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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
What term describes the number of protons found in the nucleus of an atom?
AIsotope number
BMass number
CValency
DAtomic number
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
Which part of the human digestive system is primarily responsible for absorbing most nutrients from digested food?
AStomach
BLarge intestine
CSmall intestine
DEsophagus
How does a vacuum flask, commonly called a thermos, keep drinks hot or cold for extended periods?
ABy actively heating or cooling the liquid inside
BBy adding chemical coolants
CBy using a sealed vacuum layer that greatly reduces heat transfer
DBy constantly stirring the liquid
In chemistry, what term describes the combining capacity of an element, or how many bonds it can typically form?
ADensity
BValency
CSolubility
DMolarity
What process, involving heating rubber with sulfur, was developed to make natural rubber more durable and elastic?
ASaponification
BVulcanization
CFermentation
DElectrolysis
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
What causes the buildup of static electricity, such as when a balloon sticks to hair after rubbing?
ASudden temperature change
BTransfer of electric charge between surfaces through friction
CA chemical reaction between materials
DAbsorption of light energy
Which of the following is a typical physical property of most metals?
ABrittle and poor conductors of electricity
BMalleable, ductile, and good conductors of electricity
CAlways gases at room temperature
DAlways transparent