GRADE 7 SCIENCE
Grade 7 students have been investigating attributes and properties of water. Students have learned that a molecule water is made up of 1 atom of Hydrogen and 2 atoms of Oxygen. Students demonstrated this through the making of paper models of a molecule of water.
Students have compared water with a common oil to determine the similarities and differences between them. Water was not easy to move using a toothpick. When students tried to split the drop into two, they found that the water drop changed shape but the water drop tried to stay together. When the same experiment was done with the oil, students noticed that the oil moved but tried to move back towards the original droplet.
They discovered that a water drop is higher and rounder than a drop of oil. They predicted that oil might be heavier than water.
Students explored what would happen when oil drops were added to water and water drops added to oil. They observed that the oil surrounded and covered the water. When students tried to move the water and oil with a toothpick they found it was quite challenging.
| Water drop showing rounded dome top | Water drop acting as a magnifer |
Side view of water drop |
| Side view of water drop | Trying to split water drop into two | Air bubbles inside water bubble |
| The effect of sunlight going through water | Side view of oil drop | Trying to split oil into two |
| Water and oil drops before the toothpick | Water and oil drop after the toothpick |
Students were required to research and write up a definition of molecules and atoms including components of atoms.
