Drops on a coin Follow FizzicsEd 150 Science Experiments: Comments 8 You will need: A coin A pipette, eyedropper or a straw Clear water A mess bucket and cleaning materials Copyright Instruction 1 Place the straw in some water and then put your finger over the end. You can now remove the straw and keep the water inside (this works due to air pressure holding the water up). You could use a pipette to make this science activity easier too. 2 If you’re using the straw, carefully remove your finger to release your first drop of water. 3 Keep adding water drops, counting each one! 4 If you look from the side, you should start to see the water begin to bulge over the side of the coin We find a pipette easier for this part of the experiment. 5 Keep going until the water spills over the side of the coin. 6 Get the Unit of Work on Water Science here! Explore the water cycle Learn about cohesion, adhesion & capillary action From water currents to floatation, join us to explore water science! Includes cross-curricular teaching ideas, student quizzes, a sample marking rubric, scope & sequences & more 7 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. – Early learning centre visits too! 8 Online courses for teachers & parents – Help students learn how science really works What is happening? The attractive forces between water molecules (called intermolecular forces) draw the molecules together. This happens in all liquids, where their molecules are more strongly attracted to each other than to the things around them. At the surface, the molecules are touching fewer other molecules, and so their attractive forces are stronger with the molecules they are touching, beside and below them. This holds the surface molecules together and holds the water in place over the coin, stopping water spillage for much longer than you would expect. Because of surface tension, liquid surfaces act like a kind of ‘skin’, able to support small insects and materials on their surface. Variables to test More on variables here Hot vs. cold water… does it make a difference? What happens when the water has detergent in it? Dirty vs. clean coins Different size coins Learn more! Teaching about how water works? Check out the Working with Water workshop! Get in touch with FizzicsEd to find out how we can work with your class. Working with Water Years K to 2 Maximum 30 students School workshop (NSW & VIC) 60 or 90 minutes Online Class Available Read More Enquire Now Sale! Anti Gravity Timer $10.95 Original price was: $10.95.$9.95Current price is: $9.95. inc. GST View Details Add to Cart Trustpilot 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. Read More Enquire Now Be Amazing! How to teach science, the way primary kids love. $29.95 inc. GST View Details Add to Cart Trustpilot
Place the straw in some water and then put your finger over the end. You can now remove the straw and keep the water inside (this works due to air pressure holding the water up). You could use a pipette to make this science activity easier too.
If you look from the side, you should start to see the water begin to bulge over the side of the coin We find a pipette easier for this part of the experiment.
Get the Unit of Work on Water Science here! Explore the water cycle Learn about cohesion, adhesion & capillary action From water currents to floatation, join us to explore water science! Includes cross-curricular teaching ideas, student quizzes, a sample marking rubric, scope & sequences & more
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. – Early learning centre visits too!
Teaching about how water works? Check out the Working with Water workshop! Get in touch with FizzicsEd to find out how we can work with your class.
Working with Water Years K to 2 Maximum 30 students School workshop (NSW & VIC) 60 or 90 minutes Online Class Available Read More Enquire Now
Sale! Anti Gravity Timer $10.95 Original price was: $10.95.$9.95Current price is: $9.95. inc. GST View Details Add to Cart Trustpilot
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. Read More Enquire Now
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.
Be Amazing! How to teach science, the way primary kids love. $29.95 inc. GST View Details Add to Cart Trustpilot
Wow! Its been a while since I’ve done this experiment. Can you find anything on the internet that describes why this is the case? Great job! Reply
Ha! Nah, I’m not a bot 🙂 Can you get more drops than 10 on a $1 coin? I’ve got roughly 30 or so once. Let us know how you go! Reply
Hello Ben, just wanted to let you know that I am using your page for my chemistry assignment. My task is to create a 5-minute video completing an experiment related to chemistry. I chose your experiment as you explained it very well and you also made sure to demonstrate it very clearly. Thank you for your help, I’m going to be citing your work too! 🙂 Reply
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