*Question*
If animals use fat to store energy, then what do animals use to store food? Answer choices: - pan - fat - Urea - calories - sugar - jaws - nest - carbohydrates
**Answer**
fat

*Question*
If using a gasoline engine requires easy ignition, then using a gasoline engine requires what? Answer choices: - electricity - no ignition - carbon dioxide - easy ignition - difficult ignition - no gasoline - hydrogen and oxygen - adding heat
**Answer**
easy ignition

*Question*
If leaves are used to store water, then what are leaves used to store? Answer choices: - wind - fats - water - sunlight - lipids - glucose - soil - energy
**Answer**
water

*Question*
If living things all require energy for reproduction, then what do all living things require in order to reproduce? Answer choices: - Proteins - food - DNA - nutrients - energy - Light - bamboo - sunlight
**Answer**
energy