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

Answer the following question given this paragraph: The location of an object in a frame of reference is called position. Q: The location of an object in a frame of reference is called what? A:
****
A: position

Answer the following question given this paragraph: An esker is a winding ridge of sand deposited by a stream of meltwater. Such streams flow underneath a retreating glacier. Q: What is a winding ridge of sand deposited by a stream of meltwater called? A:
OPTIONS:
- sand dune
- desert
- oasis
- esker
esker

Answer the following question given this paragraph: Oxygen has increased in the atmosphere throughout the history of the earth. Note the logarithmic scale, which indicates great increases after first photosynthesis (in bacteria) and then land plants evolved. Related geological events: A = no oxidized iron; B = oxidized iron bands in seabed rock - evidence for O 2 in the oceans; C = oxidized iron bands on land and ozone layer formation- evidence for O 2 in the atmosphere. Q: What has increased in the atmosphere throughout the history of the earth? A:
OPTIONS:
- nitrogen
- wind
- carbon
- oxygen

Answer: oxygen

Question: Answer the following question given this paragraph: We have talked about the activity and decay of individual isotopes. In the real world, there is a decay chain that takes place until a stable end-product is produced. For U-238, the chain is a long one, with a mix of isotopes having very different half-lives. The end of the chain resides in lead, a stable element that does not decay further. 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: Answer the following question given this paragraph: The light reactions occur in the first stage of photosynthesis. This stage takes place in the thylakoid membranes of the chloroplast. In the light reactions, energy from sunlight is absorbed by chlorophyll. This energy is temporarily transferred to two molecules: ATP and NADPH. These molecules are used to store the energy for the second stage of photosynthesis. The light reactions use water and produce oxygen. 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: Answer the following question given this paragraph: The force that a magnet exerts is called magnetic force. The force is exerted over a distance and includes forces of attraction and repulsion. A magnet can exert force over a distance because the magnet is surrounded by a magnetic field. Q: What force includes forces of attraction and repulsion? A:
Answer:
magnetic force