Air replaces water.

Meaning: This means that air has taken the place of water, filling the empty container.

Choice of Words: Air is the mixture of gases that surrounds the earth and makes breathing possible. Replaces is a verb that means to take the place of something or someone.

Alternative Expressions

Air fills up the space that water used to take up.

Meaning: This means that the air is now in the place where the water used to be. It's like when you fill up a glass with water, the water takes up the space in the glass.

Choice of Words: Air is the stuff that we breathe in and out. It's all around us, even though we can't see it. Fills means to make something full of something else. Up means to move something to a higher place. Space means an empty area. Water is the stuff that we drink and swim in. Used means something that was done in the past. To means towards. Take means to get or receive something. Up means to move something to a higher place.

The air pushes the water out of the way.

Meaning: This means that the air is stronger than the water, so the air moves the water out of the way. It's like when you blow on a balloon, the air pushes the balloon out of the way.

Choice of Words: Air is the stuff that we breathe in and out. It's all around us, even though we can't see it. Pushes means to use force to move something. Water is the stuff that we drink and swim in. Out means to move something from inside to outside. Of means belonging to something.

Air is less dense than water, so it floats on top of the water.

Meaning: This means that the air is lighter than the water, so it stays on top of the water. It's like when you put a ball in a pool, the ball floats on top of the water.

Choice of Words: Air is the stuff that we breathe in and out. It's all around us, even though we can't see it. Less means not as much. Dense means how much stuff is in a certain space. Water is the stuff that we drink and swim in. So means because of something. Floats means to stay on top of something. On means on the surface of something. Top means the highest part of something.

Related Expressions