The question is asking us to complete the following sentence: "The resources that are provided by Earth are known as _______ resources. These resources are for example oil, coal and wind power - they are provided by the Earth. We call those resources "natural" resources - the correct option is A. Natural resources can be both renewable (such as wind) and non-renewable, such as coild and oil (they take too long to be renewed so if we use them up, we won't have any more).
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By siltation, as part of the bed load
<span>because workmen were digging for the foundations of a summer palace for the King of Naples</span>
A glacial valley cross-sectional shape is a U shape whereas a stream valley is usually a V shape. The U shape comes from the scouring action of the alpine glaciers which carries rocks with it which can abrade the walls of the valley and the glacier occupies the whole valley so scours out such a shape whereas the stream cuts down and water washes in from the sides of the valley into the stream or river creating the V shape.
Answer:
The correct option is: 2,250,000 kg
Explanation:
Given
: Area A = 1 ha (Hectare) = 10,000 m²
Bulk density = 1.5 Mg/m³ = 1.5 × 1000 kg/m³ = 1500 kg/m³ (∵ 1 Mg=1000 kg)
Depth of soil = 15 cm = 0.15 m (∵ 1 m = 100 cm)
Volume can be calculated by:
Volume = area × Depth = 10,000 m² × 0.15 m = 1500 m³
As we know, density = mass/ volume
Therefore, <u>Mass of soil</u> = Bulk density × volume = 1500 kg/m³ × 1500 m³ = 2,250,000 kg
