hope this helps The Mohs Hardness Scale ranks the order of hardness of minerals and some common objects. For example, your fingernail can scratch the minerals talc and gypsum, with a hardness of 2 or lower. A copper penny can scratch calcite, gypsum, and talc.
The regions of light and unpredictable winds at about 30° No latitudes are called <u>trade winds</u>
Answer: Option A
<u>Explanation:</u>
Trade winds are the latitudes which cool and descend at 30 degree north and are areas with surface winds but these surface winds are light and unpredictable. These are the winds that blow towards the equator.
Trade winds blow at an average speed of about 5 to 6 meters per second and these winds are unpredictable. These winds are warm winds and therefore they pick up moisture and bring heavy rainfall.
Answer:
c. at depths of about 50 to 200 km below earth's surface
Explanation:
Rocks begins to melt when sufficient temperature and pressure is applied on them.
To attain these conditions of temperature and pressure, a rock must be taken deep into the earth. With depth, the geothermal gradient of the earth increases. The geothermal gradient determines the temperature conditions a rock might exposed to deep within the crust. Rocks usually melt below the crustal levels and at the mantle.
The crust runs from about 0-100km in depth and the mantle takes off from there. We expect melting to fall beyond this region.
I'm am unsure what context the answer needs to be in or how specific they need to be. Minerals are used in most building supplies, fertilizers, cooking ingredients, and machinery.
