input: OPTIONS:
- dense part
- heavy part
- bright part
- shallow part Now, answer this question: Q: Which part of the wave helps make the wave bend and cause refraction? A:
A:
output: shallow part

Q: What is the greek word meaning "to help make things easier"? A:

OPTIONS:
- toy
- battery
- mode
- machine

Answer: machine

Problem: OPTIONS:
- electricity
- coal fuels
- batteries
- fossil fuels
Q: Q: Solar and wind are still expensive compared to what? A:
Answer: fossil fuels

Problem:OPTIONS:
- transmission
- vibration
- kinetic energy
- acceleration

Q: What is the measure of change in velocity of a moving object? A:
****
A: acceleration

Q: Solids can be divided into amorphous solids and which other group? A:
OPTIONS:
- morphous solids
- distinct solids
- acrystalline solids
- crystalline solids
crystalline solids

Q: How many people die from air pollution each year? A:
OPTIONS:
- 14 million
- 17 million
- 5 million
- 22 million

Answer:
22 million