Answer:
The lower the pH, the greater the acidity of a substance. so a very acidic pH level ranges from 1-3.
The higher the pH, the greater the basic a substance is. so a very basic pH level ranges from 11-14
Calcites approximate hardness is 3
<h2>D) is the correct option </h2>
Explanation:
- Conservation tillage conserves soil by reducing erosion
- In the Midwest, erosion by water is the primary concern, whereas western regions of the country are more susceptible to wind erosion
- Soil erosion removes the productive layer of topsoil, reducing crop yields and land value
- Soil removed from fields eventually ends up as sediment in streams, rivers, or lakes
- Sediment collects in surface waters, reducing their water-holding capacity and some crop nutrients and pesticides attach to soil particles and are carried and deposited in waterways along with the soil
- Conventional tillage, such as moldboard plowing, leaves the soil surface bare and loosens soil particles, making them susceptible to the erosive forces of wind and water
- Conservation tillage practices reduce erosion by protecting the soil surface and allowing water to infiltrate instead of running off
Speed is given by dividing distance by time.
That is; speed = distance/time
In this case; speed = 52 mph and the time is 1.5 hours
Distance= speed × time
Thus; Distance = 52 × 1.5
= 78 miles
Thus the cities are 78 miles apart
the fossil is younger than the one below
