Problem:OPTIONS:
- fact
- change
- marker
- position

Q: The location of an object in a frame of reference is called what? A:
****
A: position

Q: What is a winding ridge of sand deposited by a stream of meltwater called? A:
OPTIONS:
- sand dune
- desert
- oasis
- esker
esker

Q: What has increased in the atmosphere throughout the history of the earth? A:
OPTIONS:
- nitrogen
- wind
- carbon
- oxygen

Answer: oxygen

Question: Q: What is required for a decay chain to end? A:
OPTIONS:
- stable half-life
- unstable end-product
- radioactive cascade
- stable end-product
Answer: stable end-product

input with options: Q: Light reactions occur during which stage of photosynthesis? A:
OPTIONS:
- intermediate stage
- third stage
- final stage
- first stage
output: first stage

Problem: OPTIONS:
- centripetal force
- gravitational force
- molecular force
- magnetic force
Q: Q: What force includes forces of attraction and repulsion? A:
Answer:
magnetic force