Set - 7 Flashcards
(100 cards)
The density of Air is_____________?
0
A. 0.225 kg/m3
B. 1.025 kg/m3
C. 1.225 kg/m3
D. 1.425 kg/m3
C. 1.225 kg/m3
Density of Ice is_________?
0
A. 800kg/m3
B. 917kg/m3
C. 930kg/m3
D. 1000kg/m3
B. 917kg/m3
Wind always blows from area of ________?
0
A. Low pressure to high pressure
B. High pressure to low pressure
C. Only low pressure
D. Only high pressure
B. High pressure to low pressure
Freezing point of water is__________?
2
A. 0 °C
B. -2 °C
C. -4 °C
D. None of above
A. 0 °C
The melting point of ice is_________?
0
A. 00C
B. 1000C
C. 40C
D.-40C
For ice, the melting point is 0°C or 273K.
How many Dynes are there in one gram weight?
0
A. 993
B. 981
C. 250
D. 375
B. 981
The dyne is a unit of force in the centimeter-gram-second (CGS) system of units, and it is defined as the force required to accelerate a mass of one gram by one centimeter per second squared (1 g·cm/s²).
“Ornithology” is the study of_____________?
0
A. Birds
B. Insects
C. Sea Plants
D. Sea Animals
A. Birds
‘Bar’ is the unit of___________?
0
A. Temperature
B. Heat
C. Atmospheric pressure
D. Current
C. Atmospheric pressure
One Joule is equal to__________?
3
A. 105 ergs
B. 103 ergs
C. 107 ergs
D. 1011 ergs
C. 107 ergs
Scientist discovered a previously undetected feature of the human Anatomy that could be the largest organ of human body?
A. Brass
B. Pectora
C. Interstitium
D. Otic
C. Interstitium
In 2018, scientists presented evidence suggesting that the interstitium, a fluid-filled space within tissues throughout the body, may qualify as an organ. Previously thought to be a dense connective tissue, recent research using advanced imaging techniques revealed that the interstitium is an interconnected network of fluid-filled compartments supported by collagen and elastin fibers. It is found throughout various organs and tissues, such as the skin, digestive tract, lungs, and urinary system. However, it is important to note that further research is still ongoing to fully establish its classification as an organ.
Which of the following does not pollute the air?
0
A. Nitrogen Dioxide
B. Sulfur dioxide
C. Carbon dioxide
D. none of these
A. Nitrogen Dioxide
kilohertz (kHz) is a unit which measures?
0
A. Power used by a current of one ampere
B. Electromagnetic radio wave frequencies
C. Voltage
D. Electric resistance
B. Electromagnetic radio wave frequencies
The study of heavenly bodies is known as_________?
0
A. Astrology
B. Astronautics
C. Astronomy
D. Astrophysics
C. Astronomy
Jupiter has ________ known moons.
0
A. 62
B. 73
C. 79
D.53
C. 79
Overview Jupiter has 53 named moons. Others are awaiting official names. Combined, scientists now think Jupiter has 79 moons. There are many interesting moons orbiting the planet, but the ones of most scientific interest are the first four moons discovered beyond Earth—the Galilean satellites.
Jupiter is the largest planet in our solar system, and its extensive moon system is one of its notable features. These moons vary in size, shape, and characteristics, with some of the most well-known ones being Io, Europa, Ganymede, and Callisto, often referred to as the Galilean moons. However, please note that new moons may have been discovered since my last update, so the current number may be subject to change.
In 2013, Planck measured the age of the universe at ___________?
0
A. 13.82 billion years
B. 4.53 billion years
C. 4.6 billion years
D. 4.53 billion years
A. 13.82 billion years
In 2013, the Planck satellite mission provided data that allowed scientists to estimate the age of the universe. The measurement obtained by Planck was approximately 13.82 billion years. Therefore, the correct answer is A. 13.82 billion years. This value is in line with the age of the universe as determined by other observations and measurements, such as the study of cosmic microwave background radiation and the measurements of the Hubble constant.
Human beings use _______ liters of pure oxygen per day.
0
A. 550
B. 2500
C. 1,050
D. 10,000
A. 550
The yellow colour in photochemical smog is due to the presence of____________?
0
A. Sulphur dioxide
B. Carbon dioxide
C. Nitrogen dioxide
D. CFC’s
C. Nitrogen dioxide
Why normal rain is slightly acidic?
0
A. due to presence of dust in air
B. carbon dioxide and water in clouds react to form carbonic acid
C. Ozone depletion
D. All of these
B. carbon dioxide and water in clouds react to form carbonic acid
Disolved oxygen (DO) in water should be?
A. 400 to 800 ppm
B. 4000 to 8000 ppm
C. 0.4 to 0.5 ppm
D. 4 to 5 ppm
D. 4 to 5 ppm
Dissolved oxygen (DO) in water is typically measured in parts per million (ppm) or milligrams per liter (mg/L). The appropriate range of dissolved oxygen levels in most aquatic environments to support healthy aquatic life is generally considered to be around 4 to 5 ppm (or mg/L). Therefore, the correct answer is D. 4 to 5 ppm. It’s important for the water to have sufficient dissolved oxygen for aquatic organisms to survive and thrive. However, specific DO requirements may vary for different species and environmental conditions.
Montreal Protocol 1987 was__________?
0
A. Treaty among nations to reduce nuclear arsenals
B. Climate control treaty
C. Treaty to protect ozone layer
D. Trade policy about tarrifs
C. Treaty to protect ozone layer
How many meters are in one mile?
0
How many meters in one mile? A. 1409.34 B. 1509.34 C. 1609.34 D. None of Above
C. 1609.34
As a result of which treaty, ozone hole in Antarctica is slowly healing?
0
A. Koyoto protocol
B. Ottawa treaty
C. Montreal protocol
D. Oslo Accord
C. Montreal protocol
The main culprit of greenhouse effect is Carbon dioxide. But which is the second element contributing most to greenhouse effect
A. Nitrogen Dioxide (NO2)
B. Chlorofluorocarbons (CFCs)
C. Methane (CH4)
D. High-fructose corn syrup (HFCs)
C. Methane (CH4)
The second element contributing most to the greenhouse effect is C. Methane (CH4). While carbon dioxide (CO2) is the primary greenhouse gas responsible for trapping heat in the Earth’s atmosphere, methane is the second most significant contributor. Methane is produced through natural processes such as the decay of organic matter and the digestive processes of certain animals. It is also released during human activities such as the production and transport of coal, oil, and natural gas, as well as livestock farming and waste management. Methane is a potent greenhouse gas, capable of trapping more heat than carbon dioxide over a shorter period. Reducing methane emissions is an important aspect of mitigating climate change.
Nitrogen Dioxide (NO2), Chlorofluorocarbons (CFCs), and High-fructose corn syrup (HFCs) are not significant contributors to the greenhouse effect. Nitrogen dioxide is a pollutant primarily associated with air pollution and does not have a long atmospheric lifespan. Chlorofluorocarbons (CFCs) are potent greenhouse gases, but their production has been phased out due to their destructive impact on the ozone layer. High-fructose corn syrup (HFCs) is a sweetener used in food and beverages and does not directly contribute to the greenhouse effect.
Chemical Name of Dry Ice?
0
A. Solid Carbon Dioxide
B. Calcium Carbon
C. A&B
D. Sodium Oxide
A. Solid Carbon Dioxide
