6 questions · timed · auto-graded
Atmosphere of Mars is rich in ____________.
Atmosphere of Mars is rich in Carbon dioxide.
Explanation:
Atmosphere of Mars is composed of 95.32% CO2, 2.7% Nitrogen, 1.6% Argon, 0.13% Oxygen and 0.8% carbon monoxide.
CFCs are carbon compounds having both ___________ and chlorine.
CFCs are carbon compounds having both Fluorine and chlorine.
Explanation:
Chlorofluorocarbons are organic compounds that have carbon, fluorine and chlorine.
Surface temperature of moon varies from -190° to __________.
Surface temperature of moon varies from -190° to 110°.
Explanation:
It is 110 degree at day and minus 170 at night. Moon doesn’t have an atmosphere & water vapour to diminish sun at day and retain heat at night. So either moon has 100% solar energy or completely lacks it.
__________ makes soil porous and allows water and air to peneterate deep underground.
Humus makes soil porous and allows water and air to peneterate deep underground.
Explanation:
Humus is organic due to large content of organic carbon. It retains moisture in the soil and loosens the soil thus allowing water and air to penetrate deep underground thus increasing the soil organisms which provide nutrients to the plant.
Earthworms are __________ which are involved in paedogenesis.
Earthworms are Detritivores which are involved in paedogenesis.
Explanation:
Paedogenesis is decomposition by bacteria and fungi during which organic material is broken leading to humification and mineraliation. Earthworm is a detritivore that consumes organic matter and add excretory nitrogen to soil.
Atmosphere of Earth is rich in ___________.
Atmosphere of Earth is rich in Nitrogen.
Explanation:
Atmosphere of earth is 78% nitrogen, 21% oxygen, 0.9% argon and 0.3% carbon dioxide.