Investigating Science Module 4

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Across
  1. 3. A theory that explains how species change over time through natural selection and adaptation.
  2. 9. The scientific explanation that burning requires oxygen, replacing earlier incorrect ideas like phlogiston theory.
  3. 11. A scientific law stating that equal volumes of gases at the same temperature and pressure contain the same number of particles.
  4. 13. A law of inheritance stating that some traits are dominant and will appear in offspring even if only one parent passes on the gene.
  5. 16. A law in physics that states the current through a conductor is directly proportional to the voltage and inversely proportional to resistance (V = IR).
  6. 18. An old cosmological theory proposing that the universe has no beginning or end and is always expanding but maintaining constant density.
  7. 19. A disproven idea suggesting that traits gained during an organism’s life can be passed to its offspring.
Down
  1. 1. A theory explaining the movement of Earth’s crustal plates and how this movement shapes landforms and causes earthquakes and volcanoes.
  2. 2. A law stating that energy cannot be created or destroyed, only transformed from one form to another.
  3. 4. A law stating that the acceleration of an object depends on the force applied and its mass (F = ma).
  4. 5. The scientific explanation that all matter is made of atoms, which are the basic building blocks of elements.
  5. 6. A scientific law stating that matter cannot be created or destroyed in a closed system, only changed in form.
  6. 7. A scientific theory that matter is made up of indivisible atoms, later refined as new evidence showed atoms are divisible.
  7. 8. A geological law stating that in undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.
  8. 10. A theory that the universe began from a single point about 13.8 billion years ago and has been expanding ever since.
  9. 12. A statement that describes a consistent relationship or pattern in nature, usually expressed in words or mathematics.
  10. 14. An old and disproven theory that the Earth is at the centre of the universe and all planets and stars orbit it.
  11. 15. The theory that microorganisms are the cause of many diseases.
  12. 17. An explanation of natural events or phenomena that is supported by a large body of evidence and can be tested.