Question

1. what type of rock is obsidian? (a) sedimentary (b) igneous (c) metamorphic (d) sandstone 16. during a lunar eclipse (a) the moon lies between the earth and sun (b) the sun lies between the moon and earth (c) the earth lies between the moon and sun (d) the sun lies outside the moon’s umbra 17. a centimeter is (a) one hundredth of a meter (b) one tenth of a meter (c) ten meters (d) one hundred meters

Explanation:

1. Obsidian is formed from the rapid cooling of lava, which classifies it as an igneous rock. Sedimentary rocks form from the accumulation of sediments, metamorphic rocks from the transformation of existing rock types under high - pressure and high - temperature conditions, and sandstone is a type of sedimentary rock.
2. During a lunar eclipse, the Earth lies between the Moon and the Sun. The Earth blocks the sunlight from reaching the Moon, casting a shadow on it.
3. The metric prefix "centi -" means one hundredth. So a centimeter is one hundredth of a meter.

Answer:

1. B. igneous
2. C. the Earth lies between the Moon and Sun
3. A. one hundredth of a meter