Synthetic materials from natural resources

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レッスンノート

Natural vs. Synthetic Materials

Natural materials come from nature or are made from something that occurs in nature.
Synthetic materials are made by mankind, often in a science lab.
A synthetic material with the same chemical structure as a natural one has the same properties.
Example: lab-created diamonds and mined diamonds are both made of carbon and have identical properties.
Synthetic insulin is chemically identical to natural insulin and functions the same in the body.
The only difference between natural and synthetic materials is the process used to make them.

Labels for cotton and merino wool, a sheep, yarn, and a wool sweater

Synthetic Materials from Natural Resources

Synthetic materials are derived from natural resources.
Example: plastic is mainly made from petroleum (oil), a natural resource.
Nylon and polyester are synthetic fabrics made from petroleum products.
Medicine from the Foxglove flower is a synthetic material made from a natural resource.
Synthetic materials can have new properties that change their function and uses.

A bottle of medicine capsules and the foxglove flower (Digitalis purpurea)

Properties and Uses of Synthetic Materials

Materials have properties like strength, flexibility, melting/boiling points, and conductivity.
Heat conductivity is how well a material conducts heat; electrical conductivity is how well it conducts electricity.
Synthetic fabrics are often lighter, water-resistant, and more durable than natural ones.
Nylon is strong and lightweight, used in ropes, fishing nets, tents, utensils, and parachutes.
Properties determine the function and use of a material.

Environmental Impact of Material Production

Every process to produce materials has an impact on the environment; some are small, others large.
Mining for metals and coal has devastating effects, including large holes and slag piles (crushed rock waste).
Coal mining and use in power stations have negative environmental impacts.
Paper making requires huge areas of land for tree plantations and factories cause pollution.
Plastics take a long time to decompose and can become hazards to organisms.
Fracking (injecting water at high pressure to release gas/oil) is a major environmental concern.

A tree plantation for paper and a paper-making factory

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練習問題

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1.A synthetic material is always made from natural resources.
Easy
True or false?
2.Natural resources are materials that have been made by humans in a laboratory.
Easy
True or false?
3.Synthetic insulin has the same chemical structure as natural insulin.
Easy
True or false?
4.Plastic is made from a natural resource called petroleum.
Easy
True or false?
5.Synthetic materials always have different properties than the natural resources they come from.
Easy
True or false?
6.All synthetic materials are made from petroleum.
Easy
True or false?
7.Nylon is a natural fiber produced by silkworms.
Easy
True or false?
8.The medicine made from the foxglove flower is an example of a synthetic material made from a natural resource.
Easy
True or false?

