Ideally, an observatory is located where nothing is present to interfere with incoming starlight. Which of these sites would be
1 answer:
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Answer: Option (b) is the correct answer.
Explanation:
A compound is defined as the substance in which different elements are chemically combined together in a fixed ratio by mass.
For example, is a compound and elements are present in 1:4 ratio.
A compound can be divided into its constituent or simpler substances.
On the other hand, a molecule is defined as a specie that contains same type of elements.
For example, is an oxygen molecule.
And, an element is defined as a substance which is made up of only one type of atoms. An element can never be broken down into its constituent particles.
For example, a piece of lithium metal will contain atoms of lithium only.
Thus, we can conclude that the statement elements are made up of one kind of atom best explains how elements can be distinguished from molecules and compounds.
A raised-bed garden is a type of gardening method in which the vegetables and other small plants are grown in garden boxes kept elevated above the ground. These garden boxes are kept separated from each other.
The advantages of having a raised-bed garden are:
1. The movement of harmful pest from crop to another is hindered.
2. It prevent the compaction of the soil.
3. It stops the propagation and growth of weeds from one box to another.
4. It provides better drainage of water from the soil.
5. The walls of the garden box prevent the erosion of the soil.
6. The garden boxes conserve space.
Hence the answer will be B. conserve water and space for growing and limit compaction of the soil.
