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Water is limited Needed for life Prevents drought and shortage
The water cycle is the natural process by which water moves through the Earth’s surface, atmosphere, and back again. This cycle helps recycle water and maintain life on Earth.Steps of the Water Cycle:1. Evaporatio...
Transparent Objects Definition: Objects that allow light to pass through completely. You can clearly see through them. Example: Clear glass, clean water, clear plastic 2. Translucent Objects Definit...
The leaf is one of the most important parts of a plant. It performs several key functions that help the plant survive and grow.Main Functions of a Leaf:1. Photosynthesiso The leaf makes food for the plant using s...
Heating can cause different types of changes in materials. Some changes are physical, where the material changes its state but not its identity, and some are chemical, where a new substance is formed.
Reversible Reaction: A reaction that can go in both directions — the products can change back into the original reactants. Example: Melting and freezing of ice.Irreversible Reaction: A reaction that cannot go ba...
By evaporation: Heat the solution until water evaporates and salt is left behind.
Common methods:o Hand picking: Stones from riceo Sieving: Sand from gravelo Filtration: Mud from watero Evaporation: Salt from saltwater o Decantation and sedimentation: Mud from water
Materials are grouped by:o Appearanceo Hardness or softnesso Solubilityo Transparency o Ability to conduct heat/electricity
Grouping materials helps us to understand their properties, uses, and how they interact with other materials.
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