1. The diagram below shows a glass tank completely filled with a block of ice. After 1 hour, it was noticed that the block of ice had melted as shown in the diagram below. 1 point 1 hour later Height of ice Height of water A glass tank completely filled with a block of ice The glass tank filled with water Which one of the following best explains the observation? The melted ice has a smaller mass than the ice cube. The melted ice has a smaller volume than the ice cube O The melted ice can be compresses to fit the volume of the glass The melted ice has definite shape and takes the shape of the glass​