Q: What are color and hardness physical properties of? Choices: - cells - ions - elements - matter A:
matter

Q: How is the energy of an atomic orbital affected as the principal quantum number increases? Choices: - it decreases - It doubles - It triples - it increases A:
it increases

Q: Q: What is the outer core made of? Choices: - compressed air - solid rock - solid iron - liquid metal A:
A: liquid metal

Question: Q: What is the only human cell with flagella? Choices: - egg - saliva - Feces - sperm A:
Answer: sperm

*Question*
Q: Different types of home heating systems all function by producing what type of energy? Choices: - electron - natural - distinct - thermal A:
**Answer**
thermal

Q: Q: Sensory neurons transmit nerve impulses from sense organs and internal organs to the brain via the? Choices: - nervous system - nerve endings - spinal column - spinal cord A:
A: spinal cord