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A1.1 Water

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Published in: Biology | Science
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The attached PowerPoint is a preview for the NEW IBDP Biology CURRICULUM (A1.1 Water). This PowerPoint sample is an example of how I plan my lessons. By using visuals, colours, research questions, videos, and diagrams, I hope to engage students with a personalised learning experience that caters to a range of learner abilities (HL and SL) and study styles. Students will also receive a copy of printed notes that can be completed throughout each tutoring session. The notes align with the PowerPoint and include many colours/diagrams/visuals like in the PowerPoint. This ensures that all content can be studied at a rate that suits the student. Throughout the duration of the course, a folder with notes will build up as we progress through each subtopic.

Saoirse M / Dubai

0 year of teaching experience

Qualification: BSc. Science Education

Teaches: Biology, Science, ESS Environmental Systems And Societies, Environmental Scinece

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  1. A 1.1 — \Na€e4 "What physical and chemical properti "What are the challenges and opport oh life?' ater of åter aski habitat?"
  2. Al.l.l Al.1.2 Al.1.3 A 1.1.4 Al.1.5 Al.1.6 Al.1.7 AHL Al.1.8 AHL Water os the medium for life Hydrogen bonds os a consequence of the polar covalent bonds within water molecules Cohesion of water molecules due to hydrogen bonding and consequences for organisms Adhesion of water to materials that ore polar or charged Ond impacts for organisms Solvent properties of water linked to its role as o medium for metabolism and for transport in Physical properties of water and the consequences for animals in aquatic habitats Extraplanetary origin of water on Earth and reasons for its retention Relationship between the search for extraterrestrial life and the presence of water Students should appreciate thor the first ceils originated in 'M)ter and that water remains the medium in which most processes of life occur Students should understand that polarity of covalent bonding within water molecules is due to unequal shoring of electrons and that hydrogen bonding due to this polarity occurs between water molecuies. Students should be able to represent two or more water molecules and hydrogen bonds between them with the notat'ön shown below to indicate p o/ority. Include transport of water under tension in xylem and the use of water surfaces os habitats due to the effect known as surface tension Include capillary action in soil and in plant cell walls. Emphasize that o wide mriety of hydrophilic molecules dissolve in water and thor most enzymes cato/yse reactims in aqueous solution Students should also understand that the functions of some molecules in cens depend on them being hydrophobic and insoluble Include buoyancy, Wscosity, thermo' conductivity Ond specific heat. Contrast the physical properties of water mth those of Gir and illustrate the consequences using examples of animals thor jive in water and in Gir or on land, such os the block-throated Yoon (Gavia arctico) and the ringed sea/ (Pusa hispido) The ObundGnce of water over bilhons of vears of Earth's history hos ONowed life to evolve. limit hypotheses for the origin of wore,' on Earth to asteroids and reasons for retention to gravity Ond temperatures Yow enough to condense water Inc/ude the ideo of the "Go/diiocks zone".
  3. Water as the medium of Life has originated in water, with first cells enclosing a small volume of it in a membrane, where solutes dissolved and chemical reactions occurred. The interaction of molecules in water is the basis of all life.
  4. Water as the medium of life Please complete activity in notes Over of Earth's surface water, with st of water o ound in ans. Water Other saline water O. 96.5% Ground- 30.1% 20.9% G round 69.0% forms a large proportion of living organisms.
  5. Water as the medium of life RNA phospholipid H yd Early cells evolved membranes to separate their insides (cytoplasm) from the ocean water. Cell membranes (phospholipid bilayers) naturally form in aquaeous medium.
  6. Water Chemistry The 3-D structure of water: Bent and unsymmetrical shape — 'tetrahedral'
  7. Water Chemistry: Defined Polarity Water molecules are polar (one end is slightly + and the other end is slightly -) H H
  8. In notes: Name the type of bond formed between the atoms in a water molecule 'A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That's why water is sometimes referred to as 1420.'
  9. Draw a molecule of water showing bonding and non-bonding electrons, and highlight the polar covalent bond: Lone e: Pirs Oxygen Oxygen: 8P, 8E, 8N Hydrogen: IR IE, IN

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