is a marble heavy more than 1 pound
What kind of marble are you discussing? The small marbles used for playing are less than one pound.
To determine if a marble is heavier than 1 pound, you need to know the weight of the marble. One pound is equal to 16 ounces. You can use a scale to measure the weight of the marble. Place the marble on the scale and read the weight displayed.
If the weight of the marble is more than 16 ounces, then it is heavier than 1 pound. If the weight is exactly 16 ounces, then it weighs exactly 1 pound. If the weight is less than 16 ounces, then it is lighter than 1 pound.
Keep in mind that marbles generally weigh much less than 1 pound. They are typically a few grams in weight.