1. TUESARISE - “nurseries of the sea” 2 . NIASIYT - amount of salt in water 3. DUALTRAPIS - located towards the upland and receives moisture from waves 4. PUREMEATTER - hotness or coldness of water 5. SEAWV - movement of the surface of water 6. LABDUTIS - zone that is always submerged in water 7. CITIOB - living factors in the environment 8. CIBOAT - non-living factors in the environment 9. DIALTTREIN - zone exposed only during low tide

53. Read each question carefully. Choose the letter of the correct answer. 1. An estuary is another kind of habitat. Which of the following describes an estuary? A. Land area that drains water into a lake, river or pond. B. Large body of saltwater that covers most of the Earth’s surface. C. Underground system that provides drinking water to an area. D. Area where a river meets the ocean, where in mixing of freshwater and saltwater happens

54. 2. Why are estuaries important to our environment? A. Provide homes for many species of wildlife. B. Are important nursery areas for a variety of marine organisms. C. Help filter pollutants in the water. D. All of the above

55. 3. Water is brought to an estuary from a variety of sources. Which of the following would contribute to an increase in the salinity of the estuary? Rivers B. streams C. urban runoff D. tides

56. 4. Based on how estuaries are formed, which of the following best describes the salinity (saltiness) of estuary water? A. Equal to the salinity of river water B. Less than the salinity of river water C. Less than the salinity of ocean water D. Greater than the salinity of ocean water

57. 5. Water in most estuaries is brackish because of the mixing of freshwater from rivers and saltwater from incoming tides. What would happen to the water in the bay if there is lack of water in the bay water shed? A. Increase salinity B. River meets the sea C. River becomes dammed D. Wet land becomes filled in