Communication and Waves

Why are there so many radio stations in the US?

• Can transmit lots of data.

• No loss of information during transmission.

• Signals and data are easily transmitted and transformed by radio stations.

• Radio stations can transmit signals clearly even in bad weather.

Tags

NGSS.HS-PS4-5

Which statements are true regarding cell phone use of radio signals?

• Cell phones transfer and receive radio signals without a medium.

• Radio signals transferred through cell phones carry large amounts of data.

• Cell phones transfer information without using a transmitter and a receiver.

• The data transferred through cell phones using radio signals can be stored and recorded.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which statement supports the claim that wireless computer networks are more beneficial than signals by other devices?

• Humans can sense wireless signals directly.

• Signals do not need to be digitized.

• Wireless signals can carry large amounts of data at high radio frequencies.

• Signals are transmitted at lower radio frequencies to reduce loss of data.

Tags

NGSS.MS-PS4-3

What is true about TV's since 2009?

• TVs work best using internet connections.

• TV's must be connected only by satellite.

• TV's use digital signals with better transmission qualities.

• TV's have been modernized due to the development of analog signals.

Tags

NGSS.MS-PS4-3

A signal is sent from a telephone in a control tower to an airplane in flight. What is one way the signal is communicated?

• Infrared waves

• UV waves

• Radio Waves

• Gamma Waves

Tags

NGSS.MS-PS4-2

Why is digitization the best method for the transmission of information?

• it can be stored for future recovery.

• The signals generate usable energy.

• The signals require a medium unlike UV waves.

• The information can be sent over long distances with zero percentage loss.

Tags

NGSS.MS-PS4-3

Which features of digital communication are correct?

• Digital signals carry less information per second.

• Information can be stored for future recovery.

• Digital signals can be transmitted over long distances.

• Signal loss happens less frequently.

Tags

NGSS.MS-PS4-3

Radio signals that are detected by wirelewss computer networks are not detected by radios and TV's. Why?

• They are easily reflected by atmospherec layers.

• The waves carry very little information.

• The waves have lower frequencies that radios and TV's can detect.

• The waves have higher frequencies that radios and TV's can detect.

Radios, televisions, cell phones, and wireless computer networks are examples of technologies that benefit humans. How are they beneficial?

• They transmit and receive signals with zero percentage loss.

• They use signals that do not require mediums to travel.

• They relay information without direct human interaction

• They use low-energy radio signals.

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-3

Which is incorrect about cell phone technology.

• Cell phones use radio signals.

• Cell phones send and receive signals without mediums.

• Cell phones transfer information with transmitters and receivers.

• Cell phones transfer large amounts of data that cannot be stored.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS4-1