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- 1. Multiple Choice
The First "Newspaper" War
The Crimean War was fought in the 1850s between Russia on one side and Britain, France, and Turkey on the other. Although it was a major conflict, it is perhaps best remembered as the first war in which journalists were present on the battlefield. News dispatches from William Howard Russell, a reporter for the Times of London, exposed military blunders and revealed the filthy conditions that existed in military hospitals and camps. Photographers such as James Robertson and Roger Fenton made hundreds of photographs of soldiers on the battlefield. These news reports and photographs provided an uncensored look at life on the frontlines. The Crimean War marked the first time in history that people back home were exposed to the horrors of war.
The Crimean war was the first war to be documented for citizens.
The Crimean war was fought by the British, French, Turkish and Russians.
In WWII there was photography.
- 2. Multiple Choice
The Evolving Human Skeleton
Our early ancestors were hunter-gatherers who obtained food by hunting and by searching for edible wild plants. They needed strong bones, including large, strong jaws that enabled them to eat tough, uncooked foods. When our ancestors developed agriculture, however, their diet changed. They began growing plants, such as grains and beans, and raising animals for food; they also started cooking their foods, making them softer and easier to chew. Consequently, the human skeleton underwent radical changes. Over time, the human jaw became smaller and changed shape. Other bones also evolved, becoming lighter, especially in the joints, as result of both dietary changes and a less active lifestyle.
As early humans developed agriculture, their skeleton changed dramatically.
Early humans ate uncooked meat and vegetables so they needed strong jas.
Different mammals eat different types of food.
- 3. Multiple Choice
Making Towers Bird-Friendly
The lights on tall communication towers warn pilots to avoid the towers when flying at night. Unfortunately, the steady red lights often used on towers have the opposite effect on birds: the bright beams attract and confuse them. Instead of avoiding the lights, the birds fly directly toward them, crashing into the towers or becoming entangled in power lines. Millions of birds have died this way. However, there is a solution. Unlike steady lights, flashing or blinking lights don't attract birds. In response to demands from conservation groups, the Federal Aviation Administration in 2016 began requiring communication towers in the U.S. to use blinking lights instead of steady ones.
Communication towers warn pilots.
To save birds, communication towers have begun using blinking lights.
Birds are attracted to steady red lights on communication towers.
- 4. Multiple Choice
To Stand or Not to Stand?
In 2016, Vallecito Elementary School in San Rafael, California, became the first U.S. school to replace all of its ordinary desks with raised desks that students stand at. Speaking to a reporter from TIME for Kids magazine, one student at the school gave the standing desks high praise. "You feel happier, you're less tired, and you're more active," she said. According to several studies, children working at standing desks burn more calories and are more focused on tasks. However, some teachers and parents are opposed to the change. They are concerned that standing for long periods of time could cause fatigue, strain on the legs and feet, or posture problems. In addition, standing desks are more expensive than seated desks. Only time will tell whether standing desks will prove to be the next big trend or a failed experiment.
An elementary school implemented standing desks.
Standing can make you feel distracted.
Some people think standing desks promote good study habits but others are wary of them.
- 5. Multiple Choice
AC vs. DC
In the 1880s, the War of the Currents began. Thomas Edison developed direct current, or DC, a type of electricity that flows in one direction. By 1887, DC was in use around the United States. It had some drawbacks, though. Converting it to lower or higher voltages was difficult; that is, the current's force couldn't be changed easily. Transmitted at the low voltage needed for use in homes and businesses, it lost power after traveling only a mile. Meanwhile, Nikola Tesla was working with alternating current, or AC. AC reverses direction many times per second and can be changed to different voltages. At high voltage, it can be transmitted efficiently, traveling hundreds of miles with little energy loss. Because of its advantages, AC triumphed by the end of the nineteenth century.
DC has a distinct advantage over AC, so DC won the war of currents.
AC reverses direction and can be converted to higher and lower current.
- 6. Multiple Choice
Blooms in Death Valley
In March 2016, Death Valley National Park in California experienced a rare occurrence: thousands of yellow wildflowers covered the region in a "super bloom." Why was this unusual? Death Valley is the hottest and driest place in North America. The area's average yearly precipitation is just two inches, making it a challenging place for flowers to grow. However, in October 2015, the valley had received more than three inches of rain in some areas. As a result of the unusually wet season, wildflower seeds that had been lying dormant underground suddenly began to grow, producing an abundance of golden blooms.
Because of the hot, dry conditions in Death Valley, it is difficult for flowers to grow there.
Because of an unusual amount of rain, thousands of wildflowers grew in Death Valley in 2016.
Flowers need rainfall to grow.
The water cycle has changed over the years.
- 7. Multiple Choice
Naming Pluto
When "Planet X" was discovered in 1930, astronomers began debating what to call it. An eleven-year-old girl named Venetia Burney suggested the name "Pluto" to her grandfather, who passed the idea along to a friend who was a professor of astronomy. The professor, in turn, immediately forwarded the suggestion to scientists at the Lowell Observatory, where the planet had been discovered. The astronomers appreciated the fact that Pluto was the ancient Romans' name for the god of the underworld, making it a fitting moniker for such a cold and distant celestial body. In addition, its first two letters matched the initials of Percival Lowell, the astronomer who first proposed the existence of Planet X. The matter was eventually put to a vote, with Pluto the hands-down winner.
Pluto is no longer considered a planet in current day.
Astronomy is the study of the stars.
After an 11-year-old girl suggested the name "Pluto," astronomers chose it as the former planet's name.
Pluto is a good name for the cold, distant dwarf planet because Pluto is the name of a god of the underworld.
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