The heart has four chambers. The two upper chambers are called atria, and the two lower chambers are called ventricles. What are the two lower chambers called?
- AVentricles
- BValves
- CCoronary arteries
- DAtria
The heart has four chambers. The two upper chambers are called atria, and the two lower chambers are called ventricles. What are the two lower chambers called?
Owls hunt mostly at night. Their large eyes help them see in dim light, and their excellent hearing lets them find mice hidden under leaves or snow. Which two features help owls hunt at night?
A pharmacy sign reads: “Open Monday to Friday 9 a.m.–7 p.m., Saturday 9 a.m.–5 p.m. Closed Sunday.” On which day does the pharmacy close earliest?
“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?
Some people think that a cold is caused by being out in cold weather. Colds are actually caused by viruses. People may catch more colds in winter because they spend more time indoors, close to others. According to the passage, why might colds be more common in winter?
A line graph shows the number of visitors to a park each month. The line rises steadily from January to July, then falls from August to December. Which statement best describes the data?
“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?
“In one study, people who were told a pill would ease their pain reported less pain, even though the pill contained no medicine.” What does this study illustrate?
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