Everyday Science — All MCQs
2717 questions available
Q801.Anti Diuretic hormone is secreted by one of the following glands?
Correct Answer: A
ADH (Anti-Diuretic Hormone) is secreted by the pituitary gland.
Q802.Any disease or infection that is naturally transmissible from vertebrate animals to humans is called?
Correct Answer: B
A disease naturally transmissible from vertebrate animals to humans is called a zoonosis.
Q803.Apart from Venus, which planet rotates from east to west?
Correct Answer: C
Besides Venus, Uranus also rotates from east to west (retrograde rotation), due to its extreme axial tilt.
Q804.Aphasia is the inability to do what?
Correct Answer: B
Aphasia is a condition that impairs a person's ability to communicate — speak, understand, read, or write.
Q805.Approximately how many Galaxies are there ?
Correct Answer: B
Current estimates suggest there are approximately 100 billion (or more) galaxies in the observable universe.
Q806.Approximately, how many times each day do our heart valves open and close normally?
Correct Answer: B
The heart's valves open and close roughly 100,000 times each day under normal conditions.
Q807.Archeology is the branch of:
Correct Answer: A
Archaeology is generally classified as a branch of anthropology, focused on studying past human societies through material remains.
Q808.Arthritis is a disease of ?
Correct Answer: C
Arthritis is a disease involving inflammation and disorder of the joints.
Q809.As a result of which treaty, ozone hole in Antarctica is slowly healing?
Correct Answer: C
The Montreal Protocol (1987), which phased out ozone-depleting substances, is responsible for the gradual healing of the ozone hole over Antarctica.
Q810.As comets get close to the sun, they start to melt” and release gas and dust. This gas and dust forms what?
Correct Answer: A
As comets approach the Sun, the heat causes ice to sublimate, releasing gas and dust that form a glowing 'coma' around the nucleus and a tail pointing away from the Sun.
Q811.As the temperature of ice rises, the ice melts and its density?
Correct Answer: C
As ice melts and its temperature rises toward 4°C, the resulting water's density increases (water is densest at 4°C).
Q812.As we go higher into the atmosphere, the air becomes?
Correct Answer: A
As altitude increases, air pressure and density decrease, making the air thinner.
Q813.As you go down into a well, your weight____?
Correct Answer: B
As you descend into a well (toward Earth's center), your weight slightly decreases because less mass is pulling you downward from below.
Q814.Asteroids are made mostly of?
Correct Answer: B
Asteroids are composed mostly of rock and metal, remnants from the early Solar System.
Q815.At night, Plants intake ____ and release ____?
Correct Answer: A
At night, without sunlight for photosynthesis, plants take in oxygen and release carbon dioxide through respiration.
Q816.At what angle above the horizon must the sun be to create a rainbow?
Correct Answer: C
A rainbow forms when the sun is at an angle of about 40 degrees or less above the horizon, opposite the observer.
Q817.At what temperature are Celsius and Fahrenheit equal?
Correct Answer: A
Celsius and Fahrenheit scales intersect (read the same value) at -40 degrees.
Q818.At what temperature does silver melt?
Correct Answer: C
Silver melts at a temperature of 961.8°C.
Q819.At what time of day is the relative humidity normally at a minimum ____ ?
Correct Answer: A
Relative humidity is typically at its minimum in the afternoon when air temperature is at its highest, since warm air can hold more moisture.
Q820.At which temperature does bacteria die?
Correct Answer: C
Most disease-causing bacteria die at temperatures around 149°F (65°C) or higher through sustained heating.