Fact 1: Water vapor cooling causes that water vapor to condense. Fact 2: All lenses are anti-fog coated to eliminate condensation. Given the two facts above, what could cause lenses to fog?
OPTIONS:
- energy of moving objects
- Transpiration from plants
- Water evaporating
- heating liquids
- Water vapor cooling
- Ice sublimating
- scattered light
- The atmosphere

Answer: Water vapor cooling

Fact 1: Abalance is used for measuring mass of an object. Fact 2: Mass Amount of matter an object contains. Given the two facts above, what can be used to measure the amount of matter an object contains?
OPTIONS:
- Joules
- density
- Protractor
- Thermometer
- energy
- Balance
- Accelerometer
- microscope

Answer: Balance

Fact 1: Competition may cause animals to fight towards members of their own species. Fact 2: Competition between male animals is common in nature. Given the two facts above, what is common in males of the same species?
OPTIONS:
- competition
- dancing
- mating
- traits
- females
- biceps
- Allergies
- hormones

Answer:
competition