Course 2 Topic 10 Information Technologies

With the large number of devices communicating wirelessly these days, how are the signals kept from going to the wrong place?

• Each device has an internal code that has to match the code of an incoming transmission.

• Different devices operate on different wavelengths of the electromagnetic spectrum.

• The signals are routed through the wireless network like a post office sorts mail by zip code.

• Devices with larger antennae use higher frequencies and devices with smaller antennae use lower frequencies to communicate.

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NGSS.MS-PS2-3

NGSS.MS-PS4-1

Which type of signal would be more difficult to erase the noise from?

• Analog, because it is a continuous signal and the noise is blended in.

• Digital, because it is a continuous signal and the noise is blended in.

• Both, because analog and digital signals are both continuous and the noise is blended in.

• This is all so confusing!!

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NGSS.MS-PS4-3

Morse code is an example of which type of signal?

• analog

• digital

• noise

• QED

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NGSS.MS-PS4-3

What does the bandwidth describe?

• The amount of information that can be transmitted.

• The location of the signal on the electromagnetic spectrum.

• The amount of noise interference.

• The width of the wire used to send electronic signals.

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NGSS.HS-PS4-5

An electric circuit in which all of the parts are connected one after another along one path.

• Parallel circuit

• Series Circuit

• Ohm's Law

• Encryption

Resistance in a circuit is equal to voltage divided by current.

• Parallel circuit

• Series Circuit

• Ohm's Law

• Sampling Rate

A complete, unbroken path through which electric charges can flow.

• resistance

• electrical circuit

• voltage

• wave pulse

The measurement of how difficult it is for charges to flow through an object.

• voltage

• wave pulse

• resistance

• Hertz

The difference in electrical potential energy per charge between two places in a circuit.

• resistance

• wave pulse

• voltage

• pixels

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NGSS.MS-PS3-2

A surge of energy that travels through an electric circuit when it is closed.

• wave pulse

• electronic signal

• electromagnetic signal

• digital signal

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NGSS.MS-PS2-3