Fact 1: Cold fronts cause thunderstorms as they pass by. Fact 2: If cold air is advancing on warm air, the front is called a cold front. Given the two facts above, where do thunderstorms come from?

OPTIONS:
- Too much rain in the clouds
- When the environment is too cold
- Earth's axis of rotation is tilted
- fissures of hot, acidic water
- More than one trophic level.
- it flows to a lower level
- Dryness in the environment
- When cold air advances on warm air

Answer: When cold air advances on warm air

Problem: OPTIONS:
- microcosm
- genetic
- Plants growth
- macroevolution
- natural selection
- gastropod shells
- peachleaf willow
- Plant reproduction
Q: Fact 1: Macroevolution is evolution over geologic time above the level of the species. Fact 2: Besides the above-named species, various other species of the genus have been used medicinally. Given the two facts above, evolution over geologic time at the genus level and above is:?
Answer: macroevolution

Problem:OPTIONS:
- contamination
- water vapor
- coke
- Pollution
- chemical changes
- oxygen
- lowered energy cost
- bending light rays

Fact 1: Glass cause refraction of light. Fact 2: Refraction Refraction is the bending of light rays. Given the two facts above, what does glass cause?
****
A: bending light rays

Fact 1: Acid rain has a negative impact on water quality. Fact 2: Acid rain is caused by pollution. Given the two facts above, what is bad for water?
OPTIONS:
- pollution
- seaweed
- flooding
- rain
- deforestation
- Pesticides
- Wet weather
- fresh water
pollution

Fact 1: Wings are part of the exoskeleton and attached to the thorax. Fact 2: Butterflies bask to heat up their wing muscles for flight. Given the two facts above, what organism's instruments of flight are part of the exoskeleton and attached to the thorax?
OPTIONS:
- insects
- organs
- barnacles
- butterflies
- to move people
- honeybees
- it needs them
- Electric devices

Answer: butterflies

input with options: Fact 1: Mutations are essential for evolution to occur. Fact 2: Mutations Mutations are caused by random changes in genes. Given the two facts above, what is essential for evolution?
OPTIONS:
- hurricanes
- that material's properties
- remains of prehistoric life
- the body's largest organ
- revolutions
- Plant reproduction
- natural disasters
- random changes in genes
output:
random changes in genes