AICE Enviromental
What is the definition of niche?
Specific role in the ecosystem.
What is the largest biome on Earth that covers about 70% of the planet´s surface?
The ocean (marine biome)
What type of bond forms with two non-metals?
covalent bond
What organelle is known as the “powerhouse of the cell”?
Mitochondria
What is the most abundant element in the universe?
Hydrogen
What ecological concept describes the variety of species, genes, and ecosystems within a region?
Biodiversity
What process causes nutrient-rich deep water to rise to the ocean surface, supporting phytoplankton growth?
Upwelling
What is the pH of a neutral solution at 25°C?
7
What molecule carries genetic instructions in most living organisms?
DNA
What planet in our solar system has the most moons?
Saturn
What process converts atmospheric nitrogen into a usable form like ammonia for plants?
Nitrogen fixation
What marine zone begins about 200 meters deep where sunlight is no longer sufficient for photosynthesis?
The aphotic zone.
What principle states that if a system at equilibrium is disturbed, it will shift to counteract the change?
Le Chatelier’s Principle
What process produces genetically identical cells for growth and repair?
Mitosis
What is the only metal that is liquid at room temperature?
Mercury
What international agreement aims to reduce global greenhouse gas emissions to limit warming to about 1.5–2°C?
The Paris Agreement
What symbiotic algae live inside coral tissues and provide energy through photosynthesis?
Zooxanthellae
What hybridization occurs in methane (CH₄)?
sp³ hybridization
What type of RNA carries amino acids to the ribosome during protein synthesis?
tRNA (transfer RNA)
What unit is used to measure electrical resistance?
Ohm
How is photochemical smog formed?
nitrogen oxides and volatile organic hydrocarbons react with heat and sunlight to produce a variety of pollutants.
What global urrent system circulates water through the Atlantic, Pacific, and Indian Oceans based on temperature and salinity differences?
Thermohaline circulation (The Global Conveyor Belt)
What law states that the pressure of a gas is inversely proportional to its volume when temperature is constant?
Boyle’s Law
What biological process allows plants to convert light energy into chemical energy?
Photosynthesis
What famous physicist developed the theory of general relativity?
Albert Einstein