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Material Properties and Purposes

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- Some materials have properties best suited for certain purposes.
- In this lesson we will learn about stretchiness, absorbency and strength.
- Comparing different materials involves doing experiments.
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Discussion Questions
- Before VideoWhat kinds of materials have the property of being stretchy?ANSWER
Rubber bands, bungee cords and balloons are all stretchy.
Paper towels, sponges, diapers and towels can all absorb liquid.
Metal, wood and bricks are examples of strong materials.
Since a bridge needs to hold up a lot of weight, it is best to choose a strong material such as metal or concrete.
It’s not strong enough. It’s not water or weather proof.
Test each material to see which one makes the object go the farthest.
- After VideoWhy is pizza not a good choice for building a chair?ANSWER
It’s not strong enough to hold a person up. It will just collapse when you sit on it.
You could test each material by seeing which one absorbed the most liquid.
The sign is brightly colored so that people see it.
If it wasn’t stretchy you wouldn’t bounce back up. It also allows you to slow down safely.
A raincoat, umbrella and a house should not be absorbent.
They need to choose the right materials based on the purpose of what they build.
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Vocabulary
- Property DEFINE
A quality of a material.
- Purpose DEFINE
What something is used for.
- Flexibility DEFINE
How easily something can bend.
- Strength DEFINE
How strong something is.
- Stretchiness DEFINE
How easily something can be pulled apart and returned back to its original shape.
- Absorbency DEFINE
How well something can soak up a liquid like water.
- Property DEFINE
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Reading Material
Download as PDF Download PDF View as Seperate PageMATERIAL PROPERTIES DEFINITIONA property is a quality of something like strength, stretchiness or absorbency. Materials have properties that help them serve specific purposes. For example, a chair is made of metal or wood because it is strong.
To better understand material properties and their purpose…
MATERIAL PROPERTIES DEFINITION. A property is a quality of something like strength, stretchiness or absorbency. Materials have properties that help them serve specific purposes. For example, a chair is made of metal or wood because it is strong. To better understand material properties and their purpose…LET’S BREAK IT DOWN!
Different materials have different properties.
Metal is strong and not stretchy. Fabric is soft and stretchy. Since these two materials have different properties they are useful for different purposes.
Different materials have different properties. Metal is strong and not stretchy. Fabric is soft and stretchy. Since these two materials have different properties they are useful for different purposes.A bridge is made of strong material such as metal.
This helps it hold up lots of heavy cars and trucks. Other materials that are strong include wood and concrete. Many buildings are made of these strong materials.
A bridge is made of strong material such as metal. This helps it hold up lots of heavy cars and trucks. Other materials that are strong include wood and concrete. Many buildings are made of these strong materials.A bungee cord is made of stretchy material.
This helps it to serve its purpose so that the jumper can slow down safely after they jump. It is also important for a sock to be stretchy so when you put it on it does not rip.
A bungee cord is made of stretchy material. This helps it to serve its purpose so that the jumper can slow down safely after they jump. It is also important for a sock to be stretchy so when you put it on it does not rip.The main purpose of a diaper is to absorb liquids.
That’s why it is made of a super absorbent material to help parents clean up a baby’s mess. Other materials that need to be absorbent are sponges and paper towels.
The main purpose of a diaper is to absorb liquids. That’s why it is made of a super absorbent material to help parents clean up a baby’s mess. Other materials that need to be absorbent are sponges and paper towels.A raincoat has many properties that serve its purpose.
The important property is that it is not absorbent. This is important to keep the person wearing it dry. It is also flexible so it can be comfortable to wear.
A raincoat has many properties that serve its purpose. The important property is that it is not absorbent. This is important to keep the person wearing it dry. It is also flexible so it can be comfortable to wear. -
DIY Activity Guide
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