Shells do not move because they are hard, non-living structures. Movement in living creatures is generally facilitated by their muscles and other biological systems, while the shell remains stationary for protection.
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You can use a sieve to separate puffed rice from chana dal. Since puffed rice is lighter and has a different size compared to chana dal, a sieve with appropriate mesh size will allow the puffed rice to pass through ...
Solubility-based separation methods rely on dissolving substances in solvents, while density-based methods depend on differences in mass per unit volume. Solubility methods include filtration, while density methods include centrifugation and sedimentation.
Acting out the water cycle involves students role-playing stages like evaporation, condensation, precipitation, and collection. This interactive activity helps illustrate how water moves through its cycle, making the concept engaging and memorable.
Create a board game where players move through different states of water by answering challenge cards about the water cycle, evaporation and condensation. Correct answers advance them, while incorrect answers send them back.
To turn candle wax into a liquid state, heat it gently. The heat raises the wax’s temperature, causing it to melt. Use a heat source like a candle warmer or a pot of hot water.
The water in an earthen pot is cold because the porous material allows evaporation of water from the surface. This process absorbs heat, lowering the temperature of the remaining water inside the pot.
When water is sprinkled on a hot pan, it evaporates quickly. The heat causes the water to change from liquid to vapor, which disperses into the air, making it seem like it has disappeared.
Temperature affects the state of water by influencing its phase transitions. Increasing temperature can cause ice to melt or water to evaporate, while decreasing temperature can lead to freezing or condensation of water vapor.
Water evaporates when it absorbs heat energy, which increases the kinetic energy of its molecules. This energy allows the molecules to escape from the liquid state into the gas phase as water vapor.