Antoine put some metal into a container with air. He closed the container. He measured the weight of the closed container with the metal; it weighed 250 grams. Then he heated the container until the metal changed colors. He weighed the closed container after heating. Predict the weight of the closed container (greater than 250 grams, equal to 250 grams, less than 250 grams) after heating. Enter your answer in the space here.
