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Description

Fun with Water and Science (STEAM)

Resources

- Four glass tumblers (glass) – 3 medium and one tall.
- A Bowl – this will be half filed with water and we will see if 5 items of their choice will sink or float (eg wooden ruler, knitting wool, food, a leaf etc..
- Good quality high absorbency eg plenty kitchen paper (cheaper ones don’t work as well).
- 3 or 4 food colouring and a felt tip marker or two (for Walking water and fireworks in water) .
-Small amount of vegetable/other oil
- Bicarbonate of soda and Vinegar
- A balloon a bottle which balloon neck can fit snugly over.
- An orange cut into six

Instructions

Introduction / Icebreakers

Bean Game
When the leader shouts out the name of a bean the girls should do actions below
String beans – stretch up as high as you can.
Broad beans – make yourself as wide as you can.
Runner beans – run on the spot.
Jumping beans – jump on the spot.
Jelly beans – shake your whole body like jelly.
Baked beans – wipe your brow and say, ‘Phew!’.
Beans on toast – lie flat on the floor.
Chilli beans – shiver as though you are very cold.
Mr. Bean – shrug your shoulders and make a confused face.
Beanie Baby – suck on your thumb.
Human beans – exclaim, ‘To bean or not to bean!’
Bean bags – huddle in a ball on the floor.

or

SIMON SAYS
Choose one child as “Simon.” The other children gather around Simon, who gives instructions by saying, “Simon says…” telling the kids to perform a physical action. For example, "Simon says touch your nose," "Simon says
shake like a leaf." Each child must perform the action. If Simon leaves out “Simon says” before giving instruction, anyone who performed the activity is out!

Activity 1 - Walking on water OGM Stem 1 (10/15 mins)
https://www.youtube.com/watch?v=s2Jud7F478I
3 or five glasses
Red Green and Yellow food dye (2 or 3)
Using 3 glassed.
Fill 2 glasses to about 2/3 full and leave one empty
Place empty glass in the middle
Put about 5 drops of red dye into the first glass of water and 5 drops of blue into the second glass of water
Cut a section of kitchen paper in half lengthwise and fold lengthwise. Then fold from top to bottom to form a crease in middle
Place one end into the red liquid and the other into the empty glass.
Place the second into the empty glass and the blue liquid.
The colours will immediately start to climb the paper. This is called capillary action – the adhesive pull of the paper is stronger than the cohesive forces pull of the water.
The liquids continue to move along the paper into the empty glass until all three are level. The liquid in the middle glass is now purple as red and blue make purple.
If using the 5 glasses put yellow liquid into another glass and place an empty glass between the blue and yellow.
These two colours will make green liquid.
It takes up to an hour or more for all this to happen. This is why we are doing it first!!

HOW TO GROW A RAINBOW https://www.youtube.com/watch?v=8iZCNnYewmk
(KITCHEN PAPER AND FELT TIPPED PENS
Activity 2 - Float or sink?
I bet you know that wood floats but a rock sinks. But why? Let’s look deep inside each object at its molecules. Everything is made of molecules. Molecules are very, very tiny. You can only see them with a special microscope. In some objects, like a rock, molecules are squished tightly together. In others, like wood, the molecules are more spread out. How closely molecules are crowded together in a space is called density. Density is a big part of why some things float and others don’t. Objects like
coins, rocks, and marbles are more dense than water. They will sink. Objects like apples, wood, and sponges are less dense than water. They will float. Many hollow things like empty bottles, balls, and balloons will also float. That’s because air is less dense than water. Sometimes if part of something is removed it no longer floats eg. An orange floats because the skin lis light and airy. When the skin is
removed the orange will sink as the inside is denser and does not much air in it to make it float!

Float - Why?
Orange ( with peel), wood, small plastic ball, flower head. Sponge, plastic lid, paper, apple, plastic bottle (empty) balloon. Oil floats on water because water is denser than oil and oil is unable to break the hydrogen bonds in the
water.
Density – mass + volume Tins same volume by mass is heavier so makes coke denser so it sinks

Sink - Why?
Plastic bottle (full – no air), Stone, Marbles. Coins, Coke
The outside of an object is called its surface. When more of the surface is touching the water, the object is more buoyant (BOY-ant), which means it floats better. When an object floats, it pushes water out of the way.
That’s called displacement. But guess what? Water pushes back! So the more surface area an object has, the more water pushes back against it, helping it float.

Activity 3 - Blowing up a balloon by changing the states of matter!! (5 -10 mins)
NOTE.
The 3 main states of matter are - solid liquid and gas. Good example is water – ice (particles very dense and close together), water (particles are close but not as packed) and steam (particles are widely spaced!!!!
LIQUID TO SOLID – CALLED? – FREEZING!!
SOLID TO LIQUID – CALLED? – MELTING!!
LIQUID TO GAS – CALLED? - EVAPORATE

Needed
Empty water bottle with small opening (Glass or plastic)
Bicarbonate of soda (Baking soda) – the base
Vinegar – the acid

Method
Fill bottle about a third full with vinegar
Using a funnel (Can be made with paper) put a heaped tablespoon of Baking soda into the balloon.
Stretch the balloon over the opening of the bottle, being careful not to spill any of the Baking soda in yet.
When the balloon is secure on the bottle empty the powder into the vinegar and watch the balloon inflate!

The Science
The base and the acid combine to form a gas (Carbon Dioxide – CO2) which inflates the balloon! This shows how the states of matter can change ie liquid and solid becomes gas.

A Base accepts protons and electrons - hydroxide ions , BITTER
An acid donates protons and electrons - hydrogen ions SOUR OR TANGY eg lemon

EVERYTHING IN THE WORLD IS MADE UP OF ATOMS MOLOCULES AND IONS

Activity 4
Orange sizzle break – put a small amount of bicarbonate of soda on orange and bit into it. Popping sensation in mouth as acid meets bicarb base!

Activity 5
Drop food colouring onto a glass filled with water and top with a layer of vegetable oil. Creates fun slashes as it breaks through the oil. Discuss oil/water, what mixes well etc

Tags

• COVID 19
• Octagon 2021
• science
• Social distanced activity
• Steam
• Water experiment
• Zoom

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