input: OPTIONS:
- earthquake
- avalanche
- tsunami
- landslide Now, answer this question: Q: What occurs when there is a sudden and large falling of rocks down a slope? A:
A:
output: landslide

Q: Where do greenhouse gases trap heat? A:

OPTIONS:
- ground
- space
- altitude
- atmosphere

Answer: atmosphere

Problem: OPTIONS:
- fatty junctions
- solid junctions
- special junctions
- tight junctions
Q: Q: What can prevent the passage of molecules and ions between cells, such as in the blood-brain barrier? A:
Answer: tight junctions

Problem:OPTIONS:
- a bio reaction
- spontaneous mutation
- cellular respiration
- a chemical reaction

Q: What is a process that changes some chemical substances into other chemical substances? A:
****
A: a chemical reaction

Q: What secures together immovable joints and prevents them from moving? A:
OPTIONS:
- light collagen
- light cartilage
- dense cartilage
- dense collagen
dense collagen

Q: Birds have a relatively large heart and a rapid what? A:
OPTIONS:
- lifespan
- blink rate
- digestive process
- heart rate

Answer:
heart rate