Q: Fact 1: Increasing heat causes thermal expansion. Fact 2: Fire heats upwards. Given the two facts above, what underneath an object will cause thermal expansion? | OPTIONS:
- ice
- Gases
- LEDs
- iron
- fire
- energy
- fan
- nothing
A: fire

Q: Fact 1: Acar engine usually converts gasoline into motion and heat through combustion. Fact 2: Gasoline is made up of hydrocarbons. Given the two facts above, a car engine uses what to aid in combustion? | OPTIONS:
- carbon dioxide
- electricity
- organic molecules
- thrust
- hydrocarbons
- a hydraulic system
- kinetic energy
- fossil fuels
A: hydrocarbons

Q: Fact 1: Most reptiles have good eyesight and a keen sense of smell. Fact 2: Olfaction is the sense of smell and gustation is the sense of taste. Given the two facts above, what is one attribute of most reptiles? | OPTIONS:
- aerobic capacity
- good olfaction
- a cuticle
- warm-blooded
- graptolites
- an organism's body
- permineralization
- stamina
A: good olfaction

Q: Fact 1: Freshwater biomes have water that contains little or no salt. Fact 2: Salinity is the measure of salts in the water. Given the two facts above, which kind of biomes usually have low salinity? | OPTIONS:
- homogenous
- Loose
- loose soil
- deserts
- jungles
- oceans
- Sediment
- freshwater
A: freshwater