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
- CSwim to catch fish
- DCopy human words
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?
The human eye has a coloured part called the iris. In the middle of the iris is a black opening called the pupil, which lets light into the eye. What does the pupil do?
Exercise makes the heart beat faster. This sends more blood and oxygen to the muscles that are working. Why does the heart beat faster during exercise?
“Pressure ulcers, also called bedsores, can form when a person lies in one position for too long. Nurses help prevent them by changing the patient’s position regularly.” Why do nurses change patients’ positions?
The author writes: “Every student should learn basic first aid. A few simple skills, such as how to help someone who is choking, can save a life.” What is the author’s purpose?
“Turn the oven off, then let the cake cool in the tin for ten minutes. After that, turn it out onto a wire rack to cool completely before icing.” What should be done just before the cake is iced?
The author writes: “Some readers will say a four-day work week would hurt productivity. Trials in several companies, however, found that output stayed the same while staff were less stressed.” How is the passage structured?
A medicine label reads: “Take 2 tablets every 6 hours as needed. Do not take more than 8 tablets in 24 hours.” A patient takes 2 tablets at 6 a.m., noon and 6 p.m. How many more tablets may the patient take before 6 a.m. the next day?
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