Making Synthetic Materials - Middle School Physical Science
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What is the main purpose of fractional distillation when processing crude oil?
What is the main purpose of fractional distillation when processing crude oil?
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To separate crude oil into fractions by different boiling points. Components vaporize at different temperatures, allowing separation.
To separate crude oil into fractions by different boiling points. Components vaporize at different temperatures, allowing separation.
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What natural resource is the primary feedstock for making ammonia in the Haber process?
What natural resource is the primary feedstock for making ammonia in the Haber process?
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Natural gas (methane) as a source of hydrogen. Methane provides the hydrogen atoms needed for ammonia synthesis.
Natural gas (methane) as a source of hydrogen. Methane provides the hydrogen atoms needed for ammonia synthesis.
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What is the Haber process mainly used to produce for synthetic fertilizers?
What is the Haber process mainly used to produce for synthetic fertilizers?
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Ammonia, $NH_3$. This nitrogen compound is essential for plant growth.
Ammonia, $NH_3$. This nitrogen compound is essential for plant growth.
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What term describes a reaction that releases energy as heat during manufacturing?
What term describes a reaction that releases energy as heat during manufacturing?
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Exothermic reaction. Energy is released to surroundings, often requiring cooling.
Exothermic reaction. Energy is released to surroundings, often requiring cooling.
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What is a catalyst, and what does it do in industrial chemical manufacturing?
What is a catalyst, and what does it do in industrial chemical manufacturing?
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A substance that speeds reactions without being consumed. Lowers activation energy, making reactions faster and more efficient.
A substance that speeds reactions without being consumed. Lowers activation energy, making reactions faster and more efficient.
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Identify the correct balanced equation for making ammonia in the Haber process.
Identify the correct balanced equation for making ammonia in the Haber process.
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$N_2 + 3H_2 \rightarrow 2NH_3$. Nitrogen and hydrogen combine in a 1:3 ratio to form ammonia.
$N_2 + 3H_2 \rightarrow 2NH_3$. Nitrogen and hydrogen combine in a 1:3 ratio to form ammonia.
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Which property change best indicates polymerization occurred: color change or new long-chain molecules formed?
Which property change best indicates polymerization occurred: color change or new long-chain molecules formed?
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New long-chain molecules (polymers) formed. Polymer formation creates new molecular structures, not just appearance changes.
New long-chain molecules (polymers) formed. Polymer formation creates new molecular structures, not just appearance changes.
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Identify the correct sequence for making plastic from crude oil, from start to finish.
Identify the correct sequence for making plastic from crude oil, from start to finish.
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Distillation → cracking → monomers → polymerization → plastic product. Each step transforms molecules closer to final plastic product.
Distillation → cracking → monomers → polymerization → plastic product. Each step transforms molecules closer to final plastic product.
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What is the key idea of conservation of mass during chemical processing of materials?
What is the key idea of conservation of mass during chemical processing of materials?
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Total mass of reactants equals total mass of products. Atoms rearrange but are never created or destroyed.
Total mass of reactants equals total mass of products. Atoms rearrange but are never created or destroyed.
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Which statement best distinguishes a polymer from a monomer?
Which statement best distinguishes a polymer from a monomer?
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A polymer is a long chain; a monomer is a single building-block molecule. Polymers contain many monomers linked together.
A polymer is a long chain; a monomer is a single building-block molecule. Polymers contain many monomers linked together.
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Which type of change forms new substances: physical change or chemical change?
Which type of change forms new substances: physical change or chemical change?
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Chemical change. New substances form when atoms rearrange into different molecules.
Chemical change. New substances form when atoms rearrange into different molecules.
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What term describes a reaction that absorbs energy and often needs heating?
What term describes a reaction that absorbs energy and often needs heating?
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Endothermic reaction. Energy input is required to break bonds and form products.
Endothermic reaction. Energy input is required to break bonds and form products.
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Which process converts crude oil into smaller useful molecules used to make plastics?
Which process converts crude oil into smaller useful molecules used to make plastics?
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Cracking. Breaks large hydrocarbon molecules into smaller, more useful ones.
Cracking. Breaks large hydrocarbon molecules into smaller, more useful ones.
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Which fossil-fuel-based natural resource is the most common feedstock for many plastics?
Which fossil-fuel-based natural resource is the most common feedstock for many plastics?
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Petroleum (crude oil). Contains hydrocarbons that serve as building blocks for plastics.
Petroleum (crude oil). Contains hydrocarbons that serve as building blocks for plastics.
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What is polymerization in the production of synthetic materials such as plastics?
What is polymerization in the production of synthetic materials such as plastics?
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A chemical reaction that links monomers together to form polymers. Monomers chemically bond to create long-chain molecules.
A chemical reaction that links monomers together to form polymers. Monomers chemically bond to create long-chain molecules.
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What is a chemical process, as used to transform a natural resource into a new material?
What is a chemical process, as used to transform a natural resource into a new material?
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A reaction or series of reactions that changes substances into new ones. Rearranges atoms to create products with different properties.
A reaction or series of reactions that changes substances into new ones. Rearranges atoms to create products with different properties.
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What is a natural resource in the context of making synthetic materials?
What is a natural resource in the context of making synthetic materials?
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A raw material from Earth used as a starting chemical feedstock. These materials are chemically processed to create synthetic products.
A raw material from Earth used as a starting chemical feedstock. These materials are chemically processed to create synthetic products.
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What is a synthetic material, in terms of how it is produced from natural resources?
What is a synthetic material, in terms of how it is produced from natural resources?
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A human-made material produced by chemical processing of natural resources. Chemical reactions transform raw materials into new substances.
A human-made material produced by chemical processing of natural resources. Chemical reactions transform raw materials into new substances.
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What term describes small molecules that can chemically link to form plastics?
What term describes small molecules that can chemically link to form plastics?
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Monomers. These small units bond together to form long polymer chains.
Monomers. These small units bond together to form long polymer chains.
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What is a polymer, in terms of structure and how it is formed?
What is a polymer, in terms of structure and how it is formed?
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A long chain molecule made by joining many repeating monomer units. Like beads on a string, monomers connect in repeating patterns.
A long chain molecule made by joining many repeating monomer units. Like beads on a string, monomers connect in repeating patterns.
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What is a polymer?
What is a polymer?
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A large molecule made of repeating monomer units. Long chains formed when monomers bond repeatedly.
A large molecule made of repeating monomer units. Long chains formed when monomers bond repeatedly.
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What is polymerization?
What is polymerization?
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A reaction that links many monomers to form a polymer chain. Monomers chemically bond together forming long chains.
A reaction that links many monomers to form a polymer chain. Monomers chemically bond together forming long chains.
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What is cross-linking in polymers?
What is cross-linking in polymers?
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Forming bonds between polymer chains to make a stronger network. Creates 3D networks that increase strength and rigidity.
Forming bonds between polymer chains to make a stronger network. Creates 3D networks that increase strength and rigidity.
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Which polymer type is typically remeltable and reshaped when heated?
Which polymer type is typically remeltable and reshaped when heated?
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Thermoplastic. Linear chains allow melting and reshaping multiple times.
Thermoplastic. Linear chains allow melting and reshaping multiple times.
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Which polymer type typically hardens permanently after curing due to cross-links?
Which polymer type typically hardens permanently after curing due to cross-links?
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Thermoset. Cross-linked structure prevents remelting once formed.
Thermoset. Cross-linked structure prevents remelting once formed.
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