You are presented with the quiz "What do phones require to function?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "electric devices require electrical energy to function" and "ordinary phone is also a mobile device". So, what's the best answer to the question?

OPTIONS:
- encoded information
- graduated cylinderr
- math
- electrically
- electrical energy
- magnifying glass
- hydrogen and oxygen
- electromagnetic energy

Answer: electrical energy

You are presented with the quiz "Vertebrate chordates have what part of the skeletal system?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "vertebrate chordates have a backbone" and "invertebrates are animals who lack a backbone or spinal column". So, what's the best answer to the question?

OPTIONS:
- spinal column
- hard bones
- aerobic capacity
- cartilage bones
- critical organs
- joints
- fur and fat
- graptolites

Answer: spinal column

You are presented with the quiz "What are commonly found in soil and water?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "endospores are commonly found in soil and water" and "exospores and endospores are produced by some members of the cyanobacteria". So, what's the best answer to the question?

OPTIONS:
- chlorofluorocarbons
- space
- cyanobacteria
- humans
- bacteria
- Organic compounds
- planets
- hydrocarbons

Answer: cyanobacteria

You are presented with the quiz "What does an automobile create when it burns fuel?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "operating an automobile usually requires fossil fuels" and "automobiles and the burning of fossil fuels generate gases such as sulphur dioxide". So, what's the best answer to the question?

OPTIONS:
- Acids
- tar
- Energy.
- heat
- Gases
- gas
- sweat
- energy

Answer:
Gases