b. Which image, 1, 2, 3 or 4, shows the Moon during a waxing crescent phase? Image 1 Image 2 Image 3 Image 4
c. Approximately how long is the lunar cycle? 1 day 1 week 1 month 1 year
d. Explain why the Moon is visible from Earth.
3. Sample Paper 2018, Question 13 Solar eclipses can happen a few times each year.
a. The diagram below shows a simple model of a solar eclipse (an eclipse of the Sun). In the diagram, write the letter X for Earth, Y for Moon and Z for Sun.
:Fig. 36.23
b. Two weeks before or after a solar eclipse sometimes there is a lunar eclipse (an eclipse of the Moon). Draw a labelled diagram to show a model of a lunar eclipse.
A solar eclipse in March 2015 affected the solar electrical power produced in the German electricity grid. The graph below shows the solar electrical power produced from Monday to Friday during the week of the solar eclipse.
25 20 15 10
5 0 Monday Tuesday Wednesday Thursday :Fig. 36.24
c. On which day of the week did the solar eclipse occur? Justify your answer. d. Which was the brightest day of the week? Justify your answer.