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An earth-sheltered house is built below grade or completely underground. These homes are less susceptible to the impact of extreme outdoor air temp...

The Landsat Program provides the longest continuous space-based record of Earth's land in existence. Since 1972, Landsat satellites have collected...

A good night's sleep consists of four to five sleep cycles. Each cycle includes periods of both deep sleep and rapid eye movement (REM) sleep. As t...

This passage implies that European medical practice in the early 1700s was(A)surprisingly safe(B)largely experimental(C)based on Indian and Chinese...

Based on the information in both passages, a reader could make the generalization that(A)Kafka was not entirely confident in his work.(B)As a write...

The passage implies that Voltaire(A)had ideas that got him into trouble(B)avoided controversy at all cost(C)was a well-respected thinker(D)preferre...

The details in the passage suggest that Rikki-tikki is(A)cold-hearted and expressionless(B)experienced in fighting cobras(C)overcome with fear and...

Which phrase best describes the conflict Rikki-tikki has with Nag and Nagaina?(A)engaging in a physical battle(B)making a difficult decision(C)stan...

What effect do the words "hiss," "whizzed," and "chattered" have on the passage?(A)They allow the reader to visualize the action.(B)They provide au...

Dogs have the ability to "read" human emotions. For example, dogs have been shown to discriminate between humans who approach in a friendly manner...

Samuel Hahnemann, a German physician and the founder of homeopathy, began as a village doctor and quickly became dissatisfied with how medicine was...

Jefferson Davis was an unusual man. During a long and frequently tragic life, his favorite job, according to his wife Varina, was serving as a U.S....