1.
This circuit uses a 9-volt _______________ .
2.
This circuit uses _________________ fixed resistors.
3.
The purpose of this circuit is to _______________ moisture.
4.
The LED _____________ when there is moisture in the soil.
5.
The 555 integrated circuit has _______________ pins.
6.
Pin _____________ in the output of the 555 integrated circuit.
7.
How many probes are in this circuit to sense moisture?
8.
The _________________ of the clock pulses depends on how much moisture is in the soil being tested.
9.
If the soil is low on ________________ the LED may remain ON or it may remain OFF.
10.
What is the color of the first band on the 222 Ohm fixed resistor?
