Answer the following question given this paragraph: The arrow in Figure above shows that the reaction goes from left to right, from hydrogen and oxygen to water. The reaction can also go in the reverse direction. If an electric current passes through water, water molecules break down into molecules of hydrogen and oxygen. This reaction would be represented by a right-to-left arrow in Figure above . 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
Answer the following question given this paragraph: Did you ever make a "volcano," like the one in Figure below , using baking soda and vinegar? What happens when the two substances combine? They produce an eruption of foamy bubbles. This happens because of a chemical change. A chemical change occurs when matter changes chemically into an entirely different substance with different chemical properties. When vinegar and baking soda combine, they form carbon dioxide, a gas that causes the bubbles. It's the same gas that gives soft drinks their fizz. 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: Answer the following question given this paragraph: a deep hole in the seafloor where subduction takes place; trenches are the deepest places on Earth. Q: What is the term for the deepest places on earth? Choices: - the core - tunnels - mines - trenches A:
A: trenches
Question: Answer the following question given this paragraph: The genetic code is universal. All known living organisms use the same genetic code. This shows that all organisms share a common evolutionary history. Q: What common code do all known living organisms use? Choices: - biochemical - Morse code - code of ethics - genetic A:
Answer: genetic
*Question*
Answer the following question given this paragraph: The combined gas law shows the relationships among temperature, volume, and pressure. 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: Answer the following question given this paragraph: Echinoderms lack respiratory and excretory systems. Instead, the thin walls of their tube feet allow oxygen to diffuse in and wastes to diffuse out. Echinoderms also lack a centralized nervous system. They have an open circulatory system and lack a heart. On the other hand, echinoderms have a well-developed coelom and a complete digestive system. Echinoderms use pheromones to communicate with each other. They detect the chemicals with sensory cells on their body surface. Some echinoderms also have simple eyes ( ocelli ) that can sense light. Like annelids, echinoderms have the ability to regenerate a missing body part. 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