Changes in Solids, Liquids, and Gases

Changes in Solids, Liquids, and Gases

Science 3 (Wednesdays 9:00 AM to 10:00 AM)

​Let us Review!

Multiple Choice

Which of the following best describes matter?

• Matter is anything that occupies space and heavy mass.

• Matter is anything that occupies space and has mass.

Multiple Choice

Mass changes depending on the gravity of the place while weight is always the same.

• TRUE

• FALSE

Multiple Choice

What do we call the ability of liquids to resist flowing?

• viscosity

• volume

Multiple Choice

This is the state of matter where the shape do not easily change when placed on a different container.

• solid

• liquid

• gas

Multiple Choice

What special property of solids that makes them easily broken into pieces?

• hardness

• elasticity

• brittleness

Multiple Choice

What is the similarity of a liquid and a gas?

• They both don't have a definite shape and both follows the shape of their container.

• They both have a definite shape and but both of them follows the shape of their container.

Multiple Choice

If you do not put this state of matter  in a container, it will just spread out and fill-up empty spaces.

• solid

• liquid

• gas

Multiple Choice

What will happen if a liquid is heated?

• Its particles move faster and spaces between them widen.

• Its particles move slower and spaces between them narrows.

Multiple Choice

What will happen if a liquid is cooled?

• Its particles move faster and spaces between them widen.

• Its particles move slower and spaces between them narrows.

​In this lesson, you are expected to:

• describe changes in materials based on the effect of temperature;

• evaluate whether changes in materials are useful or harmful to one’s environment; and

• execute ways in changing the states of matter.​

Open Ended

How do you think solids change into liquids?

Open Ended

How do you think liquids change into solids?

Open Ended

How do you think liquids change into gas?

Poll

Can a gas change into liquids?

• YES

• NO

• MAYBE

​Changes in Matter

The state of matter may be changed depending on the temperature of its environment.

​Melting

​The process of which solids change into liquids because of high temperature.

Open Ended

Give examples of solids that could melt in high temperature.

​Freezing

​The process of which liquids change into solids because of low temperature.

Open Ended

Give examples of liquids that could freeze in low temperature.

​Evaporation

• ​The process of which liquids change into gas because of high temperature.

• The smoke-like substance is called steam or water vapor.

Condensation

• ​The process of which gases change into liquids because of low temperature.

• When water vapor touches a cooler surface, it turns into liquid again.

​Sublimation

• ​The process of changing solid into gas without passing the liquid phase.

• ​This process relies on air and heat.

Multiple Select

Which processes relies on high temperature?

• melting

• freezing

• evaporation

• condensation

• sublimation

Multiple Select

Which processes relies on low temperature?

• melting

• freezing

• evaporation

• condensation

• sublimation

Poll

Is there a possibility that the change of the state of a matter is harmful to the environment?

• YES

• NO

• MAYBE

​How can the change of Matter harm our environment?

​It can harm the environment if the change can cause pollution.

Poll

Is there a possibility that the change of the state of a matter is useful to the environment?

• YES

• NO

• MAYBE

​How can the change of Matter be useful to our environment?

​Let us Evaluate!

Multiple Choice

Boiling water to make a coffee in the morning.

• harmful to the environment

• not harmful to the environment

Multiple Choice

Water cycle

• harmful to the environment

• not harmful to the environment

Multiple Choice

The use of pesticides.

• harmful to the environment

• not harmful to the environment

Multiple Choice

The use of air fresheners.

• harmful to the environment

• not harmful to the environment

Multiple Choice

Leaving a glass of water in the freezer.

• harmful to the environment

• not harmful to the environment

Do you have any questions?​