Puzzle 20: Living Together

2. The collective physical factors and living surroundings that directly affect the survival and growth of an organism.
4. A green plant that captures sunlight to make its own food, forming the base of every feeding relationship.
5. The total number of individuals of a single species in an area, which drops if their food source decreases.
6. A condition that occurs when too many organisms live in a small space, increasing struggle for resources.
8. Different populations of living things living together and interacting with one another in the same area.
10. An environmental condition measuring hotness that drops at night, affecting how fast an organism loses water.
13. A non-living environmental variable like salinity or acidity that determines what types of organisms can live there.
16. The amount of water vapor or dampness present in soil or air, which is a critical need for woodlice to survive.
18. What happens when different organisms struggle against each other for limited resources like food, water, or space.
20. The specific place that provides an organism with its shelter, water, and food to survive and reproduce safely.

1. A relationship where different living things rely on each other for food, transport of seeds, or shelter.
3. Organisms have special body features or behaviors that help them __________ in their specific environmental conditions.
7. A single linear pathway that shows the transfer of energy from one feeding organism to the next.
9. A single, distinct living individual, such as a specific plant, mammal, fungus, or microscopic bacterium.
11. An organism that breaks down dead organic matter, returning vital mineral nutrients back into the soil.
12. A group of organisms of the same kind living and reproducing together in a specific area at the same time.
13. An animal that is hunted, killed, and eaten by another animal in a feeding relationship.
14. An organism that cannot make its own food and must feed on other living things to get energy.
15. An environmental variable that directly affects how quickly green plants can carry out food production under a lamp.
17. A complex network of interconnected feeding pathways showing how different living populations depend on each other.
19. An animal that catches, kills, and feeds on another animal to obtain its source of energy.