Fact 1: Eating food that contains pesticides can have a negative impact on humans. Fact 2: Pesticides are chemicals that kill pests. Given the two facts above, eating food that contains what can have a negative impact on humans?
OPTIONS:
- vitamins
- antioxidants
- Abnormal cell growth
- pest-killing chemicals
- Something that causes allergies
- harmful substances
- minerals
- a pathogens

Answer: pest-killing chemicals

Fact 1: Adoorbell converts electrical energy into sound. Fact 2: Speakers convert electrical energy into sound waves. Given the two facts above, what energy does a door doorbell need to be heard through speakers?
OPTIONS:
- consumers
- Solar
- Motion
- to move people
- sensory neurons
- Wind
- it needs them
- Electrical

Answer: Electrical

Fact 1: Atelephone is used for communication by humans over long distances. Fact 2: Telephone lines conduct electricity. Given the two facts above, what is used for communication by humans over long distances?
OPTIONS:
- A Greek letter
- electricity
- airplanes
- kinetic energy
- trains
- sign language
- photons
- messengers

Answer:
electricity