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1. Which two elements are present in the star? A. lithium and helium B. lithium and sodium C. hydrogen and helium D. hydrogen and sodium 2. Stars begin their life cycle as A. a black hole B. a nova C. a nebula D. a supernova C. It is a nebula star and is located in a disc-shaped galaxy of stars. B. It is a medium-size star and is located in a disc-shaped galaxy of stars. A. It is a yellow dwarf and is located in a undefined shape galaxy. D. It is a Supernova star and is located in an undefined shaped galaxy of stars? 3. Which of the following statements about the Sun is true? 4. As two objects move farther apart in space the gravitational pull between them A. gets weaker B. gets stronger C. stays the same D. is not predictable C. It produces electromagnetic waves with longer wavelengths than visible light. D. It produces electromagnetic waves with higher frequencies than visible light. B. It produces vibrating electrons in addition to electromagnetic waves. A. It produces sounds in addition to electromagnetic waves. 5. It is possible to observe a red giant using a radio telescope. What does this illustrate about a red giant? 6. Compared to other stars in the universe, the Sun is A. the largest star B. much farther away than any other star D. much closer than any other star C. the smallest star C. Spiral galaxies have almost no gas or dust. B. Elliptical galaxies vary more in shape than spiral. A. Elliptical galaxies have almost no gas and dust. D. Spiral galaxies contain only old stars. 7. How are elliptical galaxies and spiral galaxies different? A. Scientists use miles because it is the unit we use in the US.
C. Scientists use the speed of sound because sound waves travel so fast in space. D. Scientists use kilometers because it is a common unit used by most countries. B. Scientist use light years because the distance across our galaxy is so far. 8. Which of the following best describes how scientists measure the distance across our galaxy? 9. The light from a star that reaches Earth is as old as B. the light coming in from the Sun A. the number of light years the star is from Earth C. the age of Earth D. the age of the universe 10. According to the HR diagram how would the star be classified? A. Main Sequence B. White Dwarf C. Red Giant D. Supergiant |