One pack of ground beef, a loaf of bread and 3.5 apples are examples of objects that weigh approximately 500 grams. The equivalency of 500 grams is around 1.1 pounds.
Grams are a metric unit for measuring mass, which is different than weight. One gram weighs about the same as a paperclip, a pinch of salt or dollar bill. Other common metric units for mass are kilograms (1 kg = 1,000 g) and tonnes. The standard units for mass are ounces, pounds and tons. A metric ton weighs slightly less than a standard ton, so it is important to keep in mind whether standard or metric units are being used.