Explanation

• Decantation is the process of carefully pouring a liquid from one container to another, leaving the solid particles that have settled at the bottom of the original container behind.
• This process is used to separate a liquid from a solid, without disturbing the solid.

Explanation

• Water (H2O) is a compound made up of two hydrogen atoms and one oxygen atom.
• It is a chemical combination of two different elements, which is the definition of a compound.

Explanation

• Solids like sand remain suspended in water because they are denser than water.
• But not dense enough to sink to the bottom immediately.
• This creates a heterogeneous mixture, where the sand particles remain suspended in the water.

Explanation

• Solids like sawdust float on water because they are less dense than water.
• When sawdust is added to water, it forms a heterogeneous mixture.
• Where the sawdust particles remain separate from the water and float on the surface.

Explanation

• Solids like salt (sodium chloride) dissolve in water to form a saltwater mixture or solution.
• When salt is added to water, the salt particles break apart and distribute evenly throughout the water, creating a homogeneous mixture.

Explanation

• Liquids can be converted into solids by cooling, a process known as freezing or solidification.
• As the temperature decreases, the particles of the liquid slow down and come together, forming a solid.

Explanation

• Gases can be converted into liquids by cooling, a process known as condensation.
• As the temperature decreases, the particles of the gas slow down and come together, forming a liquid.

Explanation

• Liquids can be converted into gases by heating, a process known as vaporization or evaporation.
• As the temperature increases, the particles of the liquid gain energy and move faster, eventually breaking free from the surface tension of the liquid and turning into a gas.

Explanation

• Solids can be converted into liquids by heating, a process known as melting.
• This occurs when the particles of the solid gain enough energy to break free from their fixed positions and start moving freely, resulting in a liquid state.

Explanation

Matter can change from one form to another through various processes, including:

• Heating: Melting (solid to liquid), Vaporization (liquid to gas)
• Cooling: Freezing (liquid to solid), Condensation (gas to liquid)

For example, ice (solid) can change to water (liquid) by heating, and water (liquid) can change to steam (gas) by further heating.

Similarly, steam (gas) can change to water (liquid) by cooling, and water (liquid) can change to ice (solid) by further cooling.