Starter I would be very grateful if you could complete the questionnaire on your desk. This is for a project I am completing with the University of Southampton. Put your initials on the top. Your names will not be shared with the university. 5 minutes

Key words: orbit, axis, spin, season, sun, moon, eclipse, lunar, solar Learning objectives – we will be successful when we can: relate the Earth’s movement to seasons relate size and position of the moon and the sun to how we observe them understand the difference between a solar and lunar eclipse

Quiz Complete work on seasons LO: relate earth’s movement to seasons Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz Find out what a lunar and solar eclipse are

Quiz Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz LO: relate size and position of the moon and the sun to how we observe them Find out what a lunar and solar eclipse are

Quiz Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz Find out what a lunar and solar eclipse are LO: understand the difference between a solar and lunar eclipse

Quiz Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz Find out what a lunar and solar eclipse are

Quiz Complete work on seasons LO: relate earth’s movement to seasons Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz Find out what a lunar and solar eclipse are

How do we get different seasons? The Earth is divided into two hemispheres, separated by the equator. northern hemisphere equator southern hemisphere Why do the hemispheres have different seasons at different times of the year? https://www.youtube.com/watch?v=KUU7IyfR34o

Seasons Use your text book (p168) to help you explain each part of the picture. Why is it summer in the UK in June, why are the days longer? Turn your book sideways and stick the picture in the centre of the page. 15 minutes

Quiz Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz LO: relate size and position of the moon and the sun to how we observe them Find out what a lunar and solar eclipse are

Solar System Data Questions Diameters Sun = 1392 000 km Moon = 3474 km Distance away from Earth Sun = 150 000 000 km Moon = 385 000 km Questions How many times larger is the Sun’s diameter compared with the Moon’s diameter? How many times further away from the Earth is the Sun compared with the Moon? What can we say about the sizes of the Sun and Moon in the sky? 5 minutes

Quiz Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz Find out what a lunar and solar eclipse are LO: understand the difference between a solar and lunar eclipse

Light Intensity / arbitrary units What does this graph show? Light Intensity / arbitrary units Time / min

Eclipses

Solar eclipse Taken with a camera filter NEVER look directly at the Sun, even to observe an eclipse. Use a pin-hole camera instead!

Secondly However… The Moon’s orbit is not perfectly circular but an ellipse. This is like a slightly flattened circle.

Why don’t eclipses occur all the time? The Moon does not orbit around the Earth’s equator but at an angle. This makes it uncommon for the Moon-Earth-Sun to line up perfectly for an eclipse.  The moons elliptic orbit means that the umbra often doesn’t fall on the Earth’s surface and therefore eclipses don’t happen. Partial eclipses are still very common though

Upcoming Solar eclipses The last solar eclipse seen here in the UK was on 20th March 2015 80% of the sun was covered 23rd September 2090 – total eclipse for much of England and Wales How old will you be when this occurs? https://www.youtube.com/watch?v=iG9GdfL_ToU

Lunar Eclipse Much more common, but a bit less spectacular ! https://www.youtube.com/watch?v=vKAw_wrIr5s

Activity Stick the picture of the solar and lunar eclipse in your book. Around the picture explain in your own words, what is happening. 10 minutes

Questions The sun is a lot bigger than the moon but it appears to be the same size. Why? What causes the solar eclipse? What do people see when they are in an area covered by a partial eclipse? Why don’t eclipses happen every month? What happens in the lunar eclipse? Why isn’t the moon completely blocked out in a lunar eclipse?

Quiz Complete work on seasons Look at the relative sizes and distances of the sun and moon Quiz Find out what a lunar and solar eclipse are