Resistors are small electronic parts that resist the flow of electrical current. Resistors have many uses, and you can find them in many Science Buddies electronics projects. A resistor's amount of opposition to the flow of current is called its resistance. Resistance is measured in ohms, abbreviated Ω (the capital Greek letter Omega). Resistance may have a metric prefix, for example kilo-ohms (kΩ). One kilo-ohm is equal to 1,000 ohms.

The resistance value is indicated by color-coded bands on the resistor. You can identify the resistance of a four-band resistor using the following table. The first two bands are the base resistance value, the third band is a power of 10 multiplier, and the fourth band (which is spaced farther away from the other three bands) is the tolerance.

So, for example red, red, brown, gold indicates 22×10¹ ± 5% = 220Ω ± 11Ω. Brown, black, orange, gold indicates 10×10³ ± 5% = 10kΩ ± 500Ω:

Using the table above, can you identify the resistances of the resistors in this picture?