Everyday Science

Everyday Science subject is comprise of Biology, Chemistry, Physics, Environmental Science, Geography and Engineering Subjects. This section also carries MCQs about how and why, science shapes our daily lives. Everyday Science or EDS is one of the compulsory subjects in CSS. It is also part of most of general tests conducted by different testing services and government departments, schools or colleges.

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    Everyday Science
    Which unit of measurement is used to calculate gas bills?
    Gas bills are charged in British thermal units (BTU). A BTU is a unit of energy equal to the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. Gas bills are typically calculated by multiplying the number of BTUs used by the price per BTU.
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    Everyday Science
    Which is the sensitive layer of the eye?
    The retina is the sensitive layer of the eye. It is located at the back of the eye and contains light-sensitive cells called rods and cones. These cells convert light into electrical signals that are sent to the brain, where they are interpreted as images.
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    Everyday Science
    Which is the main culprit in the thinning of the ozone layer?
    The main culprit in the thinning of the ozone layer in the earth’s stratosphere is chlorofluorocarbons (CFCs). CFCs are man-made chemicals that were once widely used in refrigerators, air conditioners, and other appliances. When CFCs reach the stratosphere, they react with ozone molecules, breaking them down. This thinning of the ozone layer allows more harmful ultraviolet radiation from the sun to reach the Earth’s surface, which can cause skin cancer, cataracts, and other health problems.
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    Everyday Science
    Which is the longest bone in the human body?
    The longest bone in the human body is the femur, or thigh bone. It is located in the upper leg and connects the hip to the knee. The femur is typically about 20 inches long in adults. It is a strong and sturdy bone that helps to support the weight of the body and allows for movement of the leg.
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    Food Science
    Which is the staple vegetable in Pakistani diet?
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    Coordination and Control
    What gives the inner eye its dark color?
    The dark color of the inner eye is given by the choroid. The choroid is a layer of tissue that lies between the retina and the sclera (the white part of the eye). It is rich in blood vessels and contains a pigment called melanin, which gives it a dark brown color. The choroid helps to nourish the retina and protect it from damage.
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    Atomic Structure
    The mass of a neutron is
    The mass of a neutron is about the same as that of a proton. A neutron is a subatomic particle with no net electric charge and a mass slightly greater than that of a proton. Together with protons, neutrons make up the nucleus of an atom. The mass of a neutron is 1.67492749804 × 10−27 kg, which is slightly greater than the mass of a proton, which is 1.672621777 × 10−27 kg. The mass of an electron is much smaller, at 9.10938356 × 10−31 kg.
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    Everyday Science
    What is the most important piece of hardware in a computer?
    The most important piece of hardware in a computer is the Central Processing Unit (CPU). The CPU is the brain of the computer and is responsible for carrying out all of the instructions that are given to it. Without a CPU, the computer would not be able to function. The mouse, keyboard, and monitor are all important pieces of hardware, but they are not as essential as the CPU. The mouse is used to point and click on objects on the screen, the keyboard is used to enter text, and the monitor is used to display the output of the computer. However, all of these devices can be replaced or substituted with other devices. For example, a computer can be controlled by a joystick or a touchscreen instead of a mouse, and a computer can be displayed on a TV or a projector instead of a monitor.
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    Basic Concepts of Physics
    The ratio of the velocity of the body to the velocity of the sound is called
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    Everyday Science
    The term vitamin was introduced by:
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