Science Lottie. Flashcards
What’s an amplitude?
The maximum distance moved by a point on a vibrating wave measured.
What’s the crest?
The top of each wave.
What’s a trough?
The bottom of a wave.
What’s the wave length?
The distance between crests of each 2 waves.
What are the 2 different types of waves with “fra” in the name?
Diffraction and refraction.
what symbol does a diffraction wave make when it goes through a tight space?
A Wi-Fi symbol.
What’s the type of wave that acts as a mirror?
Reflection.
What is the incident wave?
An incident wave is a current wave that travels through a transmission line.
True or false, is a lower frequency a more spaced out wave?
True.
When you get older you start to lose a hearing of high pitch noises, why is that?
Because your eardrums get less flexible, making them stiffer, which then leads to them moving slower only hearing mid and low pitch noises.
What is a frequency?
The number of waves per second.
What do we measure waves in?
Hertz/ Hz
What does soluble mean?
That something can dissolve.
What does insoluble mean?
That something doesn’t dissolve.
What does solvent mean?
What something dissolves in.
How do we see colour?
The human eye and brain together translate light into colour. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of colour. Newton observed that colour is not inherent in objects. Rather, the surface of an object reflects some colours and absorbs all the others.
What are the primary colours in light?
Green, Blue and red.
What are the secondary colours in light?
Cyan, Magenta and yellow.
What is sound?
Sound is a type of energy made by vibrations. When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well.
What do ultrasounds do?
An ultrasound scan, sometimes called a sonogram, is a procedure that uses high-frequency sound waves to create an image of part of the inside of the body. An ultrasound scan can be used to monitor an unborn baby, diagnose a condition, or guide a surgeon during certain procedures.
What’s the difference between light and sound waves?
Light waves are electromagnetic waves while sound waves are mechanical waves. Light waves are transverse while sound waves are longitudinal. Light waves can travel in vacuum. Sound waves require a material medium to travel, and hence, cannot travel in vacuum.
What’s exothermic?
When energy goes out but temperature goes in.
What’s endothermic?
When energy goes in but the temperature goes out.
