Across
- 2. water stored below Earth's surface in soil and rock layers
- 6. the system of the body that carries information to all parts of the body: The nervous system relies on nerve cells to move electrical signals to the body from the brain, and from the body to the brain and/or spinal cord.
- 10. the process in which a cell splits in two; part of the process in which cells reproduce
- 13. that part of Earth in which life can exist
- 17. consisting of many cells
- 18. the average weather conditions in an area
- 20. a working system that is part of a larger system
- 22. organs of the respiratory system that bring oxygen-rich air into the body and send oxygen-poor air out of the body
- 23. an organelle in eukaryotic cells that is the site of cellular respiration and generates most of the cell’s ATP
- 25. a tiny structure within a cell that performs a specific function for that cell
- 26. the layers of gasses that surround a planet
- 29. a group of parts that work together to function or perform a task
- 30. the body system that permits movement and locomotion in animals
- 31. the body system that delivers blood to different parts of a body; consists of the heart, blood, and blood vessels (related word: circulatory system)
- 32. the transfer of thermal energy
- 33. an organelle in a plant cell that turns energy from the sun into chemical energy for the plant to use
Down
- 1. all of the water on, under, and above the Earth
- 3. a group of seven organs that break down food and absorb the nutrients which the body then uses for fuel
- 4. The kind of action or activity specific to a thing or person.
- 5. a stiff structure that surrounds and protects a cell; found in plant, fungus, and some bacteria cells
- 7. the process that occurs when the chemical energy of "food" molecules, carbohydrates, fats, and proteins, is released and partially captured in the form of adenosine triphosphate (ATP)
- 8. Earth's crust, both beneath the oceans and continents, as well as the mantle and inner and outer core
- 9. the boundary that surrounds a cell and controls which substances can enter or leave the cell
- 11. the network of solid materials that give an organism's body its structure
- 12. the basic unit of all living things
- 14. dispersion of substances in a gas or liquid
- 15. an organelle in a cell that holds the cell’s DNA
- 16. the process by which the body breaks down food so that it can be used for energy (related word: digest)
- 17. a simulation of a real thing or process
- 19. water that is not salty, such as that found in streams and lakes
- 21. the system that transports blood and other fluids throughout the body
- 24. the system of the body that brings oxygen into the body and releases carbon dioxide
- 27. the system of the body responsible for storing and getting rid of waste products, such as urine
- 28. having complex cells in which the genetic material is contained inside a nucleus