Q: Q: What is happening to the rate of the expansion of the universe? A:

OPTIONS:
- it is decreasing
- it is stable
- it is unknown
- it is increasing

A: it is increasing

input: OPTIONS:
- hydrogen
- pressure
- nitrogen
- energy Now, answer this question: Q: All chemical changes involve a transfer of what? A:
A:
output: energy

Q: The cell theory and the theory of evolution by natural selection are basic to all fields in what branch of science? A:

OPTIONS:
- rock science
- zoology
- chemistry
- life science

Answer: life science

Problem: OPTIONS:
- surface
- outer core
- inner core
- crust
Q: Q: Besides the uppermost mantle, what else is the lithosphere composed of? A:
Answer: crust

Problem:OPTIONS:
- niacin
- vitamin A
- vitamin C
- vitamin d

Q: A diet rich in calcium and what vitamin may reduce the risk of osteoporosis and related bone fractures? A:
****
A: vitamin d

Problem:OPTIONS:
- strong magnetism
- hydromagnetism
- exomagnetism
- electromagnetism

Q: What is magnetism produced by an electrical current? A:
****
A:
electromagnetism