AS101 - Quizzes and Assignments Questions and Answers 100% Pas

AS101 - Quizzes and Assignments Questions and Answers 100% Pass How many centimetres are there in one kilometre? - 100,000 What is one thousandth of one metre? - 1000000 One number has three significant figures and another number has four significant figures. If these numbers are added, subtracted, multiplied, or divided, which operation can produce the greatest number of significant figures? - the addition TRUE OR FALSE: Any location on the Moon is sunlit for three weeks and is in darkness for one week as the Moon rotates. - False TRUE OR FALSE: As the illuminated part of the Moon grows larger from new to full, it is said to "wane". - False TRUE OR FALSE? When the Moon is totally eclipsed, the Moon is illuminated by some sunlight reflected by Earth's atmosphere. - False TRUE OR FALSE: A "larger" Moon on the horizon is an optical illusion. - True TRUE OR FALSE: There is one side of the Moon that can never be seen directly by observers on Earth. - True 2 | P a g e Author: Katelyn Whitman. ©2025, All Rights Reserved. When did the first recorded female astronomer make her detailed observations of the motion of planets? - more than 4000 years ago In 1054 CE, the Chinese recorded a very interesting and powerful cosmic event. What was this event? - a supernova What was a common feature of astronomy as practiced worldwide prior to the Greeks? - recognizing patterns Who were the two great authorities of Greek astronomy? - Aristotle and Ptolemy What did Eratosthenes measure very accurately? - the size of the Earth TRUE OR FALSE: A supercluster refers to a large group of stars within the Milky Way. - False TRUE OR FALSE: The average distance from Earth to the Sun is 1 AU. - True TRUE OR FALSE: The metric system is a decimal system. - True TRUE OR FALSE: The nearest star is 1 ly from the Solar System. - False TRUE OR FALSE: The Sun is located at the centre of the Milky Way. - False What is 1. 95 billion the same as? - 1. 95 × 10^9 What is the name of the hazy band of light that circles our sky, produced by the glow of our galaxy? - the Milky Way 3 | P a g e Author: Katelyn Whitman. ©2025, All Rights Reserved. Which statement best describes the Milky Way Galaxy? - It is a spiral galaxy. What is 5. 7×107 the same as? - 57 million Which of the following has the distances arranged in order from smallest to largest? - millimetre, kilometre, Astronomical Unit, light year What is the average distance from Earth to the Sun? - 1 AU Assume the size of the Sun is represented by a baseball (diameter about 7 cm). At this scale, the Earth is about 15 metres (150 million km or 8 light-minutes) away. How far away, to scale, would the nearest stars to the Sun be? Pick the closest answer. - about the distance across Canada from Toronto to Vancouver (about 4300 km) Which of the following is the smallest? - size of a typical planet What does the Solar System contain? - the Sun, its planets, and some smaller bodies Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)? - 100 times What is the approximate diameter of the Earth? - 13,000 kilometres How is a planet different from a star? - Planets reflect light, while stars produce their own light. Which of the following has the distances arranged in order from largest to smallest? - light year, Astronomical Unit, kilometre, millimetre 4 | P a g e Author: Katelyn Whitman. ©2025, All Rights Reserved. Earth has a radius of about 6400 km, the Sun has a radius of about 7. 0×105 km, and a rubber ball has a radius of 6. 4 cm. If you were to construct a scale model of the Solar System using the rubber ball to represent Earth, what is the radius of a ball needed to represent the Sun in your model? - 700 cm Which statement best describes the Milky Way Galaxy? - It contains about 100 billion stars. If light takes 8 minutes to travel from the Sun to Earth, and over 4 hours to travel from the Sun to the planet Neptune, what is the distance from the Sun to Neptune? - 30 AU If we say that an object is 1,000 light-years away, how does that affect how we see it? - We see it as it looked 1,000 years ago. How does one light-year relate to Astronomical Units, roughly? - 63,000 AU Which statement best describes the study of astronomy in ancient times? - Civilizations around the world used astronomy to help understand their place in the universe. How many centimetres are there in one kilometre? - 100,000