input: OPTIONS:
- structure and function
- Time and energy
- Grams per gallon
- Length
- Bundles of fibers
- Inches or fractions of inches.
- Pounds
- deoxyribonucleic acid Now, answer this question: Fact 1: Aruler is used for measuring the length of an object. Fact 2: Rulers are divided into inches and fractions of inches. Given the two facts above, what's one common unit for measuring the length of an object?
A:
output: Inches or fractions of inches.

Fact 1: Clouds are formed by water vapor rising into colder regions of the atmosphere and condensing. Fact 2: The change of vapor into water, as in the formation of rain. Given the two facts above, where does rain come from?

OPTIONS:
- Moisture in the ocean
- Chopping down trees
- near the shoreline
- movements in the earth's crust
- Moisture in the clouds
- air mass over Earth's surface
- Boiling water on the stove
- Leeuwenhoek

Answer: Moisture in the clouds

Problem: OPTIONS:
- contamination
- flooding
- plants to die
- Pollution
- chemical reaction
- Greenhouse gasses
- global warming
- harmful substances
Q: Fact 1: Changes in the pH of soil can cause plants to die. Fact 2: Sulfur lowers pH in soil. Given the two facts above, adding sulfur to soil can cause what?
Answer: plants to die

Problem:OPTIONS:
- H 2 O
- humans
- food
- shelter
- a path
- abcess
- mates
- water

Fact 1: Male dogs use pheromones in urine to mark their territory. Fact 2: All animals emit pheromones to mate. Given the two facts above, male dogs use urine to mark their territory the same way as they find what?
****
A: mates

Fact 1: Animals may compete for territory, water, food, or mates. Fact 2: All lions are animals. Given the two facts above, what may compete for territory, water, food, or mates?
OPTIONS:
- land
- Birds
- lions
- bacteria
- koalas
- plants
- humans
- bears
lions

Fact 1: Some insects can use their antennae to detect sound. Fact 2: Insects have chemical receptors on their antennae, legs or feet. Given the two facts above, what can insects detect with their feet?
OPTIONS:
- movement
- spectrum
- parasites
- Soil movement
- Light
- chemicals
- temperature
- heat produced

Answer:
chemicals