Answer:
Fluoride is commonly used in dentistry to strengthen enamel, which is the outer layer of your teeth. Fluoride helps to prevent cavities. Fluoride also helps stop the decay process and prevent tooth decay.
Explanation:
Answer:
Depending on the tribe and the area they lived in, Native Americans got their food by different methods including farming, hunting, fishing, and gathering. Most tribes used a combination of these four ways to get their food, but many specialized in one area such as farming or hunting.
Explanation:
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Answer:
true
Explanation:
Rocks have different properties such as hardness and texture
Metamorphic rocks form when heat and pressure cause sedimentary or igneous rocks to recrystallize into new rock.
Soil is made up of dirt with decomposed organic material
Answer:
D.
They have a positive charge and are present in the nucleus of an atom along with the neutrons.
explanation:
Protons have a positive charge.
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
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