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Correct answer
C. 4.54 billion years
Explanation
4.54 billion years is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. X-rays
Explanation
X-rays is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Distant objects clearly
Explanation
Distant objects clearly is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Gas
Explanation
Gas is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Green
Explanation
The colours which cannot be obtained by mixing of two or more colours are called primary colours. Red, yellow and blue are primary colours. Hence, Green is not a primary colour.
Correct answer
C. Over the Atlantic Ocean
Explanation
Over the Atlantic Ocean is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Arthrology
Explanation
Arthrology is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Heart
Explanation
Heart is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. the birth rate is high in developing countries
Explanation
the birth rate is high in developing countries is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Painite
Explanation
Painite is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.