Q: If fire underneath an object will cause thermal expansion, then what underneath an object will cause thermal expansion? Answer choices: - ice - Gases - LEDs - iron - fire - energy - fan - nothing
A: fire

Q: If acar engine converts a fuel of hydrocarbons into motion through combustion, then acar engine uses what to aid in combustion? Answer choices: - carbon dioxide - electricity - organic molecules - thrust - hydrocarbons - a hydraulic system - kinetic energy - fossil fuels
A: hydrocarbons

Q: If most reptiles have good olfaction, then what is one attribute of most reptiles? Answer choices: - aerobic capacity - good olfaction - a cuticle - warm-blooded - graptolites - an organism's body - permineralization - stamina
A: good olfaction

Q: If freshwater biomes have very low salinity, then which kind of biomes usually have low salinity? Answer choices: - homogenous - Loose - loose soil - deserts - jungles - oceans - Sediment - freshwater
A: freshwater