Across
- 2. A complex network of interconnected feeding pathways showing how multiple organisms depend on one another.
- 4. A measure of how acidic or alkaline the water or ground is, affecting the survival of sensitive organisms.
- 5. An organism that cannot make its own food and must feed on plants or other animals to obtain energy.
- 7. A linear series showing the single pathway of energy transfer as one organism feeds on another.
- 10. An animal that is hunted, caught, and killed by another animal as a food source.
- 11. A mixture of gases providing oxygen for respiration and carbon dioxide for plants to make food.
- 12. The earth layer providing anchorage, water, and mineral salts for plants, and shelter for earthworms.
- 14. A special characteristic that helps an organism survive and reproduce in its specific environment.
- 17. A green plant that captures light energy to make its own food, forming the base of every food chain.
- 18. A group of organisms of the same kind living and reproducing together in a specific habitat at the same time.
- 19. The specific place where an organism lives, reproduces, and finds shelter, food, and water to survive.
- 20. An organism that breaks down dead organic matter, returning simple mineral nutrients back into the soil.
- 21. The gradual rise in Earth's temperature caused by excessive heat trapped by greenhouse gases from burning fuels.
- 22. The large-scale clearing of forested land, leading to soil erosion and a loss of natural habitats.
- 23. The primary natural source of light and heat energy needed by green plants to carry out food production.
Down
- 1. Different populations of living things living together and interacting with one another in the same habitat.
- 3. An action or way an organism reacts to its surroundings to survive, like hibernating or migrating.
- 6. The collective physical and living surroundings that affect the growth, survival, and development of an organism.
- 8. A single, distinct living individual, such as a specific plant, animal, fungus, or microscopic bacterium.
- 9. A physical factor referring to the saltiness of water, determining if freshwater organisms can survive.
- 10. The introduction of harmful materials into the land, air, or water, damaging the health of ecosystems.
- 13. A vital liquid required by all living things to carry out life processes and prevent dehydration.
- 15. A physical factor measuring the degree of hotness, affecting the activity and survival of living things.
- 16. A physical body feature that helps an organism survive, like webbed feet for swimming or thick fur.
- 17. An animal that hunts, catches, and kills other animals for food to obtain its energy.