Question: Answer the following question given this paragraph: A proton is a particle in the nucleus of an atom that has a positive electric charge. All protons are identical. It is the number of protons that gives atoms of different elements their unique properties. Atoms of each type of element have a characteristic number of protons. For example, each atom of carbon has six protons, as you can see in Figure below . No two elements have atoms with the same number of protons. Q: Which particle of an atom has a positive electric charge? A:
OPTIONS:
- electron
- nutron
- nucleus
- proton
Answer: proton

Question: Answer the following question given this paragraph: Two planets are on a collision course, heading directly towards each other at 0.250c . A spaceship sent from one planet approaches the second at 0.750c as seen by the second planet. What is the velocity of the ship relative to the first planet? 28. When a missile is shot from one spaceship towards another, it leaves the first at 0.950c and approaches the other at ships?. Q: Spinal cord injuries are notoriously difficult to treat because spinal nerves do not do what? A:
OPTIONS:
- cover
- cartilage
- moisture
- regenerate
Answer: regenerate

Question: Answer the following question given this paragraph: A mudflow is the sudden flow of mud down a slope because of gravity. Mudflows occur where the soil is mostly clay. Like landslides, mudflows usually occur when the soil is wet. Wet clay forms very slippery mud that slides easily. Mudflows follow river channels, washing out bridges, trees, and homes that are in their path. Q: What's it called when there's a sudden flow of mud? A:
OPTIONS:
- avalanche
- sediment
- dirt bath
- mudflow
Answer:
mudflow