chemistry
This term describes a reaction that releases heat energy into its surroundings
What is an exothermic reaction?
This term refers to the point on the Earth's surface directly above the focus of an earthquake.
What is the epicenter?
Malicious activities conducted through internet networks to disrupt national infrastructure, banks, or security systems fall under this threat category.
What are cyber threats (or cyber warfare/attacks)?
The rate of change of displacement with respect to time, which includes both magnitude and direction.
What is velocity?
Organisms that break down dead organic matter and waste, recycling nutrients back into the ecosystem.
What are decomposers?
This lab technique is used to separate a soluble solid from a liquid by boiling off the solvent.
what is crystallization? (evaporation to dryness)
This type of plate boundary forms deep ocean trenches and volcanic island arcs when two oceanic plates collide.
What is a oceanic-oceanic convergent boundary?
Singapore’s policy approach towards cultural diversity that allows ethnic groups to retain their cultural identities while sharing common public spaces.
What is integration?
Newton's law stating that an object will remain at rest or in uniform motion unless acted upon by a resultant force.
What is Newton's First Law of Motion?
The metabolic process occurring in human muscle cells during intense exercise when oxygen supply is insufficient, producing this byproduct.
What is lactic acid (or anaerobic respiration)?
This air pollutant, responsible for acid rain, is primarily emitted from the burning of fossil fuels containing sulfur impurities.
What is sulfur dioxide?
A sampling method where data points are selected at regular, predetermined intervals along a transect line.
What is systematic sampling?
This term describes the integration of regional economies, cultures, and societies through global networks of trade and communication.
What is globalization?
The rate at which energy is transferred or work is done, measured in Watts (W).
What is power?
Biological catalysts made of proteins that speed up metabolic reactions by lowering this specific threshold.
What is activation energy?
This term defines a substance that increases the rate of a chemical reaction without being chemically changed at the end
Steep-sided volcanic cones formed by alternating layers of lava and ash, commonly found at convergent plate boundaries, are called this.
What are stratovolcanoes (or composite volcanoes)?
This core principle of governance in Singapore ensures individuals are rewarded based on their effort and talent, rather than background or status.
What is meritocracy?
The distance between two consecutive wavefronts or corresponding points on adjacent waves (e.g., crest to crest).
What is wavelength?
In a food web, energy is lost at each trophic level through processes like respiration, excretion, and unconsumed parts, resulting in only approximately this percentage of energy being transferred to the next level.
What is 10 percent?
Giant covalent structures like diamond and graphite consist entirely of carbon atoms, but graphite can conduct electricity along its layers because each carbon atom forms only three bonds, leaving behind this type of mobile charge carrier.
What are delocalized electrons?
Responsible travel to natural areas that conserves the environment, sustains the local community, and involves education is termed this.
What is ecotourism?
The framework in Singapore that encourages citizens, community groups, and the government to work together to solve public issues.
What is shared responsibility (or government-citizen partnership)?
The transfer of thermal energy through a fluid medium via density differences caused by temperature changes.
What is convection?
Finger-like projections in the small intestine that increase surface area for the rapid absorption of digested nutrients.
What are villi (singular: villus)?