Select the gas.
bat bones air inside a raft pair of dice water in a fishbowl
Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a solid. Also, some solids are very small. A grain of sand is a solid.
When matter is a liquid, it has a definite volume but not a definite shape. So, a liquid has a size of its own, but it does not have a shape of its own. Think about pouring juice from a bottle into a cup. The juice still takes up the same amount of space, but it takes the shape of the bottle.
Some liquids do not pour as easily as others. Honey and milk are both liquids. But pouring honey takes more time than pouring milk.
When matter is a gas, it does not have a definite volume or a definite shape. A gas expands, or gets bigger, until it completely fills a space. A gas can also get smaller if it is squeezed into a smaller space.
Many gases are invisible. Air is a gas.
A pair of dice is a solid. A solid has a size and shape of its own. When you roll a pair of dice, the dice have a shape of their own. They are still cubes when they stop rolling.
The air inside a raft is a gas. A gas expands to fill a space. The air in a raft expands to fill all the space inside the raft. If air leaks out, it will expand into the space around the raft.
A bat bone is a solid. A solid has a size and shape of its own. A bat bone has its own shape inside the bat.
The water in a fishbowl is a liquid. A liquid takes the shape of any container it is in. If you pour water from a fishbowl into a different container, the water will take the shape of that container. But the water will still take up the same amount of space.