Answer:
oxygen is an element because it is a pure substance which cannot be split into simpler substances by chemical means
The answer is the last one .... The ability to do work and cause change
A law is statement about an observed concept. A theory involves the explanation of scientific concepts or principles. A hypothesis is the predicted explanation about some concepts that has to be tested in order to prove it to be right. An observation is the observing the results of a scientific experiment carried out to test an hypothesis.
Here the given statement 'A chemist mixes sodium with water and witnesses a violent reaction between the metal and water,' can be classified as an observation as it explains what the chemists observes as a result of his chemical experiment or test..
Answer:
B. Of
Explanation:
They had good taste of music.
But I think 'in' is the best preposition.
