Ask an Adviser - Investing and Risk

My partner and I have a few of term deposits with banks. One has just matured so we have about $15,000 that we want to use, possibly to invest in the stock market. Should we be investing in blue chip stocks or buy more less well-known stocks at a lower price, in the hopes of seeing higher returns? We don't want to throw this money away but were hoping for a higher rate of return than term deposits.