Yr10 Mock Flashcards
Why did you choose your answer to 1b?
It has the fewest tropic levels which means less energy is lost through excretion and respiration therefore more energy is passed on to the human
What is the answer to 1b?
C
What was the drug thalidomide originally developed to treat?
As a sleeping pill
Soon after it was developed, thalidomide was found to be useful in treating another condition. What was this condition?
Morning sickness in pregnant women
Describe one harmful effect of thalidomide
Limb defects
Suggest why this harmful effect had not been detected during clinical drug trials on thalidomide.
The drug was not tested in pregnant women
What happens in the body to make someone become dependant on a drug?
Changes to their chemical processes
Evidence in figure 4?
dependency on some legal drugs is more than or equal to on some illegal drugs, for example nicotine has a higher increasing dependency than class A drug ecstasy
Suggest one other piece of information about legal drugs that would need to be considered before the classification of these drugs was changed.
It’s effect on health
Hydrogen + oxygen —> ?
Water vapour
What is the electronic structure of a carbon atom?
2,4
What impact does coal have on the environment?
Carbon dioxide (global warming) and soot (global dimming)
Limestone contains calcium carbonate (CaCO3). Name the type of reaction that takes place when calcium carbonate is heated strongly. Name the products formed.
Thermal decomposition produces calcium oxide and carbon dioxide
What is the mean loss of table 3?
- 8+1.7+1.9=5.4
5. 4/3=1.8g
Suggest and explain two reasons why the mean mass lost in the experiments to heat limestone is less than 2.2 g.
The limestone contained impurities so less carbon dioxide was produced or the temperature was not high enough so the limestone didn’t fully decompose
Name the two types of hydrocarbon
Alkene and alkane
Describe the conditions in the reactor
High temperature and cataylsts
why air must not enter the reactor?
The oxygen might react with the hydrocarbons
Suggest a method that can be used to separate butene from the other hydrocarbons.
Fractional distillation
Describe how molecules of butene form poly(butene).
Many butane molecules form chains
Draw the structure of butene
H H H H | | | | C=C-C-C-H | | | H H H
How do animals and plants survive in hot climates?
Camels have large surface area to increase heat loss by radiation, hump with fat stores fat in hump can be converted to water via respiration, long eyelashes to keep windblown dust out of eyes, large flat feet to stop sinking, thick fur on top to protect from sun and thin fur elsewhere to allow easy heat loss and can tolerate body temperatures of up to 42 degrees.
Cacti decrease in surface area such as leaves are spikes thick wax reduced area reduces water loss protect from predators, extensive roots to absorb more water and fleshy / thick stem to store water
