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Across 2. the ________ of an earthquake is the point on the Earth's surface directly above an earthquake's starting point (Fact 135) 6. producers are organisms that use _______ to make their own food through a process called photosynthesis (Fact 147) 8. the ______ is a medium sized star made mostly of hydrogen and helium (Fact 29 9. ________ is the condition of Earth's atmosphere at a certain time and in a certain place (Fact 111) 11. __________ such as plants, algae and some bacteria are the source of all the food in an ecosystem (Fact 148) 13. All of the outer planets are known as ____ ______ meaning they do not have solid surfaces. (Fact 57) 15. ________ waves are waves of energy that travel through the Earth (Fact 134) 16. organisms in an ecosystem are divided into three groups based on how they obtain _____ (Fact 145) 17. an _______ _____ is a diagram shaped liked a triangle showing the loss of energy at each level of the food chain (Fact 153) 19. ________ is the average long term conditions of temperature, precipitation, winds, and clouds in an area (Fact 112) 20. a ________ is a naturally formed inorganic solid with a crystalline structure (Fact 100) 21. a _______ ______ is a diagram that shows the transfer of energy from one organism to the next (Fact 152) 22. ________ or life science is the study of living things (Fact 154) 23. _______ are small bodies of water, ice, and dust left over from the formation of the solar system (Fact 66)

Down 1. the ______ of an earthquake is the point inside the Earth where the earthquake begins (Fact 136)) 3. ___________ are organisms that eat producers or other organisms for energy (Fact 149) 4. ______ _____ is a theory that Earth's lithosphere is broken into plates that move around (Fact 129) 5. The _______ ________ is the galaxy we live in and is a spiral galaxy. (Fact 77) 7. The four outer planets are Jupiter, _______, Uranus and Neptune (Fact 56) 10. Meteorology is the study of Earth's atmosphere (Fact 81) 12. __________ are organisms that break down the remains of dead organisms for energy (Fact 150) 14. the four inner or _______ planets are Mercury, Venus, Earth and Mars (Fact 33) 18. a ______ ______ is a diagram that shows the many energy pathways in an ecosystem (Fact 151)