Activity 01
The Float or Sink Challenge
Provide each group with a tub of water and a tray of assorted items like a leaf, a coin, a plastic bottle cap, a pencil, and an eraser. Students predict whether each item will float or sink before testing it and recording the result.
Explain why some things float in water while others sink.
Facilitation TipAsk students to group the floating items and sinking items and discuss what they have in common.
What to look forUse a 'Predict-Observe-Explain' worksheet where students first write their prediction, then record their observation during an experiment, and finally try to explain why it happened.
ApplyAnalyzeEvaluateSelf-AwarenessSelf-ManagementSocial Awareness
Generate Complete Lesson→· · ·
Activity 02
Disappearing Act
Students are given glasses of water and small amounts of salt, sugar, sand, and oil. They observe what happens when each substance is stirred into the water, learning to differentiate between soluble and insoluble materials.
Compare what happens when you mix salt in water versus oil in water.
Facilitation TipEncourage students to look closely at the water after stirring to see if it is clear or cloudy.
What to look forA short, picture-based quiz. For example, show a picture of a nail and a leaf next to a bucket of water and ask students to circle what will happen to each when dropped in.
ApplyAnalyzeEvaluateSelf-AwarenessSelf-ManagementSocial Awareness
Generate Complete Lesson→· · ·
Activity 03
Magnet Detectives
Give students a bar magnet and a collection of objects like a paper clip, a plastic ruler, an iron nail, a rubber, and an aluminium foil piece. They test each object to see which ones are attracted to the magnet and classify them accordingly.
Analyse the results of an experiment to see which materials are attracted by a magnet.
Facilitation TipChallenge them to find three other magnetic objects in the classroom that were not on the tray.
What to look forProvide a simple checklist for students: 'I can tell if something will float or sink', 'I know the difference between salt and sand in water', 'I can find magnetic things with a magnet'.
ApplyAnalyzeEvaluateSelf-AwarenessSelf-ManagementSocial Awareness
Generate Complete Lesson→A few notes on teaching this unit
Begin each activity with a question to spark curiosity, like 'What do you think will happen?'. Encourage students to work in groups to discuss their predictions and observations. Emphasise that there are no 'wrong' results in an experiment, only new things to learn and understand.
Through these hands-on experiments, your students will be able to test and explain why some things float while others sink, what happens when we mix things in water, and the magic of magnets.
Watch Out for These Misconceptions
All heavy things sink and all light things float.
Floating and sinking depend on density, not just weight. A huge wooden log floats because it is less dense than water, while a tiny iron nail sinks because it is denser than water.
When salt dissolves in water, it disappears forever.
The salt does not disappear. It breaks down into tiny particles that are too small to see and spreads throughout the water. You can prove it is still there by tasting the water (with caution) or by evaporating the water to get the salt back.
All shiny, metallic objects are attracted to magnets.
Only certain metals, like iron, nickel, and cobalt, are strongly attracted to magnets. Many common metals, such as aluminium, copper, and silver, are not magnetic.
Methods used in this brief