作者:steve kirkpatrick 15 年以前
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Cotton
Rubber
Silk
Leather
Wood
Oil
Diamond
Slate
Coal
Seed Dispersal
Animal
Wind
Pollenation
Germination
Roots - Absorb water and dissolved nutrients
Stem - Transport
Leaves - Make Energy
Flower - Reproduction
Factors effecting Plant growth
Plant in cupboard
Nutrition
Heat / Cold
Germination (growth of seed)
Warmth
Water
Think of a big bear with a deep growl
If the string on an instrument is looser it will have a lower pitch of note
Think of a small dog with a squeaky bark
The tighter the string on an instrument the highter the pitch of note
Its measure in decibals
The vibration is then picked up by our brain.
Sound cannot travel through a vacuum
Sounds can travel through brick, glass and even WATER!
We don't always see the vibration
Sound has to travel through something
Shadow stick
Long in evening
Short at midday
Long in morning
pm afternoon / evening
am morning
Causes the tides (moon's gravity)
Reflected light
Satellite
Phases of the Moon
28 Days in a Lunar Month
365 Days ( a year)
The axis is tilted
Summer
Spring
Autumn
Winter
This causes the Seasons
Day and Night
Dawn
Dusk
Noon / Midday
Sunset (West)
Sunrise (East)
24 Hours