A common synthetic material that is found almost everywhere is ________.

• Coal
• Lumber
• Plastic
• Aerogel

When two substances combine to form a new substance, a _____ has occurred.

• chemical reaction
• physical reaction
• mixture
• solution

_______ is an example of a synthetic fabric.

• Wool
• Silk
• Cotton
• Nylon

Synthetic materials are made by _________.

• aliens
• humans
• farmers
• nature

Plastics are made from ___________ ________ like crude oil or fracked natural gas.

• fossil watches

• funny fuels

• farming fuels

• fossil fuels

Failing to recycle plastics can lead to _________.

• renewable materials
• pollution
• extra bottles around the house
• new materials

What is the problem with plastics?     

• Plastics are made from petroleum or natural gas.

• In plastics, elements are put together in molecular chains that are not found in nature and cannot be broken down by microorganisms.

• All of the mentioned

• Some plastics may accumulate and last for hundreds or even thousands of years.

One problem with landfills is the liquid that forms when water seeps down through a landfill and collects dissolved chemicals from decomposing garbage. This is called leachates. WHAT IS THIS PROBLEM CALLLED? HINT! Reread the question!

• ash

• sediment

• sludge

• leachates

What are some advantages of synthetic materials?

• Cheaper to manufacture 
• Stronger than similar products made from natural material
• Often better quality 
• All of the above

What is the difference between a natural and synthetic material?

• Natural material is made from chemicals and synthetic is made from nature
• Natural material is made directly from nature and synthetic material is made from chemicals
• Natural material is made from petroleum and synthetic material is made from wool
• Natural material is made from trees and synthetic materials are made from plastics