The internal temperature of meatballs is an important factor in ensuring they are safe to eat. According to the search results, the minimum internal temperature for meatballs should be 160°F (71°C) . Here are some methods for checking the temperature of meatballs:

• Instant-read thermometer: Insert an instant-read thermometer into the middle of the meatball to check the internal temperature. The thermometer should read at least 160°F (71°C) .

• Visual inspection: Meatballs should be browned on the outside and cooked through on the inside. They should not be pink or raw in the middle.

• Cooking time: The cooking time for meatballs can vary depending on the size and recipe. For example, baking meatballs in the oven at 400°F (204°C) for 20-24 minutes should result in evenly cooked and nicely browned meatballs.

It is important to note that the safe internal temperature for meatballs made with pork or chicken may be higher than 160°F (71°C). In this case, it is recommended to use a digital thermometer to check the internal temperature and ensure they are fully cooked.