Crows are clever birds. Scientists have seen them use sticks as tools to pull insects out of tree bark. What have scientists seen crows do?
- AUse sticks as tools
- BNest underground
- CCopy human words
- DSwim to catch fish
Crows are clever birds. Scientists have seen them use sticks as tools to pull insects out of tree bark. What have scientists seen crows do?
A fire drill teaches people how to leave a building quickly and safely. During a drill, everyone should walk, not run, to the nearest exit and wait at the meeting point outside. What should people do during a fire drill?
Volcanoes can be active, dormant or extinct. An active volcano has erupted recently or may erupt soon. A dormant volcano has not erupted for a long time but could erupt again. An extinct volcano is not expected to erupt again. What is a dormant volcano?
“Unlike email, which can be read at any time, a phone call needs both people to be available at once.” What difference does the sentence describe?
“The waiting room was packed. Every chair was taken, and a dozen people stood along the walls.” What does “packed” mean in this passage?
“The temperature dropped below freezing overnight. In the morning, the puddles on the path were hard and slippery.” Why were the puddles hard?
The author writes: “Some readers may find these figures alarming. Over the past decade, the number of nurses aged over 55 has doubled, while the number entering the profession has stayed flat.” What problem is the author most likely pointing to?
A product label reads: “Contains 200 mg of ibuprofen per tablet. Adults: 1–2 tablets every 4 to 6 hours. Do not exceed 6 tablets in 24 hours.” What is the most ibuprofen an adult may take in 24 hours according to the label?
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