もっと問題

9.Synthetic materials are always cheaper to produce than natural resources.
Easy
True or false?
10.Synthetic fabrics are often lighter and can be treated to be water-resistant.
Easy
True or false?
11.Put the following steps in the correct order for making a synthetic material from a natural resource, starting with the natural resource.
Medium
- Obtain natural resource (e.g., petroleum)
- Change the structure of molecules
- Create a new material with new properties
- Use the new material for a function
12.Which of the following are natural resources used to make synthetic materials? (select all that apply)
Easy
- APetroleum
- BFoxglove flower
- CNylon
- DSilk
- ECotton
13.Why is synthetic insulin beneficial compared to insulin previously obtained from pigs?
Medium
- AIt has a different chemical structure that works better.
- BIt does not require large numbers of pigs to produce.
- CIt is made from a natural resource, not in a lab.
- DIt has different properties that are more effective.
14.A company advertises a new fabric as 'all natural'. Which of the following would be the best evidence that the fabric is truly natural?
Medium
- AIt is made from petroleum products.
- BIt is produced by silkworms and woven into cloth.
- CIt is manufactured in a laboratory.
- DIt has been treated to be water-resistant.
15.Which of the following is a disadvantage of using plastics as a synthetic material?
Medium
- AThey are expensive to produce.
- BThey take a long time to decompose.
- CThey are not strong enough for many uses.
- DThey cannot be made from natural resources.
16.Which of the following are examples of synthetic materials made from natural resources? (Select all that apply)
Medium
- ASynthetic insulin
- BCotton fabric
- CPlastic
- DWool
- EMedicine made from foxglove flower
17.Match each material to whether it is natural or synthetic.
Medium
- Cotton
- Wool
- Nylon
- Vitamin C tablets
- Oranges
- Natural
- Synthetic
18.Put the following steps in the correct order to show how synthetic insulin is produced, starting with the natural resource.
Medium
- Scientists develop a lab process to make insulin
- Natural insulin is obtained from pigs
- Synthetic insulin is injected into people with diabetes
- The chemical structure of insulin is studied
19.A student wants to compare the properties of a synthetic fabric (nylon) with a natural fabric (cotton) to determine which is more suitable for a raincoat. Which of the following experimental procedures would best test this?
Medium
- AMeasure the mass of equal-sized samples of each fabric and compare their densities.
- BPlace equal-sized samples of each fabric over a beaker of water and observe how long it takes for water to pass through.
- CHeat equal-sized samples of each fabric and measure their melting points.
- DStretch equal-sized samples of each fabric and measure their length before breaking.
20.A company produces a synthetic material from a natural resource. To reduce the environmental impact of production, which of the following strategies would be most effective?
Hard
- AUse more of the natural resource to increase yield.
- BUse renewable energy sources in the production process.
- CIncrease the temperature of the production process to speed up reaction.
- DDispose of waste products in a nearby river to save costs.
21.A lab-created diamond and a mined diamond have the same chemical structure and properties. Which of the following statements best explains why the lab-created diamond costs about 30% less?
Medium
- ALab-created diamonds are made of a cheaper material.
- BThe process of mining natural diamonds is expensive and has high environmental costs.
- CLab-created diamonds have more flaws.
- DMined diamonds are larger.
22.Fracking is a process used to release gas and oil from underground rock by injecting water at high pressure.
Easy
True or false?
23.The production of synthetic materials always has a negative impact on the environment.
Medium
True or false?
24.Match each material with its source (natural resource or natural product):
Medium
- Nylon
- Cotton
- Plastic
- Petroleum
- Plant
- Petroleum
25.Which of the following is a natural fiber?
Easy
- ANylon
- BPolyester
- CCotton
- DPlastic
26.Which of the following is a synthetic material made from petroleum?
Easy
- ACotton
- BWood
- CNylon
- DSilk
27.A lab-created diamond costs about what percentage less than a mined diamond with the same properties?
Easy
28.A mined diamond costs $2000. If a lab-created diamond with the same properties costs about 30% less, what is its approximate cost? (Give your answer in dollars, rounded to the nearest dollar.)
Easy
29.Complete the sentence about the properties of synthetic materials.
Easy
If a synthetic material has the same ____ as a naturally occurring material, they have the same properties.
30.Complete the sentence about the origin of synthetic materials.
Easy
Synthetic materials are made from ____ resources.
31.Name one natural fiber used to make clothing.
Easy
32.Explain how the production of synthetic materials can have both positive and negative impacts on society and the environment. Use an example from the source.
Hard
33.Describe an experiment you could carry out to compare the durability of a natural fabric (cotton) and a synthetic fabric (nylon).
Medium
34.A lab-created diamond costs about what percentage less than a mined diamond with the same properties?
Easy
- A30 %
- B36 %
- C33 %
- D27 %
35.A mined diamond costs $2000. If a lab-created diamond with the same properties costs about 30% less, what is its approximate cost? (Give your answer in dollars, rounded to the nearest dollar.)
Easy
- A1680 $
- B1400 $
- C1540 $
- D1260 $
36.Two nutrition labels are shown. Label 1's ingredients list reads "Pure Maple Syrup." Label 2's ingredients list reads "Corn syrup, high fructose corn syrup, water, cellulose gum, caramel color, salt, natural and artificial flavor, sodium benzoate and sorbic acid, sodium hexametaphosphate." Which statement best explains why the syrup on Label 2 is a synthetic material rather than a natural one?
Medium
- AIts serving size has more calories than the serving size on Label 1.
- BIts container holds more servings than the container for Label 1.
- CIt does not need to be refrigerated after opening.
- DIts ingredients are natural resources that have been chemically combined and processed to make the syrup.

