What are the different ways one can invest in Gold?

Ways other than just buying gold.
Are there bonds or other ways? I'm a Finance student.

The people above provide good answers,but they didn't fully address one important point.
The dollar is weak right now.NEVER EVER buy gold when the dollar is weak.
That's just a fancy way of saying that gold is expensive to buy right now.
If you're really interested in investing in gold you're going to want to wait for the dollar to get stronger.Or to put it another way,you want to wait until the price of gold comes down.
Then you buy.Then you hold.Some times for a long time.Some times for a REAL long time.
Do some research.The information you seek is readily available on the internet.
Try to find the average highs and lows of the price of gold over the last 50 years.That might give you some idea of when you'll want to jump into the market.But be careful! Past performance does not guarntee future results! The same is true of any investment,especially if you're only planning to hold an investment short term.
Good luck!

buy gold stocks or the metal itself (storage is a problem)..u can also buy gold futures or options on gold stocks (to get more leverage)..finally, you can buy gold ETFs.

Buy bullion and store it yourself(not recommended)
Buy bullion and have that company store it for you(you will pay storage yearly)
Buy gold stocks(already priced high).
Buy mining stocks that diversify in many ores.
Buy jewelry, if you can find deals.

Open a brokerage account at Zecco and invest in the ETF GLD and IAU.