Representative serves for two years while senate serves for six years.
Senate contains 100 members whereby we have two per state. House has 435 which is based on the population of the state depending on the most recent census.
Following U.S constitution for one to qualify to be a senator should have 35 years of age and above.
Representative serves starting age of 25 years. Revenue and taxation bills are proposed by the house and determine whether a government official can be tried for crimes which might be against the united states.
Treaties are only confirmed by Senate and can also reject or confirm any presidential appointees.