Question

1. predict: predict how changing the snake and hawk populations will affect the other organisms within the first year. in the tables below, write your predictions.

change	grass	rabbits	hawks
halving snake population	prediction: result	prediction: result	prediction: result

change	grass	rabbits	snakes
halving hawk population	prediction: result	prediction: result	prediction: result

Explanation:

Step1: Analyze doubling snake population

If the snake population doubles, more rabbits will be eaten. Fewer rabbits mean less grazing on grass, so grass may increase. With more snakes, hawks have more food, so hawk population may increase.

Step2: Analyze halving snake population

If the snake population halves, fewer rabbits will be eaten. More rabbits mean more grazing on grass, so grass may decrease. With fewer snakes, hawks have less food, so hawk population may decrease.

Step3: Analyze doubling hawk population

If the hawk population doubles, more snakes will be eaten. Fewer snakes mean more rabbits (less predation on rabbits), and more rabbits mean more grazing on grass (grass may decrease).

Step4: Analyze halving hawk population

If the hawk population halves, fewer snakes will be eaten. More snakes mean fewer rabbits (more predation on rabbits), and fewer rabbits mean less grazing on grass (grass may increase).

Answer:

Change	Grass	Rabbits	Hawks
Halving snake population	Prediction: Decrease; Result: Fewer snakes eat fewer rabbits, more rabbit - grazing on grass	Prediction: Increase; Result: Fewer snakes preying on rabbits	Prediction: Decrease; Result: Less food (snakes) for hawks
Doubling hawk population	Prediction: Decrease; Result: More hawks eat more snakes, fewer snakes eat fewer rabbits, more rabbit - grazing on grass	Prediction: Increase; Result: Fewer snakes preying on rabbits due to more hawk - predation on snakes	Prediction: -
Halving hawk population	Prediction: Increase; Result: Fewer hawks eat fewer snakes, more snakes eat more rabbits, less rabbit - grazing on grass	Prediction: Decrease; Result: More snakes preying on rabbits due to less hawk - predation on snakes	Prediction: -