Review test - Year 9

Read the statements below and choose the alternative that matches the sequence in the list.

-> Physical substance in the universe.

-> A substance that something grows in lives in or moves through.

-> The pattern in which some types of energy, such as sound, light, and heat, are spread or carried.

-> A range of similar things; a range of waves such as light waves or radio waves.

• Matter, Medium, Wave, Spectrum.

• Spectrum, Medium, Wave, Matter.

• Medium, Spectrum, Wave, Matter.

• Wave, Spectrum, Medium, Matter.

Which of the following is NOT an example of electromagnetic energy?

• Eating dinner

• Using a microwave

• Using a cell phone

• Getting an x-ray

What is the difference between sound waves and radio waves?

• Sound waves are mechanical waves. Radio waves are electromagnetic waves. Electromagnetic waves do not require a medium to propagate.

• Sound waves are electromagnetic waves. Radio waves are mechanical waves. Electromagnetic waves do not require a medium to propagate.

• Sound waves are microwaves. Radio waves are electromagnetic waves. Electromagnetic waves do not require a medium to propagate.

• Sound waves are mechanical waves. Radio waves are microwaves. Microwaves do not require a medium to propagate.

The human eye is only capable of seeing which electromagnetic wave?

• Infrared Light

• Ultraviolet Light

• Visible Light

• All of the above

About Electromagnetic waves choose the alternative that matches

•  Microwaves only travel in a single direction; this is why microwave ovens have a spinning plate.

•  Radars use microwaves to detect objects.

•  Microwaves are only used in microwave ovens.

•  Microwave weapons are efficient because they don’t depend on weather conditions or visibility inhibitors.

What is Morse code?

• Is a way to encode text messages on a letter-by-letter basis very simply. The message is transmitted using a series of tap sounds, hence its name.

• Is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dashes.

• Morse code represents text, computer processor instructions, or any other data using a two-symbol system. The two-symbol system used is often "0" and "1" from the binary number system.

• Is a Spelling Alphabet, a set of words used instead of letters in oral communication (i.e. over the phone or military radio).

What are the uses of infrared radiation?

• To share content faster than Bluetooth.

• To see invisible light and detect light portions in the electromagnetic spectrum.

• Diagnose different disorders and diseases, and to scan passengers in the airport.

• Detect hot objects and their vibrations.

What objects are used to see infrared waves?

• Eyes

• Regular cameras

• Night vision goggles

• Satellites.

What is a style of clothing that is popular at a particular time (not necessarily long or short)?

• a)    Style

• Monochromatic

• Analogous.

• Fashion.

What is a style of clothing that is popular at a particular time (not necessarily long or short)?

• a)    Style

• Monochromatic

• Analogous.

• Fashion.