Grade 10 Science - Pretest #7(2Q)

1. They are waves that are created as a result of vibrations between an electric field and a magnetic field.

• A. Secondary waves

• B. Primary waves

• C. electromagnetic waves

• D. Surface waves

2. It is the range of all types of Electromagnetic(EM) radiation.

• A. electromagnetic radiation

• B. electromagnetic wave

• C. electromagnetic spectrum

• D. electromagnetic ray

2. The frequency of a wave that has a longer wavelength, using, requiring, or involving a radio-frequency band or a frequency lying between 300 and 30 kilohertz.

• A. low frequency wave

• B. high frequency wave

• C. medium frequency wave

• D. short wavelength frequency

3. It is an electronic circuit that is mainly used to recover the information content from the modulated carrier wave..

• A. phase Modulation

• B. demodulator

• C. amplitude modulation

• D. frequency modulation

5. It is the process by which an object is exposed to radiation.

• A. darken

• B. irrigation

• C. mitigation

• D. irradiation

6. It is an electromagnetic radiation of the shortest wavelength and highest energy.

• A. gamma ray

• B. x-ray

• C. UV ray

• D. cosmic ray

7. It has some benefits for people, including the creation of Vitamin D, it also can cause health risks.

• A. gamma ray

• B. x-ray

• C. UV ray

• D. cosmic ray

8. It is the process of converting data into radio waves by adding information to an electronic or optical carrier signal.

• A. modulation

• B. irridiation

• C. demodulator

• D. calculator

9. It is the transmission by radio of writing, signs, signals, pictures, and sounds of all kinds, including all instrumentalities, facilities, apparatus, and services (among other things, the receipt, forwarding, and delivery of communications) incidental to such transmission.

• A. modulation

• B. irridiation

• C. radio communication

• D. calculator

10. It is the component of an electromagnetic wave (especially a radio wave) that travels directly from transmitter to receiver without being reflected.

• A. solid wave

• B. ground wave

• C. space wave

• D. sky wave