2. Which event is most likely to change a forest habitat? A. The wind pollinates pine cones B. Berries ripen in the bushes C. Baby blue jays learn to fly D. There is no rain for three months
4. How might a drought change the environment? A. the ground may not hold all of the rain B. plants may grow too quickly for the animals to eat them C. lakes and rivers might dry up D. beaver dams might get washed away in the flood
6. What might happen if elephants eat all of the plants in an area? A. Other animals who eat those plants will leave in search of food B. The elephants will move on to another area C. After a while, grasses and small plants begin growing there D. All of the above
7. Answer A. Other animals who eat those plants will leave in search of food B. The elephants will move on to another area C. After a while, grasses and small plants begin growing there D. All of the above
8. Why might a seedling that sprouts after a forest fire be more likely to grow into a tree than one that sprouted before the fire? A. The fire kills many plants B. Before the fire, the tall trees blocked the sunlight the sprouts needed to grow C. Before the fire, there were no seeds on the ground D. After the fire there are no seeds
9. Answer B. Before the fire, the tall trees blocked the sunlight the sprouts needed to grow
10. What kind of organisms can become endangered? A. only plants B. only animals C. only predators D. any kind of organism
14. Which of these is NOT a fossil? A. a dinosaur bone that has been turned to stone B. the impression of an ancient giant fern in a rock C. the feather of a passenger pigeon D. an ancient cockroach, pressed in mud, turned into stone