Correct Answer : Nitrogen
The most common nutrients causing eutrophication are nitrogen N and phosphorus P.
Correct Answer : Insects
In terms of numbers of species, insects certainly represent the largest percentage of the world's organisms. There are more than 1 million species of insects that have been documented and studied by scientists.
Correct Answer : Sodium bicarbonate
Sodium bicarbonate (NaHCO₃), also called baking soda, is a crystalline salt, found in a natural mineral form in nahcolite deposits.
Correct Answer : Byssinosis
Correct Answer : Bacteria
Correct Answer : Teeth
Correct Answer : Infrared
The main technology used in home remote controls is infrared (IR) light. The signal between a remote control handset and the device it controls consists of pulses of infrared light, which is invisible to the human eye but can be seen through a digital camera, video camera or a phone camera.
Correct Answer : Universe
The best-supported theory of our universe's origin centers on an event known as the big bang. This theory was born of the observation that other galaxies are moving away from our own at great speed in all directions, as if they had all been propelled by an ancient explosive force.
Correct Answer : 3
We humans have a total of 206 sizable bones in our bodies. There are also 6 additional bones, 3 in each ear, known as the ossicles (little bones). So the grand total is 212.
Correct Answer : Calories
Energy is measured in units of kilocalories (kcal) or kilojoules (kJ). One kilocalorie (1 kcal) is equal to 4.18 kilojoules (4.18 kJ). The amount of energy a food contains per gram is known as its energy density so we can describe fat as more energy dense than protein or carbohydrate.
