Science Flashcards
Why a small pouch containing silica gel is often found in bottles of medicine in tablet or powder form?
[absorbs moisture]
Notes:
Silica gel granule is a network of inter-connecting microscopic pores, which attract and hold moisture by the phenomena known as absorption.
Wifi uses……………… in order to transmit data whereas Li-fi uses…………… in order to transmit data
radio waves, visible light
Liquid Crystals are used in
Pocket calculator
display devices
wristwatches
Branch of medicine concerned with the study of cancer is
Oncology
who invented smallpox vaccination
Edward Jenner
Who invented ballpoint
John J. Loud.
When was the Zika virus first isolated?
1947
Lysosomes, which are known as suicide bags, are produced by which organelle?
Golgi Body
Which is the only regenerative organ in the human body?
The liver is the only human internal organ capable of natural regeneration of lost tissue.
Entomology is the science that studies
Insects
What is the pH value of human blood?
7.40
Which gases are lighter than air?
Hydrogen, helium, neon, nitrogen, ammonia, methane and carbon monoxide.
Oxygen, fluorine, chlorine, hydrogen chloride, carbon dioxide, sulfur dioxide, and hydrogen sulfide are heavier than air
name the scientist who is known as the father of modern genetics
Gregor Mendel
Gregor Mendel, known as the “father of modern genetics,” was born in Austria in 1822. A monk, Mendel discovered the basic principles of heredity through experiments in his monastery’s garden.
which color of heat radiation represents the highest temperature
White
What does airbag, used for the safety of car drivers, contain?
sodium azide
Cloves, used as spice are derived from which of the following plant parts?
Flower buds
what is the full form of scanning technique called cat
Computed axial tomography (CAT)
who invented the computer mouse
Douglas Engelbart
The chief constituent of gobar gas is
Methane
a feature Bluetooth now common in mobile phones gets its name from a
tenth-century king Harald Bluetooth
the Leaning Tower of Pisa does not fall because
its center of gravity has been carefully kept within its base
Potential Energy is described by the expression
PE=mgh
After death, which is usually empty of blood
Arteries and veins
Metals that can be easily beaten into sheets is known as
Malleable
Munchausen refers to
A mental disorder in which affected person fakes or exaggerates illness to gain attention and treatment
Leukemia is a disease related to
Blood
Which is the largest gland in human body?
Liver
The largest living flightless bird
Ostrich
The blood aorta from
left ventricle
Desert plants would be characterized by
Sunken Stomata
Why sprouted gram considered more nutritious?
Germinating seeds produce enzymes which are a rich source of protein
The edible portion of which vegetables is not a stem?
Corn of Colocasia
You are standing in a lift. The force on the floor of the lift due to your weight will:
A) become zero when the lift moves up with an acceleration of 9.8 m/s2
B) become zero when the lift moves down with an acceleration of 9.8 m/s2
C) become zero when the lift moves with an acceleration of 9.8 m/s2 in any
direction
D) remain unchanged whatever be the value of the acceleration of the lift
become zero when the lift moves down with an acceleration of 9.8 m/s2
The body’s thermostat is in the
hypothalamus
Diphtheria is a disease affecting
throat
Air-conditioning was invented by
Willis Carrier
Who invented the motorcycle?
Gottlieb Daimler
itching due to insect bite is caused by
Formic acid
A galvanometer is an instrument to measure
electric current
nephrons are the part of human
excretory system
kidney,
the structure that actually produces urine in the process of removing waste and excess substances from the blood. There are about 1,000,000 nephrons in each human kidney.
the speed of light in vacuum baby expressed in Mach numbers
Mach 9,00,0000
Aspirin is a common name for
acetylsalicylic acid (ASA)
AT a particular speed a bus starts vibrating violently due to the phenomenon of
Phenomenon is resonance:
When the frequency of the engine becomes equal to the body of the vehicle, some parts of the vehicle start vibrating violently. Due to resonance rattling sound is heard.
metal that is most abundant in the earth is
Aluminum
Aluminum is the most abundant metal in the Earth’s crust, and the third most abundant element therein, after oxygen and silicon.
A passing motorcycle causes distortion or disturbance with the reception of the signal in radio and T.V. The cause of this is :
The spark plug fitted in the engine produces electromagnetic signal due to sparking and this causes a disturbance in the signal.
the first metal used by man was
Copper
human saliva contains enzymes necessary for The breakdown of
starches
water-retaining plants adapted to arid climates are known as
xerophytes/ succulents
Plants adapted to living in dry environments such as succulents are termed xerophytes. However, not all xerophytes are succulents, since there are other ways of adapting to a shortage of water, e.g., by developing small leaves which may roll up or having leathery rather than succulent leaves.