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A kaleidoscope, a popular toy that produces colorful, symmetrical patterns when rotated, relies primarily on which optical principle?
AAbsorption of light by colored filters only
BReflection of light off multiple angled mirrors, creating repeating patterns
CDiffraction through a narrow slit only
DRefraction of light through a single large lens
Traditional lead-acid car batteries, still commonly used to start vehicle engines, rely on which acid as their electrolyte?
AAcetic acid
BSulfuric acid
CNitric acid
DHydrochloric acid
Why does food generally cook faster in a pressure cooker compared to an ordinary open pot?
ABecause a pressure cooker uses significantly more electricity
BBecause pressure cookers always use higher flame settings
CBecause trapped steam increases internal pressure, which raises the boiling point of water and cooking temperature
DBecause a pressure cooker removes oxygen from the food
The periodic table, which organizes all known chemical elements, is primarily arranged in order of increasing what property?
AMelting point
BAtomic number
CDiscovery date
DAlphabetical order of element names
Ethylene, a naturally occurring plant hormone in gas form, is commonly used commercially for what agricultural purpose?
ATo kill weeds permanently
BTo help fruits like bananas ripen more quickly
CTo fertilize soil directly
DTo preserve fruit indefinitely without ripening
Why does water boil at a lower temperature at high-altitude locations, such as near the summit of a tall mountain, compared to sea level?
ABecause atmospheric pressure is lower at higher altitudes
BBecause mountain water contains more dissolved minerals
CBecause mountain air is significantly colder overall
DBecause gravity is weaker at higher altitudes
On the periodic table, what are the vertical columns and horizontal rows respectively called?
ABoth rows and columns are simply called groups
BBoth rows and columns are simply called periods
CRows are called groups, and columns are called periods
DColumns are called groups, and rows are called periods
Beyond its common use as a food ingredient for baking, sodium bicarbonate, or baking soda, can also be used for what practical safety purpose?
AAs fuel for vehicles
BAs a simple agent to help smother small kitchen grease or electrical fires
CAs a strong industrial acid
DAs a substitute for drinking water
Materials like rubber and plastic, which do not allow electric current to pass through them easily, are known as what?
AInsulators
BConductors
CSuperconductors
DSemiconductors
In chemistry, what term describes the standard unit used to measure the amount of a substance, based on a specific, extremely large number of particles?
ALiter
BGram
CMole
DMolarity only