GBC Year 9 Science Transfer of Energy

Which terms are used for the number of waves produced every second and the height of the wave?

Image: User: Superborsuk, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons

• wavelength and amplitude
• amplitude and frequency
• frequency and amplitude
• amplitude and wavelength

Select the right option to complete the sentence. The visible spectrum:

• is part of the electromagnetic spectrum.
• consists of red, orange, yellow, green, blue, indigo and violet coloured light.
• has longer wavelengths than ultraviolet (UV) light.
• ia all of the above.

Select the correct words to complete this sentence: Radio waves have a ____ frequency and a ____ wavelength.

• low, long
• high, long
• high, short
• low, short

If you stood beside a bonfire what form of electromagnetic radiation would you feel?

• infrared
• gamma rays
• radio waves
• microwaves

Infrared cameras can detect heat infrared radiation (heat) given off by objects. Knowing this, which option would be a possible application for infrared cameras:

• Measuring the speed of moving objects, like cars.
• Looking for people lost in the bush at night.
• Sending messages through space.
• Detecting minerals in rocks.

Select the option that is not true in relation to X-rays and gamma rays.

• X-rays have a longer wavelength than gamma rays.
• X-rays and gamma rays are both produced during nuclear fission.
• Gamma rays are produced when the nucleus of an atom breaks down but X-rays are made by firing electrons into a piece of metal.
• Gamma rays are more ionising than X-rays.

Thermal energy is defined as:

Image: A. Greg (Greg L at English Wikipedia),

Public domain, via Wikimedia Commons

• Minimum kinetic energy of the particles making up a material.
• Average kinetic energy of the particles making up a material.
• Total kinetic energy of the particles making up a material.
• Maximum kinetic energy of the particles making up a material.

What is the name given to the section of a sound wave where the particles have high pressure?

Image: Pluke, CC0, via Wikimedia Commons

• vibration
• rarefaction
• compression
• frequency

What features of sound waves is pitch dependent upon?

• amplitude and frequency
• frequency and wavelength
• rarefactions and frequency
• compressions and amplitude

What is the central coloured part of the eye, and the small hole in the centre known as?

• iris and fovea
• cornea and pupil
• cornea and fovea
• iris and pupil