The pyramid of energy in any ecosystem is _________?
The pyramid of energy in any ecosystem is _________?
A. Always upright
B. May be upright or invented
C. Always inverted
D. Always Circle
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Pure limestone is called _______?
Pure limestone is called _______?A. Aluminum Oxide
B. Calcium Carbonate
C. Calcium Sulphate
D. None of theseA chronometer meter measures__________?
A chronometer meter measures__________?A. Sound waves
B. Time
C. Color contrast
D. Water wavesThe purpose of a chronometer is to measure accurately the time of a known fixed location, for example Greenwich Mean Time (GMT).
Chronometer is invented by________?
Chronometer is invented by________?A. Robert Fulton
B. Nikola Tesla
C. Martin Cooper
D. John HarrisonAir contains maximum amount of__________?
Air contains maximum amount of__________?A. oxygen
B. nitrogen
C. hydrogen
D. carbon dioxideVery High Frequency (VHF) have __________ wavelengths?
Very High Frequency (VHF) have __________ wavelengths?A. shorter
B. shortest
C. longer
D. longest
Very High Frequency (VHF) have shorter wavelengths? Very high frequency is the ITU designation for the range of radio frequency electromagnetic waves from 30 to 300 megahertz, with corresponding wavelengths of ten to one meters.The Summer solstice in the Northern Hemisphere happens on: __________?
The Summer solstice in the Northern Hemisphere happens on: __________?A. 21 July
B. 22 December
C. 22 March
D. 21 June