Across
- 3. a series of living things in which each uses the one below it as a food source.
- 7. a tiny structural unit in an organism typically consisting of cytoplasm and organelles. In animals they are enclosed by a membrane and in plants by a cell wall.
- 10. an animal that has a backbone. Mammals birds fish reptiles and amphibians are all examples.
- 13. water that falls from the sky to the ground as rain snow sleet or hail.
- 16. the part of a plant that grows underground. They get water and holds the plant in place.
- 18. a large group of stars and matter held together by gravity.
- 20. the series of changes a living thing passes through.
- 21. the rocky outer layer of a planet or moon; the layer of the Earth above the mantle.
- 22. an influence or power that can cause a change in an object or system.
- 25. heat or light energy sent out in the form of waves. Some forms can be dangerous.
- 27. to arrange something into groups according to similarities.
- 28. the process act or result of changing place or position.
- 29. a form of energy created by motion.
- 30. any audible vibration; anything that is heard.
- 32. the movement of small pieces of rock or sediment due to wind water gravity and other natural forces.
- 33. the usual weather of a certain area.
- 34. a group of all organisms and their environment.
- 35. a simple machine in which a wheel or set of wheels is used with a rope or chain to lift heavy objects.
- 36. a part of a chromosome in a cell that controls a particular characteristic such as height or eye color. They are passed from parents to their offspring.
Down
- 1. water that falls from the sky to the ground as rain snow sleet or hail.
- 2. to change from a gas or vapor to a liquid.
- 4. an object such as a piece of iron or steel that has the ability to attract certain metals. They may be naturally occurring or manufactured.
- 5. of rocks formed from sediments deposited by water or air.
- 6. a tropical cyclone storm that forms in the Atlantic and Northeast Pacific Oceans bringing winds over 74 miles per hour rain thunder and lightning.
- 8. the passing on of genetic traits from parents to children or offspring.
- 9. the curved form some types of energy such as heat light and sound take as they move through space.
- 11. a shaking of part of the Earth's surface.
- 12. the physical substance that everything is made of.
- 14. molten rock that erupts from a volcano or vent; also the solid rock that forms when this substance cools.
- 15. the collection of planets and their moons along with other celestial bodies that orbit the sun. Also a similar system orbiting a different star.
- 17. composed of more than one element ingredient or part.
- 19. in the electromagnetic spectrum the invisible waves next to violet light that have shorter wavelengths than those of violet light. This type of ray can cause suntan and sunburn.
- 23. in biology changes that happen over time in the gene pool of a population.
- 24. a measurement of the amount of matter something has.
- 26. an animal that lacks a backbone.
- 30. the system that provides structure and support to the body stores minerals creates blood cells protects your internal organs and helps the body move.
- 31. fuel that contains carbon and that is formed in the Earth over millions of years from plant and animal remains. Oil and natural gas are examples.