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BIOGEOCHEMICAL CYCLES 3-3

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Presentation on theme: "BIOGEOCHEMICAL CYCLES 3-3"— Presentation transcript:

1 BIOGEOCHEMICAL CYCLES 3-3

2 See a video clip about CYCLES IN NATURE - Chap 3

3 Energy is not the only thing that moves through the ecosystem. Atoms are never destroyed... only transformed. Take a deep breath. The atoms you just inhaled may have been inhaled by a dinosaur millions of years ago. ENERGY & MATTER

4 4 ATOMS make up 95% of the body in most organisms CARBON HYDROGEN OXYGEN NITROGEN The same molecules are passed around again and again within the biosphere in ___________________________ BIOGEOCHEMICAL CYCLES

5 WATER CYCLE = ___________________ HYDROLOGIC CYCLE

6 WHY IS WATER IMPORTANT? Makes up 60-70% of your body Oxygen and Hydrogen are found in all the ________________________: carbohydrates, proteins, nucleic acids, lipids Hydrogen in H 2 O supplies protons (H + ) & electrons for_______________ building blocks of cells photosynthesis

7 WHY IS WATER IMPORTANT? Water is a good _________________ Many molecules dissolve in water so it provides a place for chemical reactions to happen Water doesn’t change temperature easily so it helps with __________________ SOLVENT HOMEOSTASIS

8 WATER CYCLE evaporation condensation

9 The return of water to the surface in the form of rain, snow, sleet, hail, etc. = ____________________ The evaporation of water from the surface of plant leaves = ________________ TRANSPIRATION PRECIPITATION

10 PH ONLINE LINK Put in code: cbp-2033 Choose Start Image edited from: WATER CYCLE

11 CARBON CYCLE CO 2 in atmosphere CO 2 in ocean BIOLOGY; Miller and Levine; Prentice Hall; 2006

12 4 main CARBON reservoirs in BIOSPHERE CO 2 in atmosphere CO 2 in Ocean BIOLOGY; Miller and Levine; Prentice Hall; In ____________ as CO 2 gas 2.In _______ as dissolved CO 2 gas 3.On _______ in organisms, rocks, soil 4.__________ as coal & petroleum (fossil fuels) and calcium carbonate in rocks atmosphere ocean land Underground

13 Where does CO 2 in atmosphere come from? CO 2 in atmosphere CO 2 in Ocean BIOLOGY; Miller and Levine; Prentice Hall; ________________ 2.______________ 3._________________ 4.____________ of dead organisms Volcanic activity Human activity (burning fossil fuels) Cellular respiration Decomposition

14 WHY IS CARBON IMPORTANT? Found in all the _______________ of cells: carbohydrates, proteins, nucleic acids, lipids Image by Riedell BUILDING BLOCKS

15 WHY IS CARBON IMPORTANT? Carbon in CO 2 provides the atoms for __________ production during __________________... the fuel that all living things depend on. GLUCOSE PHOTOSYNTHESIS

16 N 2 in Atmosphere NH 3 NO 3 - and NO 2 - Section 3-3 NITROGEN CYCLE BIOLOGY; Miller and Levine; Prentice Hall; 2006

17 WHY IS NITROGEN IMPORTANT? Image by Riedell __________________make DNA and RNA Adenine (nitrogen base) is used in _______ Makes AMINO part of _________ (proteins) Image by Riedell NITROGEN BASES ATP amino acids

18 79% of the atmosphere is made up of NITROGEN gas (N 2 ) Image by Riedell BUT we _____ use the nitrogen gas we breathe! The bond in N 2 gas is so strong it can only be broken by _______________ ____________________ CAN’T lightning Volcanic activity few special bacteria

19 Bacteria that live ______________ and in _________ relationships with plants called _________, take nitrogen from the atmosphere and turn it into ______________, a form that is usable by plants. THIS PROCESS IS CALLED _________________ in the soil symbiotic legumes AMMONIA (NH 3 ) NITROGEN FIXATION

20 Image from: and modified by Riedell Other bacteria in the soil convert ammonia into ________________ & _________________ which plants can also use. The nitrogen we need for proteins, ATP, and nucleic acids comes from the ___________ ___________ we breathe! NITRATES (NO 3 - ) FOOD WE EAT NOT THE AIR & NITRITES (NO 2 - )

21 N 2 in Atmosphere NH 3 NO 3 - and NO 2 - Section 3-3 NITROGEN CYCLE BIOLOGY; Miller and Levine; Prentice Hall; 2006

22 Bacteria that live ______________ also carry out the reverse process ___________ → _____________. THIS PROCESS IS CALLED _________________ in the soil NITRATES & NITRITES NITROGEN GAS DENITRIFICATION

23 PHOSPHORUS CYCLE Weathering wears away rocks and sediments and releases phosphate into soil and water Image from: Pearson Education Inc; Publishing as Pearson Prentice Hall Producers absorb phosphate from soil and water Phosphate moves through food web Phosphate returns to soil and water from waste or decomposition Sediments form “new land” to complete cycle

24 Phosphorus cycle is only biogeochemical cycle that does NOT cycle through the ______________ BIOLOGY; Miller and Levine; Prentice Hall; 2006 atmosphere

25 WHY IS PHOSPHORUS IMPORTANT? Image by Riedell Makes DNA and RNA Transfers energy as ATP Makes phospholipids for cell membranes Image by Riedell

26 SOUTH DAKOTA CORE SCIENCE STANDARDS 9-12.L.3.1. Students are able to identify factors that can cause changes in stability of populations, communities, and ecosystems. Predict the results of biotic and abiotic interactions. Examples: Fluctuation in available resources (water, food, shelter) Biogeochemical cycles LIFE SCIENCE: Indicator 3: Analyze how organisms are linked to one another and the environment.

27 9-12.E.1.1. Students are able to explain how elements and compounds cycle between living and non-living systems. Diagram and describe the N, C, O and H 2 O cycles. Describe the importance of the N, C, O and H 2 O cycles to life on this planet. Examples: water cycle including evaporation, cloud formation, condensation. Indicator 1: Analyze the various structures and processes of the Earth system. SOUTH DAKOTA CORE EARTH SCIENCE STANDARDS

28 SOUTH DAKOTA ADVANCED SCIENCE STANDARDS 9-12.E.1.1.A Students are able to explain how elements and compounds cycle between living and non-living systems. Diagram and describe the P, S, and Ca cycles. EARTH SCIENCE: Indicator 1: Analyze the various structures and processes of the Earth system.

29 Core High School Earth Science Performance Descriptors High school students performing at the ADVANCED level: predict the effect of an interruption in a given cycles; predict how human activity may change the land, ocean, and atmosphere of Earth. High school students performing at the PROFICIENT level: explain how H 2 0, N, C, and O cycle between living and non-living systems; explain how human activity changes the land, ocean, and atmosphere of Earth. High school students performing at the BASIC level explain how H 2 0, N, C, and O cycle between living and non-living systems; give an example of human activity that changes the land, ocean, or atmosphere of Earth.


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