Problem:OPTIONS:
- byproduct
- emission
- coolant
- refrigerant

Q: What do you call the substance in a cooling system that has a low boiling point and changes between liquid and gaseous states? A:
****
A: refrigerant

Q: Poetically speaking, nature reserves are islands of what, in a sea of habitat degraded by human activity? A:
OPTIONS:
- refuge
- habitats
- ecosystem
- biodiversity
biodiversity

Q: What helps the cell continually renew itself? A:
OPTIONS:
- vacuole
- centrosome
- lymphocytes
- lysosomes

Answer: lysosomes

Question: Q: In science, what process produces evidence that helps answer questions and solve problems? A:
OPTIONS:
- information
- manipulation
- suspension
- investigation
Answer: investigation

input with options: Q: What is the term for the change in temperature with distance? A:
OPTIONS:
- heat gradient
- distance gradient
- temperature volatility
- temperature gradient
output: temperature gradient

Problem: OPTIONS:
- depression
- conveyance
- diffusion
- convection
Q: Q: What is the rising and sinking of warm and cooler material called? A:
Answer:
convection