Waves, Energy and Communication

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.

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.

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.HS-PS4-5

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-PS4-3

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.

Tags

NGSS.HS-PS4-5

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-PS4-3

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-PS4-1