Problem: OPTIONS:
- convection
- chemical reactions
- evaporation
- radiation
Q: Answer the following question given this paragraph: Long-term or high-dose exposure to radiation can harm both living and nonliving things. Radiation knocks electrons out of atoms and changes them to ions. It also breaks bonds in DNA and other compounds in living things. One source of radiation that is especially dangerous to people is radon. Radon is a radioactive gas that forms in rocks underground. It can seep into basements and get trapped inside buildings. Then it may build up and become harmful to people who breathe it. Long-term exposure to radon can cause lung cancer. Q: This knocks electrons from atoms and turns them into ions? A:
Answer: radiation

Problem:OPTIONS:
- mechanism review
- embrace review
- process review
- peer review

Answer the following question given this paragraph: Scientists may publish articles about their research in peer-reviewed science journals. Peer review means that the work is analyzed by peers, in other words, by other scientists. The articles are published only if the other scientists are convinced that the research is accurate and honest. Q: What is the process where scientific articles are checked and analyzed by other scientists before publication? A:
****
A: peer review

Answer the following question given this paragraph: Most sedimentary rocks form from sediments. The sediments must be packed together to form a rock. Sedimentary rocks also form as minerals precipitate from saline water. Sedimentary rock formation is described in the next concept. Q: Most sedimentary rocks form from what? A:
OPTIONS:
- volcanic activity
- glaciers
- erosion
- sediments
sediments

Answer the following question given this paragraph: Q: Pigments are substances that absorb what? A:
OPTIONS:
- synthetic light
- artificial light
- natural light
- visible light

Answer: visible light

Question: Answer the following question given this paragraph: Two main zones based on depth of water are the photic zone and aphotic zone. The photic zone is the top 200 meters of water. The aphotic zone is water deeper than 200 meters. The deeper you go, the darker the water gets. That's because sunlight cannot penetrate very far under water. Sunlight is needed for photosynthesis. So the depth of water determines whether photosynthesis is possible. There is enough sunlight for photosynthesis only in the photic zone. Q: The lighter photic zone and darker aphotic zone are determined by what? A:
OPTIONS:
- water reflection
- water shape
- water density
- water depth
Answer: water depth

input: OPTIONS:
- square boxes
- big flashlights
- flat paper
- thin glass tubes Now, answer this question: Answer the following question given this paragraph: Besides entertaining a cat, laser light has many other uses. It is used to scan bar codes, for example, and to carry communication signals in optical fibers. Optical fibers are extremely thin glass tubes that are used to guide laser light (see Figure below ). Sounds or pictures are encoded in pulses of laser light, which are then sent through an optical fiber. All of the light reflects off the inside of the fiber, so none of it escapes. As a result, the signal remains strong even over long distances. More than one signal can travel through an optic fiber at the same time, as you can see in Figure below . Optical fibers are used to carry telephone, cable TV, and Internet signals. Q: What do optical fibres look like? A:
A:
output:
thin glass tubes