months
27,
31
Moon
19,
26,
27,
28,
30
odometers
12
pendulum
clocks
35
quartz
clocks
36
radar
guns
15
Romans
27,
29,
30
scales
23,
39,
48
shadow
sticks
32
solar
calendars
29
speed
of
sound
13
speed
13,
15,
16,
44,
45,
46,
49
speedometers
3,
49
stick
scales
22
storm
glass
41
sundial
32
temperature
37–39
thermometers
38–39
thunder
glass
41
time
25–36
tornadoes
47
units
of
measure
5,
6,
9
water
clocks
33
weather
37–49
weighbridge
23
weight
17–24
wind
socks
43
wind
vanes
43
wind
37,
43–47