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?
Plants make their own food through photosynthesis. They use sunlight, water and carbon dioxide from the air to make sugar, and they give off oxygen. What gas do plants give off during photosynthesis?
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?
“Old Mr. Hale’s garden was full of weeds, the gate hung from one hinge, and the windows were covered in dust.” What can the reader most likely infer?
A notice says: “The water will be turned off in Building C from 9 a.m. to noon on Thursday for pipe repairs. Please store some water in advance.” What does the notice suggest residents should do?
“The patient’s blood pressure was stable throughout the night, with every reading close to the one before.” What does “stable” mean here?
“Jon shoved his hands in his pockets and kicked a stone along the path. ‘Fine,’ he muttered, ‘I didn’t want to play anyway.’” What do Jon’s words and actions suggest?
“Researchers gave half of a group of volunteers a new vitamin and the other half a dummy pill. Neither the volunteers nor the researchers knew who got which until the end.” Why did the researchers keep this secret?
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