Introduction
What Is a State of Matter?
The word "matter" refers to everything in the universe that has mass and takes up space. All matter is made up of atoms of elements. Sometimes, atoms bond together closely, while at other times they are scattered widely.
States of matter are generally described on the basis of qualities that can be seen or felt. Matter that feels hard and maintains a fixed shape is called a solid; matter that feels wet and maintains its volume but not its shape is called a liquid. Matter that can change both shape and volume is called a gas.
Task
Identify whether the given example is a solid, liquid or gas. Encircle the letter of your choice.
1.)Wood
a. Solid
b. Liquid
c. Gas
2.) Table
a. Solid
b. Liquid
c. Gas
3.) Rock
a. Solid
b. Liquid
c. Gas
4.) Water
a. Solid
b. Liquid
c. Gas
5.) Air
a. Solid
b. Liquid
c. Gas
Process
There are three common states of matter:
1.)Solids
In a solid, particles are packed tightly together so they don't move much. The electrons of each atom are constantly in motion, so the atoms have a small vibration, but they are fixed in their position. Because of this, particles in a solid have very low kinetic energy.
Solids have a definite shape, as well as mass and volume, and do not conform to the shape of the container in which they are placed. Solids also have a high density, meaning that the particles are tightly packed together. Solids are sometimes formed when liquids or gases are cooled; ice is an example of a cooled liquid which has become solid. Other examples of solids include wood, metal, and rock at room temperature.
2.)Liquids
In a liquid, the particles are more loosely packed than in a solid and are able to flow around each other, giving the liquid an indefinite shape. Therefore, the liquid will conform to the shape of its container.
Much like solids, liquids (most of which have a lower density than solids) are incredibly difficult to compress. Examples of liquids include water and oil. Gases may liquefy when they cool, as is the case with water vapor. This occurs as the molecules in the gas slow down and lose energy. Solids may liquefy when they heat up; molten lava is an example of solid rock which has liquefied as a result of intense heat.
3.)Gases
In a gas, the particles have a great deal of space between them and have high kinetic energy. A gas has no definite shape or volume. If unconfined, the particles of a gas will spread out indefinitely; if confined, the gas will expand to fill its container. When a gas is put under pressure by reducing the volume of the container, the space between particles is reduced and the gas is compressed. Examples of gases are air, oxygen, and helium. Earth's atmosphere is made up of gases including nitrogen, oxygen, and carbon dioxide.
Evaluation
True or False. Write T if the statement is true and F if the statement is false.
______1.)There are three states of matter.
______2.)The particles of a gas are packed tightly together.
______3.)Gas is a state of matter.
______4.)Solid do not take the shape of the container they are in.
______5.)Gases are hard to compress.
______6.)Liquids are easy to compress.
______7.)A solid has no definite shape.
______8.)The particles of a liquid are more loosely packed than in a solid and are able to flow around each other.
______9.) Gas has an indefinite shape.
______10.)Solids have a definite shape as well as mass and volume.
Conclusion
For this plan, the students should have learned all about the three states of matter. Can already identify them and give an example in each states. Students have also learned how the states of matter change into other states.
Credits
Teacher Page
RHEENA LHYN M. GENISTON
BEED-2