Q: Fact: sugar causes food to taste sweet
Question: What causes food to taste sweet?
OPTIONS:
- crystal sucrose
- heat
- salt
- pepper

A: crystal sucrose

Q: Fact: an ecosystem contains nonliving things
Question: What is part of an ecological system?
OPTIONS:
- waterfalls
- pulsars
- black holes
- asteroids

A: waterfalls

Q: Fact: temperature changing can cause phase changes
Question: melting ice may be formed by
OPTIONS:
- the moon
- temp change
- an iceberg
- a reaction

A: temp change

Q: Fact: humans discarding waste in an environment causes harm to that environment
Question: Which has a positive impact on the environment in the world?
OPTIONS:
- building large numbers of cars
- contaminating the ground with poisonous substances
- dumping toxic waste in ocean
- making sure trash is reused for new purposes

A:
making sure trash is reused for new purposes