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Main Idea and Details

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Main Idea and Details

Read each passage closely. Identify what the whole passage is mostly about, then use details from the text to support your thinking. For written responses, answer in complete sentences.

Read for the Big Idea

At the school science fair, Malik and Chloe presented a model that showed how urban trees can help cool a neighborhood. Their experiment compared the temperatures under a small shade canopy and in a sunny spot. The shaded area stayed cooler. They also explained that tree leaves release water vapor, which can cool the air, and that tree canopies block some sunlight from reaching sidewalks and buildings. Their display showed how planting trees can make hot neighborhoods more comfortable.

1.Which sentence best states the main idea of the passage about Malik and Chloe’s project?
  • Trees can make neighborhoods cooler and more comfortable.
  • Thermometers measure how hot or cold a place is.
  • The science fair included a model of a city block.
  • Sidewalks and buildings can receive sunlight.
2.Select three details from the passage that support its main idea.
  • The shaded area stayed cooler than the sunny spot.
  • Leaves release water vapor that can cool the air.
  • Tree canopies block some sunlight from sidewalks and buildings.
  • The students displayed their work at a science fair.
  • The project used a thermometer.

Find the Main Idea and Supporting Details

At the science fair, Carlos demonstrated a simple way to reduce the amount of water used to clean paintbrushes. He placed a jar of water beside each work area and asked students to rinse brushes in the same jar instead of turning on a faucet. He also showed how to wipe extra paint from a brush with scrap paper before rinsing. By the end of the demonstration, the group had used less running water and needed fewer paper towels to clean up.

3.Write the main idea of the passage about Carlos’s demonstration in your own words.
4.Give three details from the passage that support its main idea.
5.Name one result of Carlos’s method described in the passage.

Summarize a Passage

During a science fair, Chloe presented a project about how engineers make bridges stronger. She built three small bridges from craft sticks and used the same weight on each one to test them. The bridge with triangle-shaped supports held the most weight. Chloe explained that triangles help spread a load across a structure, while a flat span can bend more easily. Her project showed why bridge designers carefully choose the shapes used in supports.

6.What is the main idea of the passage about Chloe’s bridge project?
  • Triangles can help bridge supports hold more weight.
  • Craft sticks are useful materials for school projects.
  • Chloe tested three bridges at a science fair.
  • A flat bridge span is always unsafe.
7.Write a two- or three-sentence summary of the passage. Include its main idea and the most important supporting details.
8.How do the results of Chloe’s test support the main idea?
9.Which choice is the best summary of Chloe’s project?
  • Chloe made three bridges from craft sticks for a science fair.
  • Triangles help bridge supports spread weight, as shown when Chloe’s triangle-braced model held the most.
  • Chloe learned that flat bridges cannot hold any weight.
  • Bridge designers use many different materials to build structures.
10.In your own words, explain how identifying a passage’s main idea can help a reader understand it.

3 printable pages

  • Read a science fair passage about how trees can cool neighborhoods and identify its main idea and supporting details.

    Page 1

  • Analyze Carlos’s science fair demonstration for water-saving main ideas and evidence.

    Page 2

  • Summarize Chloe’s science fair bridge experiment and explain how details support its main idea.

    Page 3

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