How a Seed Grows
This part of a seed absorbs water and swells, starting the growth process.
The seed coat
These early sources of light were dangerous because they could cause fires and gave off smoke.
candles and oil lamps
This environmental factor pulls the root downward through a process called gravitropism.
Gravity
Edison experimented with different materials to find one that had high resistance and wouldn’t burn out quickly. This part is called the what?
The filament
Why is water important in the process?
Water helps the seed swell and break open
In addition to inventing the lightbulb, Edison also created this system to distribute electricity to homes.
an electric power grid
If a seed doesn't get enough of this, photosynthesis can't occur, and the plant won't grow properly.
Sunlight
What happened after the lightbulb was invented?
People began using electric light in homes and businesses
List the steps of how a seed grows in order.
Seed planted → seed swells → root grows → shoot grows → leaves grow → flowers/fruit
What problem did Edison want to solve and what steps did he take to solve it?
People needed safer light than candles/oil.
Edison tested materials until he found one that worked