Answer:
B. An atom is a solid sphere
Explanation:
The idea that the atom was a solid sphere paved back to the first atomic model in the <em>19th century</em> theorized by <em>John Dalton</em>. According to him, an atom is <u>intact and hard and cannot be broken down or divided</u>.
However, many scientists continued to research and it was found that <em>the atom was not actually a solid sphere.</em> It was made up of<em> protons (positively-charged), electrons (negatively-charged) and neutrons (neutrally-charged). </em>This invalidated Dalton's solid sphere model.
Answer:
Diamonds, gold, kaolin, gypsum, tin, and various gemstones, including tanzanite, are mined in Tanzania. Gold is an important resource and the country's most valuable export. There are large exploitable deposits of coal in the southwest, phosphate deposits in Arusha, and nickel in the Kagera region.
<span>Metamorphic rocks different from igneous or sedimentary rocks in that they are not directly created in their present form. Instead, metamorphic rocks take them basis from other types of existing, already in place, which are then acted upon by geological forces over extreme periods of time to turn into this final rock type. Most specifically, those forces are A. heat and pressure.</span>
A downtrend in communicable diseases A focus on prevention
Reduced neonatal mortality rates
Answer:
higher gni per capita
lower percent of population working in agriculture
lower telephones per capita
lower perceny of population who is illiterate
lower infant mortality rate