Q: Q: The water cycle involves movement of water between air and what? Choices: - tree - animals - air - land A:
A: land

Q: Q: What do chemotrophs extract energy from? Choices: - liquid compounds - carbon compounds - fatty compounds - chemical compounds A:
A: chemical compounds

Q: Q: What process is at work when warm air or water rises, and cool air or water sinks? Choices: - evaporation - radiation - moisture - convection A:
A: convection

Q: Q: Which system transports oxygens to cells? Choices: - vascular system - nervous system - oxy system - circulatory system A:
A: circulatory system