Sand and marbles would not be a solution. A solution has a solute (a solid) and a solvent (a liquid). You must also not be able to just separate the two. Sand and marbles would not be a solution because you can simply pick out the marbles, and there is no solvent!
It is sand-I did the question
Sand, marbles, and water can be a mixture.
Use a magnet.
No, sand is generally a heterogeneous mixture.
Your question is too broad. How big are the marbles and how big is the bag?
It is sand-I did the question
Sand, marbles, and water can be a mixture.
No, it is a mixture.
Use a magnet.
it's a mixture !
You have to pick them up
Because there was plenty of space between the marbles.
No. The litre is a measure of volume, so your question cannot be answered. Try this... Would a litre of marbles and half a litre of sand occupy 1.5 litres? No, the spaces between the marbles would be filled with sand, so the total volume will be a bit less than exactly 1.5 L.
A kilogram is a kilogram, no matter what.
It's the same weight
pour in water. The water will fill in the space that the sand is leaving open. This "open area" would not exists if the sand was taking the shape of it's container. alternately, use a bunch of marbles. Sand is not much different then a marble other then in size. The marbles can show on a larger scale what is happening with the sand.
salt with water is a soultion