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Biology Final Review Crossword Puzzle

What gasses impede the escape of heat from Earth's surface?
What is half of the dry mass on Earth composed of?
What organelle is included in both plant and animal cells?
Which variable is the changing factor in an experiment?
What is the main source of energy for most life on Earth?
What type of graph is used to show continuing data?
What do you formulate when you make a prediction about the relationship between variables?
What type of graph is used to show relationships between groups?
What type of organism can produce its own food supply?
What is the last name of the scientist who discovered cells?