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Delete - Last Modified By: TKH at 11/09/2014 1:16:29 PM
Questions suggested by students (Teachers add to the list as students have emailed the suggested questions)
Making Milk Glue
· Define curds. What are curds and how are they made?
· What is filter paper? What is it used for? How do you use filter paper?
· What do you need to do to milk to separate the curds from the whey?
· What do you need to make milk glue?
· What happens when we add acid (vinegar) and heat to the milk?
· List the reactants used to make milk glue
· Outline what you observed when you added vinegar and heat to milk.
Observing and Recording
· What is the difference between qualitative observations and quantitative observations?
· What are qualitative observations?
· What are quantitative observations?
Mystery powders:
· What happens when salt or sugar (solute) is stirred into water (solvent)?
· What is the difference between a soluble and an insoluble substance?
· What is plaster of paris made of?
· What happened to the sugar when added to vinegar?
· When iodine was added to sugar, what colour was it?
· What is the purpose of a solvent?
· What is a colloid? Describe the particle size of a colloid compared to those in a solution or a suspension.
Car safety features
· What are the 3 safety features in a car?
· Why do we have safety features to our cars?
· What is inertia? How can car safety features keep you safe from inertia?
Separating objects
· Name 5 ways to separate objects
· How can we separate objects using gravity?
· Why would we want to separate objects?
· How do you separate 3 different solid substances from water?
· Explain why filtration cannot be used to separate sugar from water?
· Define a solute and a solvent.
Forces: what are forces?
· What are forces?
· What types of forces are there?
· Explain inertia.
· Complete the sentence: For each action, there is an....
· In the crash test dummy experiment, explain why the dummy lunged forward when the trolley hit the stationary object.
Forces: friction
· What’s friction?
· Define a friction force?
· Does friction affect the pull force of the object being pulled?
· Explain what happened to the friction force when you added more mass to the block of wood before pulling it across the table/carpet.
Forces: gravity
· What is gravity?
· What is the difference between weight and mass?
· What is air resistance?
· When you drop a cricket ball of 70g and metal disk of 50g, the cricket ball takes longer to reach the ground. Explain why.
· Explain why a flat piece of paper takes a long while to float to the ground, compared to the same piece of crumpled paper, using the words air resistance and mass.
Chromatography
· What is chromatography? How does it work?
· Explain why some texta colours moved further along the newspaper.
Distillation
· What is the process of distillation?
· What are the different ways to turn undrinkable water into drinkable water?
· What happened to water molecules in the distillation experiment? Describe what happened using key words - evaporation, condensation, liquid, gas.
Purifying water
· How can water be treated and purified?
· What are different parts of the water cycle? Draw and label a diagram of the water cycle. Use the words - evaporation, condensation, precipitation, ground water.
Making a parachute
· What is the best advice you would give some who is designing a parachute for an egg experiment?
Edit Delete - Last Modified By: TKH at 14/09/2014 4:15:05 PM
Desalination
What is the main idea behind the desalination process?