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?
Our skin makes vitamin D when it is exposed to sunlight. Vitamin D helps the body take in calcium, which keeps bones strong. What does vitamin D help the body do?
“Every Sunday, the Garcia family visits the farmers’ market. They buy fresh bread, vegetables and eggs for the week ahead.” How often does the family visit the market?
“Water covers about 71 percent of Earth’s surface. Most of that water is salt water in the oceans. Only a small share is fresh water, and much of it is frozen in ice caps and glaciers.” What can you conclude from the passage?
In 1928 Alexander Fleming returned from holiday and noticed that mould had grown on one of his bacteria dishes. Around the mould, the bacteria had died. This led to the discovery of penicillin. What led Fleming to discover penicillin?
“When you exercise in hot weather, your body sweats to cool down. If you do not replace the lost fluid, you can become dehydrated, which may cause dizziness and headaches.” What is the main point of the passage?
A school sends this note: “Due to the forecast of heavy snow, all classes will move online on Friday. Students should log in at the usual time. The building will be closed.” Which statement is NOT supported by the note?
“The marathon was a test of will as much as of strength. By mile 20, Ana’s legs burned, but she pictured her mother waiting at the finish line and kept going.” What does the phrase “a test of will” mean here?
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