Q: What are reversible physical changes in matter called? A:
OPTIONS:
- chemical change
- alterations
- transformations
- changes of state
changes of state

Q: How many electrons can be accommodated in the first electron shell's orbital? A:
OPTIONS:
- none
- 1
- 3
- 2

Answer: 2

Question: Q: Neutron stars are the corpses of left over what? A:
OPTIONS:
- planet explosions
- gravitational explosions
- stellar explosions
- supernova explosions
Answer: supernova explosions

input with options: Q: When a fluorine atom gains an electron, it becomes a negative what? A:
OPTIONS:
- hydrogen ion
- sulfide ion
- potassium ion
- fluoride ion
output: fluoride ion

Q: Q: The action of sunlight on the skin triggers the body to produce what vitamin? A:

OPTIONS:
- Vitamin A
- metabolic d
- tissue d
- vitamin d

A: vitamin d

Q: What type of organism is commonly used in preparation of foods such as cheese and yogurt? A:
OPTIONS:
- protozoa
- gymnosperms
- viruses
- mesophilic organisms
mesophilic organisms