Which of the following models would best represent the inner and outer core of Earth, based on the physical characteristics of each layer? A metal ball bearing (solid) suspended in oil (liquid)
Gelatin (red semi-solid) on top of a cracker (brittle solid)
O
A ball of clay (solid) filled with water (liquid)
Rubber ball (flexible solid) painted red (thin solid covering)

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.