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Properties and States of Matter Worksheet

Grade 8 Science Worksheets

The universe is made of matter. The tiniest of particles, Atoms, combine to form molecules, which are the building blocks for all forms of matter. There are primarily three physical states of matter – solid, liquid, and gas. A fourth state, plasma, is very common in the universe but not so common on earth.

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Reinforce Learning with States of Matter Worksheets

Solids have a form and do not undergo change in shape easily, such as wood or stone.

Liquids have no shape of their own and take the shape of whatever they are kept in, such as water or gasoline.

Gases have no definite shape or volume, they expand in all direction or they can be compressed in a small space, such as hydrogen or helium gas.

Plasma is formed by providing intense heat to gas, causing it to “ionize” – i.e. the electrons have escaped their atoms. It is commonly found inside stars in the universe. On earth it needs to be specially created. Some examples are neon signs, fluorescent lamps and plasma TVs.

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Physical Properties of Matter

These states of matter have physical properties that distinguish them from one another. Some of the physical properties are tabulated below:

Table showing Physical Properties of Solid, Gas and Liquid

Energy and Matter

All matter has energy. One form of energy is in the movement of particles that make up matter. It is this movement of particles that help define the properties of matter itself. The energy of moving matter is called Kinetic Energy.

Solid particles have the least energy to move, which is why they don’t change shape easily. Liquid particles have more energy than solid particles and gas particles have most of all. Hence, Kinetic Energy increases as the fluidity of matter increases (from solid to liquid to gas to plasma).

Another form of energy, Potential Energy, is associated with the position or condition of matter. It is associated with the matter at rest, yet having the ‘potential’ to do work in that state. Examples include the potential for a solid to fall from a height or for water behind a dam to flow to a lower position. Solids have higher potential energy due to the closeness of their particles. A solid with the ‘potential’ to fall down has more potential energy than a liquid in that position and least of all for a gas in that position. Hence, Potential Energy decreases as the fluidity of matter increases (from solid to liquid to gas to plasma).

Check Point

  1. Two or more atoms combine to form a ______.
  2. Intensely heating a gas creates a state called ______.
  3. Which particles have the most Kinetic Energy?
    1. Liquids
    2. Solids
    3. Plasmas
    4. Gases
  4. Which particles have the most Potential Energy?
    1. Liquids
    2. Solids
    3. Plasmas
    4. Gases
  5. The form of energy associated with moving matter is called ______ energy.

Answer Key

  1. Molecule
  2. Plasma
  3. c) Plasmas
  4. b) Solids
  5. Kinetic

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What are the three common states of matter?

The three common states of matter are solid, liquid, and gas. Each state has its own unique characteristics and properties.

What is the difference between a physical property and a chemical property of matter?

Physical properties describe the characteristics of matter that can be observed or measured without changing the substance’s identity. Chemical properties, on the other hand, describe how matter behaves in the presence of other substances and involve its ability to undergo chemical reactions.

Are there 8 states of matter?

While the traditional states of matter include solid, liquid, and gas, the concept of eight states of matter is a topic of ongoing scientific exploration and debate. While additional states such as plasma, Bose-Einstein condensate, and some exotic states like quark-gluon plasma have been observed or theorized, the categorization of matter into distinct states is not universally agreed upon. The study of matter’s different forms and behaviors is a dynamic field, and scientists continue to investigate and discover new states of matter, expanding our understanding of the fundamental nature of the physical world.

Can matter change from one state to another?

Yes, matter can undergo phase changes such as melting, freezing, evaporation, condensation, and sublimation, which involve the transformation between different states of matter.

What are some examples of physical properties of matter?

Examples of physical properties include color, density, melting point, boiling point, conductivity, solubility, and flexibility.

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