Here's how to fill in the blanks using the word bank provided:
Solids are a type of matter that are hard and take their own shape. They have a definite mass, volume, and shape.
Liquids do not have their own shape but they take on the shape of their container. They have a definite mass and volume, but have an indefinite shape.
Gases have an indefinite shape and they tend to spread out to fill their container. They have an indefinite mass, volume, or shape.
So the completed text would be:
Solids are a type of matter that are hard and take their own shape. They have a definite mass, volume, and shape.
Liquids do not have their own shape but they take on the shape of their container. They have a definite mass and volume, but have an indefinite shape.
Gases have an indefinite shape and they tend to spread out to fill their container. They have an indefinite mass, volume, or shape.