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What is a primary function of the spleen in the human body?
AProducing digestive enzymes
BFiltering blood and removing old or damaged red blood cells
CProducing sound for the voice
DRegulating body temperature
Which method of heat transfer involves the movement of heated fluid, such as warm air or water, from one place to another?
ARadiation
BConvection
CConduction
DReflection
What is the key difference between an object’s mass and its weight?
AWeight is constant everywhere, while mass depends on gravity
BMass is measured in newtons, while weight is measured in kilograms
CMass and weight are exactly the same thing
DMass is constant everywhere, while weight depends on the local strength of gravity
Fractional distillation of crude petroleum separates it into various products mainly based on differences in what property?
AColor
BSmell
CBoiling point
DDensity alone
Which part of the human digestive system is primarily responsible for absorbing most nutrients from digested food?
AStomach
BLarge intestine
CSmall intestine
DEsophagus
Which method of heat transfer occurs through direct contact between particles, and works best in solids like metals?
ARadiation
BConvection
CEvaporation
DConduction
In chemistry, what is a pure substance made up of only one type of atom called?
AA mixture
BAn element
CA solution
DA compound
What term describes large molecules, such as those found in plastics, that are made of many repeating smaller units bonded together?
APolymers
BIsotopes
CAlloys
DCatalysts
What is a primary function of the large intestine in the digestive process?
AAbsorbing the majority of nutrients from food
BAbsorbing water from remaining digested material and forming solid waste
CBreaking down proteins with strong acid
DProducing insulin
Which method of heat transfer does not require a medium and allows heat, such as from the sun, to travel through the vacuum of space?
ARadiation
BConvection
CAbsorption
DConduction