This printable is aligned with CCSS.ELA-Literacy.RI.9-10.1, CCSS.ELA-Literacy.RI.9-10.4, CCSS.ELA-Literacy.RI.9-10.6, CCSS.ELA-Literacy.RI.9-10.7, CCSS.ELA-Literacy.RST.9-10.1, CCSS.ELA-Literacy.RST.9-10.4, CCSS.ELA-Literacy.RST.9-10.6, and CCSS.ELA-Literacy.RST.9-10.7 Lexile - 920L, 197 words

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Science Reading Annelids and Arthropods - Grade 10 (Grade 10)

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Annelids and arthropods are two of the main groups of invertebrate animals.

Annelids are the segmented worms. Their bodies are divided into individual segments and some species have bristles on their surface to help them move through the soil. Their main function in the ecosystem is to recycle decaying matter. They eat all of the detritus in the soil, which after passing through their digestive systems, is high in nutrients. They also keep the soil aerated. This earthworm is an example of a common annelid.

The arthropods are the largest category of animals on Earth. This group includes the insects, crustaceans (lobsters and crabs), spiders, and millipedes. They have an outer shell called an exoskeleton to protect their bodies (this is why they go "crunch" when you step on them). They also have jointed legs that allow them to maneuver over many different surfaces and also different numbers of antennae.

This grasshopper is an example of an arthropod. It is classified as an insect because it has six legs and one pair of antennae. Its relatives in the ocean, called crustaceans, can have 10 legs and two pairs of antennae. Lobsters and crabs are in this group.
The author includes two images in the passage. These images help the reader:
  1. describe the parts of an exoskeleton.
  2. understand how annelids digest their food.
  3. distinguish between annelids and arthropods.
  4. show a picture of a crustacean.
Based on the information in the passage, what causes the "crunch" you hear when you step on a grasshopper?
  1. its jointed legs
  2. its exoskeleton
  3. its antennae
  4. its thorax
The author says annelids have segmented bodies. Based on the information in the passage, SEGMENTED means
  1. contains a backbone
  2. lack of a backbone
  3. kept as a whole
  4. divided into parts
Why did the author most likely write this passage?
  1. to explain where annelids and arthropods came from
  2. to contrast earthworms and grasshoppers
  3. to describe two of the main groups of invertebrate animals
  4. to encourage readers to protect insects
All arthropods are insects.
  1. True
  2. False

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