Converting large unit to small unit (Multiply)
10 minutes = 600 seconds
2 years = 104 weeks
3 weeks = 21 days
5 fortnights = 70 days
3 decades = 30 years
Converting small unit to large unit (Divide)
30 minutes = 30 ÷ 60 = 0.5 hour
45 minutes = 45 ÷ 60 = 0.75 hour
12 hours = 12 ÷ 24 = 0.5 day
13 weeks = 13 ÷ 52 = 0.25 year
30 years = 30 ÷ 100 = 0.3 century
This first ever photograph was taken by Louis Daguerre, an artist and physicist, in Paris in 1838. Only 3 people can be seen in his photograph, but because Daguerre used Time Lapse Photography, there would have been many more people moving in and out of view over the 15 minutes that the photographic plate was exposed.
You can create your own time lapse photographs with an ordinary camera by lengthening the exposure time. Try to make a "ghost" photograph by asking a person to stay still in front of the camera for about five seconds and then slowly moving out of view.
Complete these time conversions.
Q1. 15 minutes = hour
Q2. 20 hours = minutes
Q3. 1 day = minutes
Q4. 72 hours = days
Q5. 3 fortnights = days
The Summer Solstice (Mid-summer) occurs on the day of the year with the most number of hours of daylight. In the northern hemisphere, this occurs on June 20th or 21st. In the southern hemisphere, this happens on December 21st or 22nd. Similarly, the Winter Solstice (Mid-winter) has the least number of hours of daylight. In the northern and southern hemispheres respectively, this occurs on December 21st or 22nd and June 20th or 21st.
An Equinox has equal number of hours of daylight and dark. The northern hemisphere's Spring Equinox is March 20th or 21st. The southern hemisphere's Spring Equinox is September 22nd or 23rd. The Autumnal (Fall) Equinox is September 22nd or 23rd in the northern hemisphere and March 20th or 21st in the southern hemisphere.