7th Grade Science Vocabulary

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Across
  1. 3. the theory that states that all living things are made of one or more cells, the cell is the smallest unit of life, and all new cells come from preexisting cells
  2. 4. the system of organs and tissues, including the heart, blood, blood vessels, lymph, lymphatic vessels, and lymph glands, involve in circulating blood and lymph through the body
  3. 7. the system by which ingested food is acted upon by physical and chemical means to provide the body with absorbable nutrients and to excrete waste products
  4. 12. a group of different tissues working together to perform a particular job
  5. 13. created when sediment (rock broken into smaller pieces or dissolved in water) is deposited
  6. 14. a group of organs that work together to perform a particular job
  7. 15. the partially melted portion of the mantle below the lithosphere
  8. 16. created when magma or lava cools and crystallizes
  9. 17. the dense metallic center of the Earth (inner core and outer core)
  10. 18. cells that do not have a membrane around the genetic material (DNA), grow into unicellular organisms, and do not have many cell parts found in other cells
Down
  1. 1. the rigid outermost layer of Earth that includes the uppermost mantle and crust
  2. 2. the process by which cells or tissues change from relatively generalized to specialized kinds during development
  3. 5. the process during which the cytoplasm and its contents divide
  4. 6. created when rocks are exposed to extreme temperature and pressure, such as along plate boundaries
  5. 8. cells that have a membrane around the genetic material (DNA), often grow into multicellular organisms, and have organelles with specialized functions
  6. 9. the thick middle layer in the solid part of the Earth
  7. 10. a group of similar types of cells that work together to carry out specific tasks
  8. 11. the process during which the cell's nucleus and its contents divide
  9. 16. a diffuse, complex network of interacting cells, cell products, and cell-forming tissues that protects the body from pathogens and other foreign substances, destroys infected and malignant cells, and removes cellular debris
  10. 19. the brittle, rocky, outer layer of Earth