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Which Evidence Supports What is a free printable Grade 4 English worksheet on matching a piece of evidence to its claim, aligned to Common Core standard RI.4.8. It prints 2 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 8 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Which Evidence Supports What

RI.4.8

NameDate

Read the text, then answer the questions.

1.Read the text, then answer the questions.

What a Coral Reef Is

A coral reef looks like rock and is built by animals. A coral polyp is a soft creature the size of a pinhead. It draws calcium from the sea water and builds a hard cup around itself. Millions of polyps, cup upon cup, become a reef. Inside each polyp live tiny algae. The algae make food from sunlight and pass most of it to the polyp. In exchange they get shelter and the polyp's waste. Neither could build a reef alone. When the water gets too warm, the polyps expel the algae. Without them the coral turns white and starves. That is what bleaching means. A reef takes centuries to build and can bleach in a single hot summer.

  1. 1. The text says neither organism could build a reef alone. What evidence supports that?
  2. 2. What is the author's purpose, and how do you know?
2.Read the text, then answer the questions.

The Accidental Photograph

In 1895 Wilhelm Röntgen was working with a covered tube in a darkened room when he noticed a screen across the laboratory glowing. Something was passing through the cover and crossing the room. He did not know what it was, so he called it X — the unknown. He spent seven weeks alone in the laboratory testing it. He put wood, rubber and metal in the way. Metal stopped it; the rest did not. Then he asked his wife to put her hand between the tube and a photographic plate. The picture showed the bones of her hand and her wedding ring. Within a year, X-rays were being used in hospitals. Röntgen refused to patent them.

  1. 1. The text says Röntgen refused to patent X-rays. What does that suggest about him?
  2. 2. What is the author's purpose, and how do you know?

LessonPrint · RI.4.8 · Set 8 · free to copy for classroom use

Answer key — Which Evidence Supports What

Set 8. Prints on its own sheet.

  1. 1.1. The algae make the food; the polyp makes the cup and gives them shelter. 2. To explain what a reef is and why it is fragile — the last line makes the contrast explicit.
  2. 2.1. That he wanted them used freely rather than owned — it is stated as his choice. 2. To explain how an accident became a tool — the text follows the observation through testing to hospital use.

Last reviewed 2026-09-05. Aligned to RI.4.8 of the Common Core State Standards for English language arts.