Q: If an electric current passes through water, water molecules break down into molecules of what? Choices: - carbon and oxygen - hydrogen and carbon - oxygen and methane - hydrogen and oxygen A:
hydrogen and oxygen

Q: What type of change occurs when matter changes chemically into an entirely different substance with different chemical properties? Choices: - physical - material - genetic - chemical A:
chemical

Q: Q: What is the term for the deepest places on earth? Choices: - the core - tunnels - mines - trenches A:
A: trenches

Question: Q: What common code do all known living organisms use? Choices: - biochemical - Morse code - code of ethics - genetic A:
Answer: genetic

*Question*
Q: What law shows the relationships among temperature, volume, and pressure? Choices: - Newton's law - Murphy's Law - Law of Conservation - combined gas A:
**Answer**
combined gas

Q: Q: Echinoderms lack what type of system that in humans consists of the brain and spinal cord? Choices: - autonomic system - endocrine system - peripheral nervous system - centralized nervous system A:
A: centralized nervous system