You are presented with the quiz "What comes from burning coal and oil dissolving in water in the atmosphere?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "gases from burning coal and oil dissolving in water in the atmosphere causes acid rain" and "an acid is defined as a compound which can donate a proton ". So, what's the best answer to the question?

OPTIONS:
- Plant growth is reduced
- A transportation fuel
- Generating heat
- harmful substances
- DNA damage and mutations
- A compound that donates proton
- ozone depletion
- Mutagenic chemicals

Answer: A compound that donates proton

You are presented with the quiz "What would wind going through a whistle cause?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "blowing air into a whistle causes air to vibrate inside the whistle" and "soon the wind blows in fresh air". So, what's the best answer to the question?

OPTIONS:
- vortex
- friction
- vibrant colors
- waves
- Energy.
- kinetic energy
- absence of sound
- vibrations

Answer: vibrations

You are presented with the quiz "Earth orbiting the Sun causes changes to what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "earth orbiting the Sun causes seasons to change" and "weather changes from season to season". So, what's the best answer to the question?

OPTIONS:
- weather
- sunlight
- colors
- food
- herds
- water
- earth
- climate

Answer: weather

You are presented with the quiz "what do arteries carry?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "arteries generally carry oxygen-rich blood" and "oxygen-rich blood is bright red". So, what's the best answer to the question?

OPTIONS:
- brain waves
- bright red blood
- wavelengths and photons
- nerve cells
- energy of moving objects
- Veins and arteries.
- veins
- heat energy

Answer:
bright red blood