Energy Transfer and Transformations
This type of energy transfer occurs when heat moves from a warmer object to a cooler one, via physical contact.
Conduction
What is the term that describes the number of vibrations per second in a sound wave.
Frequency
What is approximately 299,792 kilometers per second?
The speed of light
The part of the eye that controls the amount of light entering.
The pupil
What is the name of the phenomenon of objects that break the sound barrier?
Sonic Boom
This law states that energy cannot be created or destroyed, only transformed?
The Law of Conservation of Energy
What determines the loudness of a sound wave?
Amplitude
This phenomenon occurs when light bends as it passes from one medium to another.
Refraction
What is the name of the nerve that connects your ears to your brain?
Between men and women which is more likely to have colour blindness?
Men, 8% of men have colour blindness whereas only 0.5% of women are colour blind. Colour blindness is often linked to the X chromosome, of which men only have one.
Which 3 types of energy are present in a battery powered remote control car?
Chemical, Electrical, Kinetic (Movement energy)
What type of wave is a sound wave?
Longitudinal Wave
What type of wave is a light wave?
Transverse wave
The light-sensitive layer at the back of the eye.
The retina
What is the maximum distance for which sonar can be used underwater?
2400 meters, or 2.4km
How does heat travel through space? Provide the name of the heat transfer and brief description of the process.
Radiation, is the release of electromagnetic energy.
Unlike conduction or convection, radiation requires no medium for heat transfer. So, radiation occurs both within a medium (solid, liquid, gas) or through a vacuum.
This effect describes the change in frequency or wavelength of a sound wave in relation to an observer moving relative to the source of the sound.
The Doppler Effect
What is the range of wavelengths of light that are visible to the human eye?
Visible Spectrum
What are the names of the three tiny bones in the ear?
Hammer, Anvil & Stirrup
What is the rarest eye colour in humans?
Green for the most common colours. However, for 1 in 50,000 people Occular Albinism whereby the iris is has low to no melanin resulting in no colour or faint colour in the iris.
The process by which plants convert sunlight into chemical energy is called?
Photosynthesis
What is the name to describe the trough, or lack of the section of a sound wave where particles are most spread out?
Rarefaction
If a light beam reflects of an object the angle it makes with the normal as it hits the object is called?
The angle of incidence
Does purple light exist? Provide an explanation for the answer.
No. The brain perceives these light waves as several colours but no distinct colour. As a result, the brain does the best approximation of what it sees and as a result we see purple, but not purple light.
4.5 to 5.7L. After losing about 40% of your blood will leave an individual in a fatal condition. That's about 2L of blood depending on the indicidual.