Introduction About Changes in Matter :
Matter exists as solids, liquids, gases, and plasma phases or states. A phase change is a transition ofmatter from one state to another. There are a total of eight phase changes that can occur. Let’s look at what happens in each change. Freezing occurs when a liquid changes to a solid.To know more about Changes in Matter,watch Changes in Matter Video to learn more .
Type Of Matters:
There are two types of change in matter: physical change and chemical change. As the names suggest, a physical change affects a substance’s physical properties, and a chemical change affects its chemical properties. Many physical changes are reversible (such as heating and cooling), whereas chemical changes are often irreversible or only reversible with an additional chemical change.
Changes in Matter :
All matter can move from one state to another. It may require extreme temperatures or extreme pressures, but it can be done. Sometimes a substance doesn’t want to change states. You have to use all of your tricks when that happens. Phase changes happen when certain points are reached. Sometimes a liquid wants to become a solid. Scientists use something called a freezing pointor melting point to measure the temperature at which a liquid turns into a solid. There are physical effects that can change the melting point.Pressure is one of those effects. When the pressure surrounding a substance increases, the freezing point and other special points also go up. It is easier to keep things solid when they are under greater pressure.
Generally, solids are more dense than liquids because their molecules are closer together. The freezing process compacts the molecules into a smaller space.
Useful for CBSE, ICSE, NCERT & International Students
Grade : 5
Subject : Evs
Lesson :States of matter
Topic: Changes in Matter
Visit www.oztern.com to find personalized test preparation solutions for Pre Medical – AIPMT, AIIMS, JIPMER, State, Pre Engineering – IIT JEE, JEE MAIN, BITSAT, State and Foundations – Class 6 to 10.