復習ノート

## Synthetic Materials from Natural Resources ### Key Idea Synthetic materials (like plastics, medicines, and fuels) are **made from natural resources** by changing their structure through processing. The **processing–structure–properties–performance** paradigm explains how we design materials for specific uses. ### How It Works - **Natural resources** (e.g., crude oil, plants, minerals) are raw materials. - **Processing** (e.g., heating, mixing, chemical reactions) changes the **structure** of the material at atomic/molecular levels. - **Structure** determines **properties** (e.g., strength, flexibility, conductivity). - **Properties** control **performance** in real-world applications. ### Examples - **Plastics**: Made from petroleum (natural resource) through polymerization. Properties: lightweight, moldable, durable. Used in bottles, bags, toys. - **Medicines**: Many drugs are synthesized from plant compounds or other natural sources. Processing refines and modifies molecules for medical effects. - **Fuels**: Gasoline and diesel are refined from crude oil. Biodiesel comes from plant oils. ### Impacts on Society & Environment - **Benefits**: New materials improve life (e.g., medical implants, lightweight cars save fuel). - **Challenges**: Processing can cause pollution, use energy, and deplete resources. Some synthetic materials (like plastics) create waste that doesn't decompose easily. - **Responsibility**: Engineers and scientists aim to design materials that are effective and sustainable. ### Key Concepts - **Materials science**: Study of how structure affects properties, and how to design materials. - **Three main classes**: Metals, ceramics, polymers. Synthetic materials often fall into polymers (plastics) or composites. - **Structure matters**: Atomic arrangement and microscopic features determine behavior (e.g., diamond vs. graphite both are carbon but different structures give different hardness). ### Remember - Synthetic ≠ artificial in a bad way; it means human-made from natural starting materials. - The same natural resource can yield many different synthetic materials depending on processing. - Always consider both benefits and environmental costs.

Synthetic material: A material made by humans from natural resources through chemical or physical processing, e.g., plastic from petroleum.
Natural resource: Raw material obtained from nature (e.g., crude oil, wood, minerals) used to make synthetic materials.
Processing–structure–properties–performance paradigm: A framework in materials science: processing changes structure, structure determines properties, and properties control performance in use.
Polymer: A large molecule made of repeating subunits; many synthetic materials (e.g., plastics) are polymers.
Materials science: The study of how the structure of a material relates to its properties, and how to design materials for specific applications.

フラッシュカード

What is a synthetic material?

A synthetic material is a human-made substance created by chemically changing natural resources. Examples include plastics, medicines, and fuels.

Give three examples of synthetic materials mentioned in the standard.

Plastics, medicines, and fuels.

What is the source of synthetic materials?

Synthetic materials are made from natural resources, such as oil, plants, or minerals, through chemical processing.

How does processing affect the structure of a material?

Processing determines the internal structure of a material, including atomic arrangements and microscopic features, which in turn influence its properties.

What is the processing–structure–properties–performance paradigm?

It describes how processing determines structure, structure determines properties, and properties control the performance of a material in service.

Why is materials science considered interdisciplinary?

It combines elements of chemistry, physics, and engineering to understand the relationships between a material's structure, properties, and performance.

What are the three main classes of materials?

Ceramics, metals, and polymers.

Give an example of a synthetic polymer and its natural resource.

Plastic (polymer) is often made from petroleum, a natural resource.

How can the production of synthetic materials impact society?

It can provide useful products like medicines and fuels, but may also cause pollution or resource depletion.

How can the production of synthetic materials impact the environment?

Processing natural resources can release pollutants, consume energy, and generate waste, affecting ecosystems and climate.

What is a natural resource?

A natural resource is a material found in nature, such as oil, wood, or minerals, that can be used to make synthetic materials.

What does MS-PS1-3 standard require students to understand?

Students should understand how synthetic materials are made from natural resources and the impacts of their processing on society and the environment.

What is the role of chemistry in making synthetic materials?

Chemistry is used to change the molecular structure of natural resources to create new materials with desired properties.

Why are synthetic materials important?

They provide many useful products that improve daily life, such as plastics, medicines, and fuels, but their production must be managed responsibly.

What is the difference between a natural material and a synthetic material?

A natural material occurs in nature, while a synthetic material is human-made by chemically altering natural resources.

How does the structure of a material affect its properties?

The internal structure, from atomic arrangement to microscopic features, determines mechanical, electrical, thermal, and optical properties.

What is an example of a synthetic medicine made from a natural resource?

Aspirin is a synthetic drug originally derived from willow bark, a natural resource.

What is the significance of the Space Race in materials science?

It drove the development of metallic alloys, silica, and carbon materials used in space vehicles, advancing synthetic materials.

What are nanomaterials?

Nanomaterials are advanced materials with structures at the nanoscale, often synthetic, with unique properties.

How do computer simulations help in materials science?

They are used to find new materials, predict properties, and understand phenomena, aiding the design of synthetic materials.

What is the definition of a material in materials science?

A material is a substance (usually solid) intended for certain applications, and it can be natural or synthetic.

What are biomaterials?

Biomaterials are materials designed to interact with biological systems, often synthetic, used in medical implants or devices.

Why is it important to consider the full life cycle of a synthetic material?

Because the extraction, processing, use, and disposal of synthetic materials have environmental and social impacts that must be evaluated.

What is a polymer?

A polymer is a large molecule made of repeating subunits, many synthetic polymers are plastics.

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