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Aim: To investigate how photosynthesis and respiration rates change with changing light conditions in algae  Scenedesmus quadricauda . CLICK HERE FOR A COPY OF THE ASSIGNMENT   Including the picture with pH readings  Interpreting Results: Make up a table like below Dark conditions Indirect Light Conditions Direct Light conditions pH readings Average pH reading If there ends up being a big difference between Wednesday's results (below) and Thursday's results then perhaps two tables would be best. Wednesday's Results  Algae Ball Results 3pm Wednesdaya 26th September Thursday's Lesson: You should aim to do your results section today:       1.  A table of results (as above), it may need to include photographs.        2.  A written summary of what was found (not discussion though, just stating exactly what was       found)      ...

We know that pH is a measure of H+ ions (for acids)  or OH- ions (for bases). So how does adding CO2 to a water-based liquid, manage to change its pH? What is carbonic acid, and what does it do? Carbonic Acid: How does it work? Bozeman Science: Ocean Acidification video Wikipedia: Carbonic Acid (way too much detail, but a good overview) What happens when acids react with calcium carbonates? Naked Scientist Website

The Powerpoint from class can be found here > ETE Chemistry Powerpoint What am I Getting Tested On? a.        Reading the periodic table and, from this, being able to draw a basic atom model with P,N, E b.        Properties of metals, non-metals, metalloids (basics only!) c.        Essential plant nutrients: only need to know the role of one plant nutrient (you have already done this and it’s on the mini-posters you made) d.        Chemical Reactions: -           Reading equations. Identifying products and reactants -           Conservation of mass theory -           Balancing chemical equations -           Octet rule: What is it? How does it inform the reaction (and reactivity) of differ...

What am I expected to know in the Chemistry Unit? Chemistry Fundamentals 1. Read the periodic table to determine the protons, electrons and neutrons of an atom 2. Read chemical equations and identify how the molecules are made and how many atoms there are in the products (and reactants). 3. Link your understanding of the point above (2) to the theory of conservation of mass.  This means that mass is neither created or destroyed in a chemical reaction. 4. Balance chemical equations 5. Identify when chemical reactions have occured, and identify corrosion, photosyntheis, and respiration reactions. Chemical Reactions: Photosynthesis 1. Know the purpose of photosynthesis, its products and reactants (in words not the formula) 2. Know the site of where photosynthesis occurs in the leaf (cell and organelle) 3. Know why photosynthesis is important for the ecosystem - - - - - Photosynthesis Overview 1. Get an overview of how photosynthesis occurs within most leaves.  Look over the two l...

What will we be learning in the Chemistry unit? -Understanding atomic structure and the periodic table in (more) depth -Relating this to our understanding of soil and plant nutrition -Ions, anions and chemical bonding & how this impacts how plants take up nutrients -Elemental classification: metals, non-metals and metalloids -Chemical reactions: Photosynthesis and Respiration -pH. What it means and how it impacts plant growth. Let's start with refreshing you on the basics: Here are the links you'll need for the worksheet: 1. Scale of the Universe 2.    Khan Academy: Atoms Your Plant Nutrient Poster 1. Select one of the 17 essential plant nutrients Hydrogen Boron Carbon Nitrogen Oxygen Magnesium Phosphorus Sulfur Chlorine Potassium Calcium Manganese Iron Nickel Zinc Copper Molydendum 2. Make a small, A5 poster which clearly states: a) The elements name, symbol, atomic mass and electron shells b) A diagram of the atomic structure ...

Have a go at this! Your Aim: To be able to balance worded equations To be able to balance simple numerical equations Video:  How to Balance Chemical Equations (Simple) Video:  How to Balance Chemical Equations (the one we watched in class) Video:  Khan Academy: Balancing Chemical Equations Video: Khan:  Visually Understanding Chemical Equations Exercise:  Balancing Chemical Equations  (Gap Fill) Exercise:  Balancing Chemical Equations  (Khan Academy) A fairly simple worded explanation is below (click to enlarge)

Part 1: Answer to the splint question " Where did the mass go?" Learn about combustion as a chemical reaction here: Combustion of Wood (simplified) Here's another simple version: Combustion in general terms Be aware, smoke is not a gas, but a mixture of gases, solids and water vapour.  Part 2: Law of Conservation of Mass Read about it here: Thoughtco Conservation of Mass (website) Watch it here: Conservation of Mass Ted-Ed Take down some key ideas in your book Extension Ideas: Conservation of Mass in Nature (Nature website) What about Black Holes? A forum with some interesting ideas.