Chemistry
Genetics/ Human Bio
Plant Bio
Physics
Electricity
100
What is the correct ionic formula for Zinc Chloride Zn+2 Cl -1
ZnCl2
100
Define the term allele
an alternative form of a gene
100
What is the function of the cotyledon in a seed
Provides the seedling with a food supply until it is able to photosynthesis
100
Name the force that slows things down and stops objects from moving
Friction
100
What is the symbol for a light bulb?
a circle with a cross inside
200
Electrons are arranged in shells around an atom. How many electrons can fit into the first and second electron shells?
1st= 2 2nd = 8
200
Explain the difference between continuous variation and non continuous variation
Continuous variation is where there is a range of pheontypes. Non continuous is where there is only two phenotypes
200
Explain why seeds dont need sunlight to germinate
Most seeds are underground so do not recieve any sunlight. they have the cotyledon to provide the baby plant with food/energy
200
A man is trying to push a rock accorss the floor. he pushes hard but the rock does not move. explain why he has done no work
work = fxd he has not caused the rock to move so no work has been done
200
Name the device that makes it harder for electrons to move around a circuit
resistor
300
explain how your could use litmus paper to figure out if a beaker of clear liquid was an acid base or neutral
put the paper in the liquid if both types of paper stay the same colour the liquid is neutral if red paper turns blue and blue stays blue it is a base if blue paper turns red and red paper stays red it is an acid
300
Explain what a capillary is
they are small thin blood vessels where oxygen and nutrients pass from your blood into your cells and where carbon dioxide passes from your cells into your blood
300
how do you test for starch?
boil a leaf in meths, rince leaf, put iodine on leaf if it turns blue black then starch is present
300
A person has a mass of 55kg. Calculate their weight force
550N
300
what does an ammeter actually measure
the anount of electrons passing through a circuit every second
400
Explain how and why atoms become ions
They lose of gain electrons to complete their outer electron shell to become more stable
400
Explain why there are three different genotypes for Tongue rolling but only two phenotypes
TT and Tt have the same phenotype because they each have one dominant allele so have the dominant phenotype. tt produces the recessive phenotype
400
Explain some of the disadvantages for a plant if it is pollinated by an animal/bird/insect
it has to put lots of energy into making colourful flowers nector and scents
400
A 1.5 kg ball is kicked and is travelling at a speed of 50m/s. Calculate the amount of kinetic energy the ball has
37.5j
400
A girl slides down a slide and at the bottom all her hair is standing on end. Explain (in relation to static electricity) how this has happnened
the girl has either picked up electrons or lost electrons as she has travelled down the slide. all her hair has the same charge and like charges repell each other which causes her hair to stand on end.
500
Magnesium carbonate + Sulphuric acid give what?
Magnesium sulphate + carbon dioxide + water
500
explain the difference between veins and arteries
arteries have thicker walls than veins as bood is under high pressure in these blood vessels. Veins have thin walls as the blood is under low pressure. Arteries take blood away from the heart and veins take blood back to the heart
500
Explain a disadvantage of plants reproducing asexualy
if the environment changes all the plants could die as they have the same genes
500
rearrange this formula to make g the subject: E = mxgxh
g=e/(mxh)
500
explain how the movement of electrons causes a light bulb to glow
as the electrons pass through the light bulb they cause the metal to vibrate which produces heat and light.
M
e
n
u