<h3><em>Quartzite is made of the mineral quartz – a hard resistant mineral. Additionally, when the parent material (quartz-rich sandstone) undergoes metamorphic processes of heat and pressure, the resulting rock quartzite is harder than the sandstone due to an increase in density.</em></h3><h3><em>1. Hope this helps, sorry if not tho</em></h3>
In the past two decades, the number of teenage pregnancies has dropped dramatically across all ethnic groups.
<h3>Why has
teenage pregnancies has dropped dramatically across all ethnic groups?</h3>
The teenage pregnancies has dropped dramatically across all ethnic groups because of the education , there are alot of parents that are now educated to educate their children about danger of teenage pregnancies.
Also, there has been increased in protective measure by the government to reduce teenage pregnancies, hence, In the past two decades, the number of teenage pregnancies has dropped dramatically across all ethnic groups.
Learn more about teenage pregnancies on:
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a) Summer in the northern hemisphere is when days are longest. Actually, the first day of summer is the longest day, so the longest days are the ones in late spring and early summer.
b) Days and nights are equal length at the spring and fall equinoxes.
Answer:
80 x 16
Explanation:
4 x 4 x
---- = ---- ----- = -----
5 100 5 20
400 / 5 = 80 80 / 5 = 16