Over time, acid in plaque ________ to break down the tooth's surface and causes tooth decay.

_______________ art materials changes according to the period and to the geographic locations.

The value of _________ by its functions in the exchange activity

Known as the holy river of Hindus, _______ contains resistant bacteria to the most commonly used antibiotics

_____________ of a turbine turns the wind into electricity

The size of the mouth, nose, and throat controls __________

______________ helps doctors to determine the cause of the illness

Sore throats _________ by viruses and allergies

________________ of the moon is only one-sixth that of the Earth

The distance between the earth and the moon _______ 238,900 miles

The differences __________ are in heat releasing and heat absorbing

__________ silver chloride in 1801, which ended up in UV discovery

Open wounds ____________ to infect our bodies through the bloodstream

Hugo Grotius, the founding father of modern international law, _______ at age fifteen

The first model of the internet known as ARPANET ______ in the late 1960s

Electromagnetic waves ______ and received through the air at the speed of light.

Funds needs __________ Lincoln to print banknotes in 1862

The first copyright to be regulated by the government, the Anne Statute, _______ in 1710

Adenosine triphosphate ___________ storing chemical energy

__________ the only bees that can reproduce even though worker bees are also female.