Answer the following question given this paragraph: Exposed rocks in desert areas often develop a dark brown or black coating called desert varnish ( Figure below ). Wind transports clay-sized particles that chemically react with other substances at high temperatures. The coating is formed of iron and manganese oxides. Q: What is the term for the dark brown or black coating found on exposed desert rocks, which is formed of iron and manganese oxides? A:
OPTIONS:
- desert patina
- desert shadow
- desert rust
- desert varnish
desert varnish

Answer the following question given this paragraph: Q: What is captured by the sticky structure at the top of the style called the stigma? A:
OPTIONS:
- fungi
- sunlight
- precipitation
- pollen

Answer: pollen

Question: Answer the following question given this paragraph: Did you ever rub an inflated balloon against your hair? You can see what happens in Figure below . Friction between the rubber of the balloon and the baby's hair results in electrons from the hair "rubbing off" onto the balloon. That's because rubber attracts electrons more strongly than hair does. After the transfer of electrons, the balloon becomes negatively charged and the hair becomes positively charged. As a result, the individual hairs repel each other and the balloon and the hair attract each other. Electrons are transferred in this way whenever there is friction between materials that differ in their ability to give up or accept electrons. Q: When a balloon is rubbed against hair, they attract each other because of a difference in what? A:
OPTIONS:
- Force
- Friction
- actions
- charges
Answer: charges

input with options: Answer the following question given this paragraph: Accuracy describes how close an estimate is to a known standard. Q: What describes how close an estimate is to a known standard? A:
OPTIONS:
- diversity
- frequency
- precision
- accuracy
output: accuracy

Q: Answer the following question given this paragraph: The continent of Antarctica is covered with an ice cap. Q: Which continent is covered with an ice cap? A:

OPTIONS:
- asia
- greenland
- australia
- antarctica

A: antarctica

Answer the following question given this paragraph: Most scientists who study dark matter think it is a combination. Ordinary matter is part of it. That is mixed with some kind of matter that we haven't discovered yet. Most scientists think that ordinary matter is less than half of the total matter in the universe. Q: Most scientists think that ordinary matter is less than half of the total matter in the universe; the remaining part includes what mysterious entity? A:
OPTIONS:
- mystery matter
- magic matter
- cold matter
- dark matter
dark matter