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Science Crossword Puzzle: Week #5

A product that comes from trees and is used to build things and make paper
The process by which plants create the energy that they need to grow
A chemical inside the cells of a plant that helps in photosynthesis and gives most plants their green color
The name that Carl Linnaeus gave to the world of plants
Long, broad parts of plants that gather light for photosynthesis
The last name of a Swedish scientist who created categories for all living things
A gas produced as a left-over product of animals breathing
A gas produced as a left-over product of plants processing energy