Light & lenses
Name 2 types of lenses
Converging
Diverging
What produces male and female gametes?
name both parts
Testes and Ovaries
What are the 4 properties of acids?
sour taste
change in the colour of indicator
contains hydrogen ions and conducts electricity
reacts with metals, carbonates and bases
Name all the Abiotic factors that affect the balance within the ecosystem
Humidity
Temperature
Pressure
Precipitation
Exposure
Light intensity
Soil acidity, texture
What are isotopes
Isotopes have the same protons but different neutrons
The ray parrallel to the principal axis
The ray that passes through the optical centre
The ray that is refracted parallel to the principal axis
How has the oviducts adapted to facilitate implantation?
They have finger like structures that push the embryo out of the oviducts
What are the reactions of acids?
Acid and base gives salt and water
acid and metal gives hydrogen and salt
acids and carbonates gives salt co2 and water
How much energy is passed down in each trophic level of the food chain?
and how is energy lost
<10%
excretion and egestion
what is the electronic configuration of Calcium?
2.8.8.2
Name all the properties of an image formed in a plane mirror
The image is the same size
the image is equidistant
the image has the same orientation
it is laterally inverted
it is virtual
What are the STIs that can be cured in their early stages? and using what?
there are 2
Gonnorhoea
Syphilis
The proportion of ions and molecules in a ethanoic acid solution is fixed and constitutes an _______ _____?
fill in the blank
equilibrium constant
Name the ways Carbon dioxide is released into the environment, removed from the environment and the source of carbon storage
Respiration , combustion, decay/decomposition
Photosynthesis
Carbon sink
balance the following equation:
Al(OH)3 + H2SO4 -> Al2(SO4)3 + H2O
2 Al(OH)3 + 3 H2SO4 -> Al2(SO4)3 + 6 H2O
Name 2 ways in which optical fibre cables are used
Telecommunication
Endoscopy
What are the functions of the amniotic fluid?
there are 4
Supports and cushions the foetus while in the uterus
Absorbs shock
protects the foetus against physical injury as it cant be compressed
Allows the foetus to move freely.
name the range of color change in phenolphthalein and methyl orange
pheno - 8.1 to 10.0
methyl orange - 3.1 to 4.4
Name the 2 types of ecological pyramids
Numbers and biomass
if Uranium has mass number of 238, and has 92 protons, if it undergoes beta decay, and then alpha decay, how many protons will it have left? And state the resulting mass number
protons:91
mass number:234
Calculate the refractive index if i = 20 and r = 13
round answer to 2 dp
1.52
How is HIV spread from cell to cell?
The viral particles that have infected 1 cell will assemble and exit the cell to target more cells after binding to the infected cell and making copies of the viral genome and proteins
name the basicity of the following acids:
HCL, HNO3, H2SO4 ,CH3CO2H ,H2CO3 ,H3PO4
monobasic, monobasic, dibasic, monobasic, dibasic, tribasic
Name the 3 types of symbiotic interactions and give examples
Mutualism - Pollintaion insects get food from nectar and plants get their pollen transfered for reproduction
Commensalism - Cattle egrets follow the livestock and catch and feed upon the insects
Parasitism - Mistletoe attaches onto other plants and absorbs nutrients
Why can nuclear fission only occur in the sun?