Open AnnabelleBuda opened 6 years ago
Properties of solids, liquids, gases
Reversible and irreversible changes
Air and mass
Properties and uses
Reasons and benefits of solid, liquid and gas fuels
Making bath bombs: baking soda, citric acid, magnesium sulfate (unnecessary), oil
Hot ice (change of state: provide sodium acetate and vinegar, teacher demonstration)
Capture carbon dioxide gas in balloons: Where is it coming from?
Use CO2 as an engine to propel a mini vehicle: Uses from properties of materials/ reactions
Can look at gas having mass? Weight of solutions before and after reaction.
Change of state from solid to liquid/gas and irreversible reactions
Hot ice as a reversible reaction (recrystallisation) Uses/properties of hot ice (pocket hand warmers and bath bombs)
Modelling particles with analogy: comparing macroscopic and microscopic properties of substances (eg sand, sugar, salt).
Is sand/ flour a liquid? Properties apply at a molecular level.
https://www.scientificamerican.com/article/sudsy-science-creating-homemade-bath-bombs/ https://www.scientificamerican.com/article/build-a-balloon-powered-car/
Amounts for 1 bath bomb.
Total approximate cost: $40-50 (whole class kit)
1) Make invisible inks 2) Write spy letters using invisible inks 3) Test methods of revealing invisible inks 4) Reveal the spy letters and identify the ink
Total approximate cost: $40-50
1) Create a homemade thermometer using a small jar, blu-tack and a clear straw. 2) Test the effect of heat on the expansion of water and water with salt. 3) Link the expansion of water to the expansion of the ocean leading to rising sea levels.
Complete Student Inquiry sheet.
Part A (Assembling the thermometer): 1) Fill the bottle to the brim with water mixed with a few drops of food dye. 2) Cover carefully with a piece of parafilm (parafin wax) and insert the straw through the parafilm into the water. 3) Make sure the seal around the straw and the neck of the bottle is airtight using more parafilm and/or blu-tack. 4) Blow gently into the straw to test the seal. The water should come up the straw a little when you stop blowing. 5) Set the thermometer on a stable surface and use a permanent marker to mark the level of the water in the straw and room temperature. 6) Attach the pre-made thermometer to your bottle using sticky tape and record the temperature.
Part B (Measuring changes in temperature): 1) Use a hairdryer to warm the bottle. Mark the new height of the water and the reading from the thermometer. 2) Measure the height difference between the original marking and the new marking. Also calculate the difference in temperature from the starting temperature to the new thermometer reading. 3) Allow the thermometer and the bottle to return to room temperature and repeat steps 1 and 2.
Part C (Repeat with salt water): 1) Dissolve 35 g of salt into 1 L of water to simulate ocean salinity. 2) Repeat Part A and Part B using the salt water instead of plain water.
Complete Student Reflection sheet.
-250 mL bottle $3.00
Total approximate cost: $25- $30
Focusing on: