All Free Everyday Science MCQs with Answers

601. The severity of 2005 earthquake in Pakistan on Richter scale was ?

• A. 6.9
• B. 7.6
• C. 7.1
• D. none

Explanation: The 8 October 2005 Kashmir earthquake in Pakistan had a commonly reported magnitude of 7.6 on the Richter scale. The nearby values 6.9 and 7.1 do not match the standard reported magnitude.

602. The unit to measure the quantity of Ozone in atmosphere is?

• A. Dobson
• B. Dalton
• C. Cuolomb
• D. none

Explanation: The Dobson unit measures the total amount of ozone in an atmospheric column. Dalton is a unit of atomic mass, while coulomb measures electric charge.

603. The earth's ___________ is divided into 15 major plates of various sizes

• A. Mesosphere
• B. Stratosphere
• C. Lithosphere
• D. None

Explanation: The lithosphere is the rigid outer layer of Earth and is broken into major and minor tectonic plates. The mesosphere and stratosphere are atmospheric layers, not the plates themselves.

604. UV light falls in the category of___________?

• A. Ionizing Radiations
• B. Non Ionizing Radiation
• C. Visible light
• D. None

Explanation: Ultraviolet radiation is conventionally grouped as non-ionizing radiation in basic science because most UV lacks enough energy to remove electrons from atoms. Very high-energy extreme UV can approach or produce ionization, but that exception is not intended here.

605. Equator passes through one of these countries___________?

• A. Saudi Arabia
• B. Italy
• C. Japan
• D. None

Explanation: The Equator crosses countries such as Ecuador, Kenya, Indonesia and Brazil, but it crosses none of the three countries listed. Hence, 'None' is correct.

606. The sunlight can reach a depth of___________meters in the ocean

• A. 80
• B. 200
• C. 120
• D. None

Explanation: Useful sunlight generally penetrates the ocean's euphotic zone to about 200 metres, although the exact depth varies with water clarity. Below this zone, photosynthesis becomes very limited.

607. Albatros is__________?

• A. A sea bird
• B. A beetle
• C. A fruit
• D. None

Explanation: An albatross is a large ocean-going seabird known for its very long wings and efficient gliding over the sea. It is neither a beetle nor a fruit.

608. The Green House Effect is caused by an excess of ?

• A. Carbon dioxide
• B. Carbon monoxide
• C. Carbon tetrachloride
• D. None of the above

Explanation: Carbon dioxide absorbs outgoing infrared radiation and helps trap heat in the atmosphere, strengthening the greenhouse effect when its concentration rises. Other greenhouse gases also contribute, but carbon dioxide is the intended option here.

609. Most of the ozone in the atmosphere is concentrated in the _____________?

• A. Mesosphere
• B. Troposphere
• C. Stratosphere
• D. ionosphere

Explanation: The stratosphere contains the ozone layer, where most atmospheric ozone absorbs harmful ultraviolet radiation. The troposphere contains most weather but only a small amount of ozone.

610. The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________?

• A. Diatonic scale
• B. Fahrenheit Scale
• C. Richter scale
• D. Celsius Scale
• E. None of these

Explanation: A seismograph records earthquake vibrations, while the Richter scale expresses the earthquake's magnitude. The other scales listed measure temperature or are unrelated.