IXL | Determine the meaning of domain-specific words with pictures

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Scientists often classify ocean environments based on what happens at different depths of water. The top layer of the ocean is called the photic zone. It is lit by sunlight, and it goes to about 650 feet below the ocean's surface. Most ocean life can be found in the photic zone.

Below about 650 feet, the water in the ocean is completely dark. This is called the aphotic zone. Aphotic means without light. Because there is no light, there is also very little life in this layer.

Match the words with the pictures.

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question

Read the text.

When you think of muscles, you might think of the ones in your legs or arms that you use to help you move. These types of muscles are called striated muscles. If you look at them under a microscope, the cells appear rectangular and striped. There are other kinds of muscles, though, called smooth muscles. The cells that make up smooth muscles are oval-shaped and not striped. They are found in places like the digestive system, where they help to keep food moving.

Match the words with the pictures.

solution

A smooth muscle is not striped. The cells that make up smooth muscles are oval-shaped.

A striated muscle is striped. The cells that make up striated muscles are rectangular.

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