Satellites monitor sea levels.

Meaning: Satellites watch how high the sea levels are.

Choice of Words: Satellites are human-made objects that orbit the Earth. Monitor means to watch or observe something carefully. Sea is the large body of salt water that covers most of the Earth's surface. Levels refers to the height of the sea.

Alternative Expressions

Satellites keep an eye on the height of the water in the oceans.

Meaning: This means that satellites are watching the level of the water in the oceans to see if it is going up or down.

Choice of Words: Satellites are like special cameras that orbit the Earth, taking pictures and sending them back to us. Keep an eye on means to watch or monitor something. Height is the distance from the bottom to the top of something, and water is the liquid that falls from the sky and fills up rivers, lakes, and oceans. Oceans are the large bodies of salt water that cover most of the Earth's surface.

Space gadgets watch the amount of water in the seas.

Meaning: This means that satellites are looking at the amount of water in the seas to see if it is going up or down.

Choice of Words: Space gadgets are another way to say satellites. Watch means to look at something, and amount means how much of something there is. Water is the liquid that falls from the sky and fills up rivers, lakes, and oceans. Seas are smaller than oceans, but they are still very large bodies of salt water.

Things that orbit Earth measure how deep the ocean is.

Meaning: This means that satellites are measuring how deep the ocean is to see if it is getting deeper or shallower.

Choice of Words: Things that orbit Earth are satellites. Orbit means to go around something in a circle. Measure means to find out how much of something there is. Deep means how far something is from the top to the bottom, and ocean is the large body of salt water that covers most of the Earth's surface.

Related Expressions