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.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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Water changes from solid (ice) to liquid (water) through the process of melting. When heat is applied, the temperature rises, causing the ice to absorb energy and transition into a liquid state.
Water exists in three states: solid (ice), liquid (water), and gas (steam or water vapor). Each state has distinct properties and transitions between states occur due to changes in temperature and pressure.
No, touching a person is not a reliable method to diagnose fever. Body temperature can be difficult to assess accurately by touch alone. Using a thermometer provides a precise measurement to confirm if someone has a fever.
During the COVID-19 pandemic, infrared thermometers were used to measure a person’s temperature from a distance. They detect heat radiating from the body and provide quick, non-contact temperature readings.