Some plants, like the cactus, store water in their thick stems. This helps them survive in deserts, where rain may not fall for months. How do cactus plants survive in the desert?
The Dead Sea, between Israel and Jordan, is so salty that people can float on its surface without trying. Very few living things can survive in its water. Why can people float easily in the Dead Sea?
Dolphins are mammals, not fish. They breathe air through a blowhole on top of their heads and must come to the surface to breathe. Mother dolphins feed their young with milk. Which detail shows that dolphins are mammals?
“When you have a cold, the lining of your nose swells and makes more mucus. This is why your nose feels blocked.” What causes the blocked feeling in your nose?
“The whale is the largest animal on Earth. Some blue whales are longer than two buses parked end to end.” Why does the author compare whales to buses?
“Mobile clinics now travel to farming villages twice a month. Before, people had to travel three hours to the nearest doctor.” What is the main benefit of the mobile clinics?
Paragraph 1 describes how tooth decay is caused by bacteria feeding on sugar. Paragraph 2 describes how fluoride makes teeth more resistant to acid. Paragraph 3 recommends brushing with fluoride toothpaste and limiting sugary snacks. How is the passage organised?
Read the sentences: (1) Then add the pasta and stir. (2) Fill a large pot with water. (3) Drain the pasta when it is soft. (4) Bring the water to the boil. Which order is correct?
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