Science 3

Science 3

Prayer

Open Ended

Solid with round shape

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Solid with smooth texture

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Breakable solids

Open Ended

Unbreakable solids

Open Ended

Solid of plastic materials

Solid

• 
  

In solid, the molecules are held firmly by the force of attraction between them. The molecules in solids move through vibration and they are very close to each other

Examples of solids are stone, wood, pencil, scissors, book, chair and bag

Solids have special properties:

A. Hardness is the property of solid to resist scratching or abrasion.

B. Malleability is the ability of materials to be pressed, hammered, or rolled into various shapes and sizes without breaking

C. Brittleness is the tendency of a material to be easily broken into pieces.

D. Elasticity is the property of solid materials to be stretched when pressure is applied on them.

E. Strength Metals are used to construct buildings, bridges, and roads because they are very strong

Open Ended

How do you describe a solid object?

Multiple Select

Which among the following are special properties of solid?

• elasticity

• strength

• soft

• malleability

• hardness

Liquid

• Liquids

  Compare to molecules of solids, the molecules in liquids are farther apart from each other. The force of attraction among the molecule is weak. They always move, roll, or bump each other.

  This is the reason why liquids can change shape. Liquids take the shape of their container.

Other Characteristics of Liquid

1. Liquids have definite volume but no definite shapes.

2. Liquids expand when heated. Their molecules move faster and the space between the molecules increases. When the liquids are cooled they contract.

3. Liquids may dissolve some solids. When sugar is placed in water. It melts or dissolves. Sugar breaks up in the water and spread out.

4. Some liquids, like water, flow easily. Other liquids like oil flow very slowly. Liquids that flow very slowly are described as viscous.

Viscosity is the resistance of a liquid to flow. This is because the molecules in viscous material are strongly attached to each other.

• Gases

  In gases, the molecules are farther apart compared to those liquids. The molecules bounce off and move in every direction. The force of attraction between the molecules is too weak to hold them close.

Multiple Choice

What is anything that occupies space and has mass?

• force

• matter

• motion

• energy

Multiple Choice

Which is true about solids?

• Solids occupy space

• Solids ca not be seen.

• Solids do not have definite shape

• Solids follow the shape of their container

Multiple Choice

Which of these liquids will flow slowest when poured?

• juice

• water

• vinegar

• condensed milk

Multiple Choice

What are the characteristic of solids is shown when gold is made into rings and necklaces?

• strength

• malleability

• brittleness

• hardness