SCIENCE CLASSWORK: Earth Time and the Reason for Seasons
Name: _________________________
_
Part A. Activity
1. With your partner, shine your flashlight straight down
at the grid on the right. Trace the edges of the circle of
light that the flashlight makes.
How many squares are covered? _________
2. Now, shine your flashlight at an angle at the grid
below. Trace the outline. How many squares are
covered this time? ____________
3. When you change the angle of the flashlight, does the
amount of light coming out of it change? ______
4. How does the light per square change? (When you put
the flashlight at an angle, does each square get more
or less of the total light coming from the flashlight?)
Part B. Partner Practice: Determine whether it is colder in January or July in each of the following places (circle).
A. Canada:
January
July
F. Ireland:
January
July
B. Argentina:
January
July
G. Greenland:
January
July
C. South Africa:
January
July
H. Namibia:
January
July
D. Russia:
January
July
I.
Chile:
January
July
E. New Zealand: January
July
J.
Ecuador:
January
July
January
January
July
July
(tricky!)
Where is this place? __________________________
Which picture shows it tilted away from the Sun?
___________________________________________
How do you know? ___________________________
____________________________________________
____________________________________________
____________________________________________
____________________________________________
Where is this place? __________________________
Which picture shows it tilted away from the Sun?
___________________________________________
How do you know? ___________________________
____________________________________________
____________________________________________
____________________________________________
____________________________________________
1. What’s the difference between Earth’s revolution and its rotation?
2. How long does it take the Earth to make one revolution? ____________________
3. How long does it take the Earth to make one rotation? ____________________
4. Why don’t we measure a month as the amount of time the Moon takes to travel around Earth?
Part C. Independent practice
5. How many rotations occur in one of Earth’s revolutions? __________
6. Convert each of the following into Earth time:
A. One revolution of Earth + one rotation of Earth = _____ years _____ days _____ hours
B. Two revolutions of Earth + 3.5 rotations of Earth = _____ years _____ days _____ hours
C. 3.5 revolutions of Earth + 1.5 rotations of Earth = _____ years _____ days _____ hours
D. 380.25 rotations of Earth = _____ years _____ days _____ hours
E. 1462 rotations of Earth = _____ years _____ days _____ hours
1. Where is this place located (Northern Hemisphere, Southern
Hemisphere, Equator, or Poles)? __________________
How do you know?
Location A
2. At what (if any) time of year is the part of Earth where this place is
tilted away from the Sun? ___________________
How do you know?
Month
Annual Weather in Location B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °C (°F)
28
(82)
28
(82)
27
(81)
26
(79)
25
(77)
25
25
(77) (77)
25
(77)
27
27
(81) (81)
27
(81)
27
(81)
26
(79)
Average low °C (°F)
18
(64)
18
(64)
18
(64)
18
(64)
17
(63)
17
17
(63) (63)
16
(61)
17
17
(63) (63)
17
(63)
17
(63)
17
(63)
3. Where is this place located (Northern Hemisphere, Southern Hemisphere, Equator, or Poles)? __________________
How do you know?
4. At what (if any) time of year is the part of Earth where this place is tilted away from the Sun? __________________
How do you know?