MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
A. Wind
Explanation
Wind energy is generated by the uneven heating of the Earth’s surface, which causes air to move and create wind.
Correct answer
A. Copernicus
Explanation
Nicolaus Copernicus, a Renaissance-era mathematician and astronomer, is often referred to as the modern father of astronomy. He is renowned for his heliocentric model of the solar system, which proposed that the Sun, rather than the Earth, is at the center of the solar system, with the planets, including Earth, orbiting around it. Copernicus’s work laid the foundation for modern astronomy and revolutionized our understanding of the cosmos.
Correct answer
D. 1055 joules
Explanation
1055 joules is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Disorder of the Joints
Explanation
Disorder of the Joints is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Rainfall
Explanation
Rainfall is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Quinoline is an inhibitor
Explanation
Quinoline is an inhibitor is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Lead
Explanation
ead is one of the most stable elements because it is the end product of many radioactive decay chains, meaning it doesn’t undergo further radioactive decay under normal conditions. Uranium is highly unstable and radioactive, while hydrogen and oxygen are reactive elements.
Correct answer
A. 7%
Explanation
7% is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Heliograph
Explanation
Heliograph is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Stratosphere
Explanation
Stratosphere is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.