Unit 1 Revision

Question	Answer
what does the boiling point and viscosity of a hydrocarbon depend on?	the number of carbon atoms it contains
what happens to the boiling point and viscocity when the number of hydrocarbons increase?	they both increase
what does the furnace do in relation to crude oil?	heats up the crude oil and turns it into gas
what hydrocarbons are found in refinery gas?	ethane, propane and butane
how is limestone formed in animals?	CO2 dissolves in water, used by animals to make shells, dead animals leave shells, shells converted to CaCO3 over a long time period
what belief does the red shift support?	supports the belief that stars and galaxies are moving further away from the earth and that the universe is expanding
how does energy enter the food chain?	it enters as light when plants photosynthesise
how does energy leave the food chain?	energy is lost as heat - in respiration, chemical energy, waste

Resource summary

	Created by tamaraappiah about 9 years ago