Camels can go for many days without drinking. When they do find water, they can drink a very large amount in a short time. Their hump stores fat, not water. What does a camel’s hump store?
- AAir
- BWater
- CMilk
- DFat
Camels can go for many days without drinking. When they do find water, they can drink a very large amount in a short time. Their hump stores fat, not water. What does a camel’s hump store?
The Great Wall of China is not a single wall. It is a series of walls built over many centuries by different rulers to protect against invasions. Why was the Great Wall built?
Many birds fly south in the autumn. They travel to warmer places where food is easier to find. In the spring, they return north to build nests and raise their young. Why do many birds fly south in the autumn?
“The library will close early on Friday for staff training. Books due on Friday may be returned on Saturday without a late fee.” What can a library user conclude?
Washing hands with soap for at least 20 seconds removes many germs. Soap breaks up the oily layer that holds germs on the skin, and rinsing washes them away. What is the author’s main purpose?
“The lungs contain millions of tiny air sacs called alveoli. Here, oxygen passes into the blood, and carbon dioxide passes out to be breathed away.” What happens in the alveoli?
“Patients must not eat or drink after midnight before surgery. Small sips of water to take morning medicines are allowed only if the surgeon has agreed.” A patient’s surgeon has agreed. What may the patient do at 7 a.m.?
A graph shows that ice-cream sales and sunburn cases both rise in summer. A writer concludes that eating ice cream causes sunburn. What is the best explanation for the link?
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