Q: Q: When fuel is burned, most of the energy is released in what form? Choices: - precipitation - carbon dioxide - humidity - heat A:
A: heat

Q: Q: What simple machine consists of two connected rings or cylinders, one inside the other, which both turn in the same direction around a single center point? Choices: - pully - bloom and axle - spoke - wheel and axle A:
A: wheel and axle

Q: Q: What is the diversity of living things called? Choices: - degradation - life cycle - ecosystem - biodiversity A:
A: biodiversity

Q: Q: What is the rising and sinking of warm and cooler material called? Choices: - depression - conveyance - diffusion - convection A:
A: convection