The sign on a door reads: “Staff only. Visitors please use the main entrance on the left.” Where should visitors go?
- ATo the main entrance on the left
- BThrough this door
- CTo the staff room
- DTo the side exit on the right
The sign on a door reads: “Staff only. Visitors please use the main entrance on the left.” Where should visitors go?
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?
Many animals are active at night and sleep during the day. These animals are called nocturnal. Owls, bats and foxes are examples of nocturnal animals. What does “nocturnal” mean?
A footnote at the bottom of a page reads: “1. Data from the National Health Survey, 2022.” What is the purpose of the footnote?
Many people believe that cracking your knuckles causes arthritis. However, several studies have compared people who crack their knuckles with people who do not and found no difference in arthritis rates. 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?
A study compares two groups of patients after knee surgery. Group A did physiotherapy three times a week; Group B did it once a week. After two months, Group A could walk farther. The groups were similar in age and health at the start. Why does it matter that the groups were similar at the start?
“The kettle whistled, but Sarah did not move. She was staring at the letter in her hands, reading the same line again and again.” What can you infer?
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