Grade 10 Science Examination

Which of the following are not used in communication?

• microwave

• radio waves

• gamma rays

• infrared rays

Which of the following refers to the conversion of electrical signals to radio waves?

• antenna

• reception

• transmission

• amplitude modulation

Which of the following refers to the conversion of radio waves to electrical signals?

• antenna

• reception

• transmission

• amplitude modulation

Which of the following is used in GPS?

• visible light

• microwaves

• gamma rays

• ultraviolet rays

Which of the following is used to see things in the dark?

• radio waves

• visible light

• gamma rays

• infrared radiation

Which of the following can be used to cut through materials such as metals?

• lasers

• UV rays

• radio waves

• microwaves

Which phenomenon involves the absorption of UV radiation and emission of visible light?

• fluorescence

• luminescence

• bioluminescence

• chemiluminescence

Which of the following is used in short-distance communication?

• x-rays

• infrared rays

• radio waves

• gamma rays

Which of the following is used to transmit or receive radio signals?

• laser

• x-rays

• WLAN

• antenna

Which of the following is used to broadcast news?

• reception

• transmission

• amplitude modulation

• frequency modulation