Answer the following statement(s) true (T) or false (F)

Question

1.At the end of the nineteenth century, Henrietta Leavitt studied a special type of star whose brightnessseems to vary in a regular pattern. These were known asCepheid variables.
2.Red-shifted objects were those remote objects in the universe that seemed to be moving toward the Earth.
3.The big bang theory had no explanation for the source of cosmic background radiation (CBR). The steady state theory, however, predicted it.
4.The process by which protons smashtogether to form helium nuclei is known as fission.
5.The Hertzprung–Russell (H–R) diagram is a graph that plots the real brightness ofeach star against its surface temperature.

Answer 1

1.True
Explanation: At the end of the nineteenthcentury Henrietta Leavitt, an American astronomer,studied a special type of star whose brightnessseems to vary in a regular pattern. These were known asCepheid variables, after the constellation of Cepheus inwhich they were first detected.
2.False
Explanation: Mostremote objects in the universe seemed to be red-shifted.In other words, they seemed to be moving away from theEarth.
3.False
Explanation: The steady state theory had no way of explaining the source of CBR.Butthe big bang theory predicted it.
4.False
Explanation: The process by which protons smashtogether to form helium nuclei is known as fusion. As protonsfuse, a tiny amount of their matter is converted into alot of energy.
5.True
Explanation: In 1910, a Danish astronomer,Ejnar Hertzsprung, and an American astronomer, HenryRussell, found a way of distilling the rapidly accumulatinginformation about stars in a way that began to explaina lot about the life cycles of stars. They assembledinformation about many different stars into a simplegraph. On one axis they plotted the real brightness ofeach star; and on the other theyshowed its surface temperature. The graph they produced isknown as a Hertzprung–Russell (H–R) diagram.