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Here is a resource with a descriptive approach to explaining the scientific method. It's simple, but effective for both introduction and reinforcement of this concept. 

In this life science GED instructional activity, students complete a crossword puzzle given 9 clues about structures of the nervous system, the circulatory system, evolution, the digestive system, molecules and fossils. Students are...

In this GED vocabulary learning exercise, students complete a crossword puzzle given 10 clues about genetics and cloning, food chains, vaccines, the brain and the nervous system and organisms. Students are given a word bank to use to...

In this life science vocabulary learning exercise, students complete a crossword puzzle using 10 given clues about various topics of life science such as natural selection, cell structures and function and components of the body systems....

In this life science worksheet, students complete a crossword puzzle given nine clues and nine terms. Topics include systems of the body and their structures, cloning, photosynthesis and denitrification.

In this life science activity, students complete a crossword puzzle given eight clues about and a word bank about cloning, evolution, the human brain, photosynthesis and the respiratory system.

In this earth and space science activity, students complete a crossword puzzle given seven clues and seven terms about earthquakes, the solar system, and convection currents.

In this earth and space science GED worksheet, students complete a crossword puzzle given 7 clues about topics such as earthquakes, the Milky Way Galaxy and weathering and erosion. Students are given a word bank to use to complete the...

In this GED life science worksheet, students complete a crossword puzzle given 8 clues about cell division, genetics, and the human body systems.

In this earth and space science worksheet, students complete a crossword puzzle given nine terms related to earthquakes, glaciers, the solar system, and sources of energy.

In this earth and space science worksheet, students complete a crossword puzzle given 9 clues and a word bank on topics such as sea floor spreading, tectonic plates, faults, lava and the big bang theory.

In this earth and space science instructional activity, students complete a crossword puzzle given 7 clues and a word bank on topics such as glaciers, weathering and population density.

In this life science learning exercise, students review terms such as genetics, mutation, trait, predator, and herbivore by completing 8 questions in this crossword puzzle.