PRINCIPLES AND APPLICATION OF APPLIED SCIENCE UNIT 1 WITH CORRECT ANSWERS

PRINCIPLES AND APPLICATION OF APPLIED SCIENCE UNIT
1 WITH CORRECT ANSWERS.

6 - CORRECT ANSWER -How many electrons can a p subshell hold?



10 - CORRECT ANSWER -How many electrons can a d subshell hold?



s - CORRECT ANSWER -Which subshells are available in the first energy level?



s and p - CORRECT ANSWER -Which subshells are available in the second energy level?



s, p and d - CORRECT ANSWER -Which subshells are available in the third energy level?



Orbitals must all be singly filled before they can be doubly occupied - CORRECT ANSWER -What
is Hund's rule?



Copper and chromium - CORRECT ANSWER -Which elements do not fill the 4s subshell before
the 3d subshell?



The electrostatic attraction between oppositely charged ions - CORRECT ANSWER -Define the
term ionic bond



+1 - CORRECT ANSWER -What is the charge of an ion from group 1?



+2 - CORRECT ANSWER -What is the charge of an ion from group 2?

,-2 - CORRECT ANSWER -What is the charge of an ion from group 6?



-1 - CORRECT ANSWER -What is the charge of an ion from group 7?



Na loses its 2s1 electron gaining a +ve charge.

Cl gains an electron in the 3p subshell gaining a -ve charge.

The opposite charges attract to form NaCl - CORRECT ANSWER -Explain how atoms of sodium
react with atoms of chlorine



When the impulse jumps between nodes increasing the speed at which the impulse travels
down the axon - CORRECT ANSWER -What is meant by the term saltatory conduction?



Calcium voltage gate - CORRECT ANSWER -Which voltage gate opens in the synaptic bulb as the
action potential reaches it?



Ca2+ floods in, stimulating the vesicles to move to the membrane of the presynaptic bulb -
CORRECT ANSWER -What happens in the synaptic bulb as the calcium voltage gates open?



Acetylcholine (a neurotransmitter) - CORRECT ANSWER -Which chemical is held in the vesicles?



The release of the acetylcholine into the synaptic cleft. This then diffuses across the synapse. -
CORRECT ANSWER -Define the term exocytosis



Acetylcholine bonding to receptors on sodium voltage gate. - CORRECT ANSWER -What causes
the sodium channel to open on the postsynaptic neurone?

,Broken down by acetylcholinesterase into ethanoic acid and choline. This is then reabsorbed by
the presynaptic neurone and reformed into acetylcholine. - CORRECT ANSWER -What happens
to the acetylcholine after the sodium channel opens?



Electroenchephalogram - CORRECT ANSWER -What does EEG stand for?



A regularly repeating motion about central value - CORRECT ANSWER -Define Oscillation



The number of whole cycles occurring in one second - CORRECT ANSWER -What is frequency?



f = 1/T - CORRECT ANSWER -What is the formula for frequency?



The time taken for one whole cycle of an oscillation. - CORRECT ANSWER -What is the Period of
a wave?



How far the quantity that is in oscillation has moved from its mean (rest) value. - CORRECT
ANSWER -What is Displacement of a wave?



The maximum value of displacement in the oscillation cycle. Always measured from the mean
position. - CORRECT ANSWER -What is the amplitude of a wave?



Waves transfer energy from one point to another without causing any net movement of
material. - CORRECT ANSWER -Explain a wave



The distance along the wave in its direction of travel (propagation) between consecutive points
where the oscillations are in phase. - CORRECT ANSWER -What is wavelength?



v = fλ - CORRECT ANSWER -What is the wave equation?

, The difference between two waves of the same frequency and wavelength where 360degrees
represents a single whole cycle. - CORRECT ANSWER -What is Phase Difference?



The particles are displaced in the same direction that the wave travels. - CORRECT ANSWER -
How do particles behave in a longitudinal wave?



In a transverse wave the displacement is at right angles to the direction of the wave travel. -
CORRECT ANSWER -How do the particles behave in a transverse wave?



Compression (squashed)

Rarefaction (spread out) - CORRECT ANSWER -What are the two parts of a longitudinal wave.



Longitudinal

And

Transverse. - CORRECT ANSWER -What are the 2 types of wave?



Diffraction is the tendency of a wave to spread out in all directions. - CORRECT ANSWER -What
is diffraction?



The wave energy passing through an object and mostly continuing forward in the original
direction. - CORRECT ANSWER -What is transmission of a wave?



Wave energy that bounces of a surface and has its direction of travel altered by 180degrees -
CORRECT ANSWER -What is reflection

Each +ve ion is surrounded by 6 -ve ions and vice versa.

Strong electrostatic attraction in every direction.