Fourth-graders richard and bruce sat on the stoop outside the school. they had missed their bus and now had to make the decision whether to walk taking a shortcut or just wait until their mothers noticed they had not arrived home

How is the introduction of the cane toad to queensland, australia an example of the unintended consequences of using non-native species to control pests? (site 1)

Which of the following forests would the wilderness act of 1964 most effectively protect from harmful logging? i. a forest containing several service roads ii. a forest through which a highway has been constructed iii. a forest that has never been affected by human development a. i only b. ii only c. iii only d. i and ii only e. i and iii only

How would you use a nuclear device to prevent an asteroid from hitting earth? a. use the device to blow up the asteroid b. use the device to blow up part of the asteroid and deflect it c. detonate the device in proximity to the asteroid to deflect it d. use the mass of the device to slingshot the asteroid out of orbit