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What term describes the process by which a seed develops and begins growing into a new, young plant?
AFertilization
BGermination
CTranspiration
DPollination
Why do most plant leaves appear green to the human eye?
ABecause chlorophyll strongly absorbs green light specifically
BBecause plants intentionally produce green pigment for camouflage
CBecause green is the only color of visible light that exists in sunlight
DBecause chlorophyll primarily absorbs red and blue light while reflecting green light
What term describes asexual plant reproduction methods, such as growing a new plant from a cutting, that do not involve seeds?
AFertilization
BGermination only
CVegetative propagation
DPollination
What term describes plants, such as cacti, that have specifically adapted to survive in very dry, arid environments?
AHalophytes only
BHydrophytes
CXerophytes
DEpiphytes only
The colorful natural light display known as the Aurora Borealis, or Northern Lights, is primarily caused by what phenomenon?
ASunlight refracting through ice crystals
BReflections of city lights off low clouds
CCharged particles from the sun interacting with Earth's magnetic field and atmosphere
DVolcanic activity beneath the polar ice caps
Which metal has the highest melting point of any metal and is commonly used for the filament inside traditional incandescent light bulbs?
AZinc
BAluminum
CCopper
DTungsten
Albert Einstein’s 1921 Nobel Prize in Physics was awarded specifically for his explanation of which phenomenon, rather than for his theory of relativity?
ANuclear fission
BThe discovery of the electron
CThe theory of general relativity
DThe photoelectric effect
What term describes the minimum speed an object must reach to break free from a planet’s gravitational pull without further propulsion, such as the roughly 11.2 kilometers per second required to leave Earth?
AOrbital velocity
BAngular velocity
CEscape velocity
DTerminal velocity
Which lightweight, corrosion-resistant metal is the most abundant metallic element found in Earth’s crust?
AIron
BCopper
CGold
DAluminum