NOVA Science and Technology Book - 7 301iii. Waxing crescent iv. Gibbous c. When does a solar eclipse occur usually? i. New moon ii. Full moon iii. Waxing crescent iv. Gibbous d. What is a dark shadow called? i. Penumbra ii. Shade iii. Umbra iv. Dark e. What is a faint shadow called?i. Penumbra ii. Shade iii. Umbra iv. Dark 4. Match the following Faint shadow moon gets darker Dark shadow umbra Shadow sun is blocked Solar eclipse dark patch when light is blocked Lunar eclipse penumbra STEP 25. Answer the following questions in one word. a. What is it called when the shadow of one heavenly object falls on another? b. How long do solar eclipses last? c. What blocks light during the solar eclipse? d. What blocks light during a lunar eclipse? e. What is it called when only a portion of the sun is blocked?
302 NOVA Science and Technology Book - 76. Differentiate between the following. a. Umbra and penumbra b. Partial solar eclipse and total solar eclipse c. Solar eclipse and lunar eclipse 7. Give reason a. A solar eclipse occurs only at the new moon. b. A lunar eclipse occurs only at full moon. c. A total solar eclipse is important to scientists. d. Moon is reddish brown during a total lunar eclipse. e. Lunar eclipse lasts longer than the solar eclipse. 8. Write one main characteristic of the given diagram.a b STEP 39. Answer the following questions. a. What is a shadow? b. What is an eclipse? How does it occur? c. What is a lunar eclipse? d. What are the causes of the lunar eclipse? e. What are the causes of the solar eclipse? 10. Draw a diagram of the lunar eclipse.