Windows to the Universe

Milk is a typical liquid. A liquid takes on the shape of the container it is in; in this case a glass. Liquids have a distinct boundary called a "free surface"; in this case, near the top of the glass where the milk meets the air above it.
Image courtesy of Corel Corporation.

Milk is a type of liquid. A liquid takes on the shape of the container it is in. The milk has the same shape as the glass. Liquids have a surface. The surface of the milk is near the top of the glass where the milk meets the air above it.
Image courtesy of Corel Corporation.

Milk is a kind of liquid. A liquid doesn't have its own shape. It has the shape of the container it is in. The milk shown here has taken the shape of the glass.
Image courtesy of Corel Corporation.

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Milk is a typical liquid. A liquid takes on the shape of the container it is in; in this case a glass. Liquids have a distinct boundary called a "free surface"; in this case, near the top of the glass where the milk meets the air above it. Image courtesy of Corel Corporation.

Milk is a type of liquid. A liquid takes on the shape of the container it is in. The milk has the same shape as the glass. Liquids have a surface. The surface of the milk is near the top of the glass where the milk meets the air above it. Image courtesy of Corel Corporation.

Milk is a kind of liquid. A liquid doesn't have its own shape. It has the shape of the container it is in. The milk shown here has taken the shape of the glass. Image courtesy of Corel Corporation.

Milk is a typical liquid. A liquid takes on the shape of the container it is in; in this case a glass. Liquids have a distinct boundary called a "free surface"; in this case, near the top of the glass where the milk meets the air above it.
Image courtesy of Corel Corporation.

Milk is a type of liquid. A liquid takes on the shape of the container it is in. The milk has the same shape as the glass. Liquids have a surface. The surface of the milk is near the top of the glass where the milk meets the air above it.
Image courtesy of Corel Corporation.

Milk is a kind of liquid. A liquid doesn't have its own shape. It has the shape of the container it is in. The milk shown here has taken the shape of the glass.
Image courtesy of Corel Corporation.