You Will Need:
- Five tea bags.
- One litre of hot water.
- Different food samples, with 100g or material each.
- Coffee filters and disposable cups.
- One blender.
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School science visits since 2004!
– Curriculum-linked & award-winning incursions.
– Over 40 primary & high school programs to choose from.
– Designed by experienced educators.
– Over 2 million students reached.
– Face to face incursions & online programs available.
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Why Does This Happen?
Tea contains tannins, chemical compounds found in plants. Tannins are used by the leather making industry to tan leather, as well as to influence the taste of wine.
Tannins also bind to iron in a process called chelation. If there was iron present in your food you would have found a tiny amount of a black solid (known as a precipitate). You need iron to make red blood cells. If you drink too much tea you may stop iron in your food being absorbed by your body!
Drinking tea is good for you, but try to avoid drinking tea when eating if you know you’re low in iron.
Variables to test
- Can you soak brown leaves in water to produce the same effect?
- Use freshly chopped tea, green tea, herbal tea and whole tea leaves to compare the difference.
- What happens when you use different liquids?
From colour changes to slimy science, we’ve got your kitchen chemistry covered!
Get in touch with FizzicsEd to find out how we can work with your class.
Chemistry Show
Years 3 to 6
Maximum 60 students
Science Show (NSW & VIC)
60 minutes
Online Class Available
STEM Full Day Accelerator - Primary
Designed from real classroom experiences, this modular day helps you create consistently effective science learning that directly address the new curriculum with easily accessible and cost-effective materials.
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