1.
The watt is named after James Watt, the British engineer who developed the
steam engine in 1760s.
Correct Answer
B. The British
Explanation
The correct answer is "the British" because the question is asking for the nationality of James Watt, the engineer who developed the steam engine in the 1760s. James Watt was British, so the answer is "the British".
2.
Methane is a odorless burning gas and is the main ingredient of natural gas.
Correct Answer
B. A odorless
Explanation
Methane is described as "a odorless" in the given statement. This means that methane does not have a distinct smell. This is a characteristic of methane and is important to know because it helps in identifying the gas. Additionally, the statement mentions that methane is the main ingredient of natural gas. This implies that natural gas primarily consists of methane.
3.
The alcohol acts as as a narcotic on the nervous system and the brain .
Correct Answer
B. A narcotic
Explanation
Alcohol is classified as a narcotic because it depresses the central nervous system, slowing down brain activity and causing sedation. It affects the neurotransmitters in the brain, leading to changes in mood, behavior, and cognitive function. Alcohol's narcotic properties can result in relaxation, pain relief, and a decrease in anxiety. However, excessive alcohol consumption can lead to impairment of motor skills, memory loss, and addiction.
4.
Zachary Taylor was first president to be elected from a state west of Mississippi River.
Correct Answer
D. Mississippi River
Explanation
Zachary Taylor was the first president to be elected from a state west of the Mississippi River. This means that all previous presidents were elected from states located east of the Mississippi River. The Mississippi River is a major geographical landmark in the United States, dividing the country into eastern and western regions. Taylor's election from a state west of the Mississippi River marked a significant shift in the political landscape and representation of the country's leadership.
5.
Barnacles, which are related to lobsters, shrimp, and crabs, make strongest glue.
Correct Answer
D. Strongest glue
Explanation
Barnacles, which are related to lobsters, shrimp, and crabs, produce the strongest glue. This is because barnacles need to attach themselves firmly to various surfaces in order to survive in their marine environment. Their glue is incredibly strong and durable, allowing them to withstand the force of ocean waves and currents. The strength of their glue is essential for their survival and ability to remain attached to surfaces for extended periods of time.
6.
In the 1860s Louis Pasteur discovered that bacteria in air caused the pperishable food to go bad.
Correct Answer
A. In the 1860s
Explanation
In the 1860s, Louis Pasteur made a significant discovery regarding the spoilage of perishable food. He found that the presence of bacteria in the air was responsible for the food going bad. This discovery revolutionized the understanding of food preservation and led to the development of pasteurization, a process that kills harmful bacteria in food to extend its shelf life.
7.
Land covers almost third of the ear t h’s sur face, of which two-thirds is too cold or too dry for farming.
Correct Answer
D. Two-thirds
Explanation
Two-thirds of the earth's surface is too cold or too dry for farming. This means that only one-third of the land is suitable for agriculture.
8.
“Old Faithful” in Yellowstone National Park is probably t he wo r ld’ s most famous geyser.
Correct Answer
A. "OldFaithful"
Explanation
"Old Faithful" in Yellowstone National Park is considered the world's most famous geyser because of its regular and predictable eruptions. It earned its name "Old Faithful" due to its consistent behavior of erupting approximately every 90 minutes, shooting hot water and steam into the air. This geyser has become an iconic symbol of Yellowstone and attracts millions of visitors each year who come to witness its impressive displays of natural beauty and power.
9.
Thermographs are special pictures that show the variation in heat emitted by different areas of body.
Correct Answer
D. Of body
Explanation
Thermographs are special pictures that show the variation in heat emitted by different areas of the body. This means that a thermograph can capture and display the differences in temperature across different parts of the body. By using thermal imaging technology, thermographs can provide valuable information about heat distribution, which can be useful in various fields such as medicine, sports science, and building inspections.
10.
The wo r ld ’s fastest animal is cheetah, but if birds are included, the fastest of all animal is the spine-tailed swift.
Correct Answer
D. The spine-tailed
Explanation
The explanation for the given correct answer is that while the cheetah is the fastest land animal, when birds are included, the spine-tailed swift is the fastest of all animals. This implies that the spine-tailed swift can fly at a higher speed than the cheetah can run.
11.
The most of the energy used in our homes and factories is generated from coal, oil, and natural gas.
Correct Answer
A. The most
Explanation
The given answer states that the majority of the energy used in our homes and factories is generated from coal, oil, and natural gas. This implies that these fossil fuels are the primary sources of energy production, indicating their widespread use and importance in meeting our energy needs.
12.
Soybeans were first grown in the Orient and brought to the Western world during the World War II
Correct Answer
B. The Orient
Explanation
During World War II, soybeans were first cultivated in the Orient and then introduced to the Western world.