Problem: OPTIONS:
- organisms and their habitat
- global warming
- Earth orbiting the Sun
- Solar energy
- scattered light
- Greenhouse gases
- Varying light output from sun
- Moon orbiting the Earth
Q: Fact 1: The Earth revolving around the Sun causes the seasons to change on its axis. Fact 2: Gold, scarlet, and auburn leaves make a mosaic of rich colors heralding seasonal change. Given the two facts above, what factor is instrumental behind the change of leaf colors during the year?
Answer: Earth orbiting the Sun

Problem:OPTIONS:
- humans
- leaves
- Oak
- dogs
- Trees
- cacti
- amoeba
- ferns

Fact 1: All plants have a characteristic life cycle that includes alternation of generations. Fact 2: All ferns are shade plants. Given the two facts above, what has a characteristic life cycle that includes alternation of generations?
****
A: ferns

Fact 1: Infection can cause bodily tissues to swell. Fact 2: Bacteria can cause infection. Given the two facts above, bacteria can cause what?
OPTIONS:
- common cold
- dead organisms
- influenza
- viral infections
- bodily tissues to swell
- contamination
- Something that causes allergies
- harmful substances
bodily tissues to swell

Fact 1: Treating water is used to remove harmful substances before drinking. Fact 2: Arsenic, a naturally occurring substance, contaminates water sources in many countries. Given the two facts above, what is treating water used to remove before drinking?
OPTIONS:
- arsenic
- air
- cellulose
- chemicals
- Collagen
- loose dirt
- water vapor
- ice

Answer: arsenic

Question: Fact 1: Temperature falls from lower to higher altitudes. Fact 2: Temperature values are in degrees celsius. Given the two facts above, what falls from lower to higher altitudes?
OPTIONS:
- gravity
- colder and wetter
- water vapor
- kinetic energy
- density
- degrees Celsius
- heat energy
- altitude
Answer: degrees Celsius

input: OPTIONS:
- garbage
- disease
- life
- mines
- flooding
- water
- cigarettes
- science Now, answer this question: Fact 1: Landfills have a negative impact on the environment. Fact 2: Garbage goes into Landfills. Given the two facts above, what has a negative impact on the environment?
A:
output:
garbage