Across
- 4. Special proteins that speed up digestion by breaking down large food molecules into smaller ones
- 5. Essential nutrients needed in small amounts for good health; found in fruits and vegetables
- 7. A pure substance made up of only one type of atom that cannot be broken down into simpler substances
- 12. A light-dependent resistor that changes its resistance based on the amount of light it receives
- 13. A type of switch that opens or closes a circuit when a magnet is brought near it, used in security alarms
- 16. A type of logic gate that only allows an output when both input signals in a circuit are switched on
- 19. An essential nutrient needed for muscle growth and repair; found in meat, fish, and nuts
- 20. A long, coiled organ in the digestive system that absorbs nutrients from food into the bloodstream
- 21. Important nutrients required for body functions like strong bones and teeth; calcium is an example
- 24. A nutrient that provides energy for the body; found in foods like pasta, bread, and rice
- 26. A combination of different substances that are not chemically bonded and can be separated easily
- 27. A circuit component that allows electricity to flow when turned on and stops the flow when turned off
- 28. A substance formed when two or more elements are chemically bonded together in fixed proportions
- 29. The flow of electrons through a circuit that allows electrical energy to be transferred to components
Down
- 1. The smallest building block of matter, making up all elements and compounds in the universe
- 2. A circuit component that reduces or controls the amount of current flowing through a circuit
- 3. A nutrient that helps with digestion by keeping the intestines healthy; found in wholemeal bread and cereals
- 6. A chemical reaction in which an acid and an alkali combine to form a neutral substance like salt and water
- 8. A system used in electronics to control circuits based on specific conditions using inputs and outputs
- 9. A dark, solid compound formed when iron reacts with sulfur in a chemical reaction, such as iron sulfide
- 10. A flammable gas that produces a squeaky pop sound when a lit splint is brought near it in a test tube
- 11. A liquid used to test for carbon dioxide gas; turns cloudy when carbon dioxide is bubbled through it
- 14. A table that organizes all known elements based on their atomic number, groups, and properties
- 15. A type of logic gate that allows an output if at least one of the input signals in a circuit is switched on
- 17. The process of breaking down food into smaller molecules so the body can absorb them for energy
- 18. A light-emitting diode that produces light when electricity passes through it but only works in one direction
- 19. A type of white blood cell that protects the body by engulfing and digesting harmful microbes
- 22. A measuring device used in an electric circuit to check the amount of current flowing in amperes
- 23. A nutrient that stores energy, insulates the body, and protects organs; found in oils and butter
- 25. A substance with a low pH value that tastes sour, turns blue litmus paper red, and can react with metals