Puzzle 1

4. Stored energy that has the potential to do work.
5. The ability to do work or cause a change; it exists in various forms.
8. Organelle in plant cells where photosynthesis takes place, containing chlorophyll.
9. Energy associated with the motion of an object.
10. The basic unit of a chemical element.
11. The interactions among living organisms and their physical environment in a particular area.
12. Small gland, often called the "master gland," located at the base of the brain.
14. Mixtures of metals that often have enhanced properties.
17. System of glands that release hormones into the bloodstream to regulate various bodily functions.
19. Substances that change color in the presence of certain conditions, often used in chemical tests.

1. A group of individuals of the same species living in a specific area.
2. Energy released during nuclear reactions, both fusion and fission.
3. The ability of a material to stretch without breaking.
6. A substance composed of atoms with the same number of protons.
7. The force that attracts or repels objects due to the arrangement of atoms and their electrons.
13. The quality of being accessible or obtainable.
15. These glands produce hormones like adrenaline, crucial for the body's fight-or-flight response.
16. A substance formed when two or more elements chemically combine in fixed ratios.
18. Force of attraction between objects with mass; it gives weight to physical objects.