How Does the Author Develop the Central Idea

What is the difference between the main idea & the central idea?

• There is no difference between these two terms.

• The term main idea is used when discussing literary text, and the term central idea refers to informational text.

• Main idea is used in science and math. Central idea is used in reading and language arts.

Which statement below best reflects the central idea of the passage?

• Cooking byproducts can be used as fuel today.

• Waste from human consumption is biomass.

• Biomass comes from living things and has many uses.

Which detail most strongly supports the idea that biomass can provide a way to preserve our natural resources?

• Cow manure has multiple uses today.

• Biomass has the ability to relieve human dependence on fossil fuels.

• Biomass is energy from organisms and their waste.

How does the author develop the central idea of the passage?

• by explaining the process of an adult jellyfish becoming a polyp

• by explaining the cause of the immortal jellyfish reverse lifecycle.

• by describing how the polyp is less helpless than the adult jellyfish.

• by describing the process of a jellyfish aging and dying naturally.

Choose the sentence that best restates the central idea of the passage.

• Some species of jellyfish can live longer than others.

• T. dohrnii are found in oceans around the world.

• Almost all jellyfish can reverse the aging process.

• The jellyfish T. dohrnii can, in theory, live forever.

The key details in paragraph three and four support the main idea by....

• explaining the necessity of pushing oneself.

• giving examples of interval running.

• detailing reasons why running is beneficial.

• describing the process of warming up.

Which statement best reflects the central idea of the article?

• Learning to run is hard, but possible with practice.

• A person should walk some weeks and run others.

• Running and walking intervals should always be even.

• Learning to run long distances is not for beginners.

How does the author develop the central idea of the passage?

• By comparing a glowing esca to the light made by fireflies.

• By explaining how various species of fish catch their prey.

• By contrasting male and female anglerfish hunting methods.

• By comparing escas to lures or bait attached to fishing poles.

What is the central idea of the passage?

• Anglerfish are mostly found in the deep sea.

• Male anglerfish do not have esca to attract prey.

• Female anglerfish use escas to attract prey.

• Bacteria make the escas of all anglerfish glow.

How do key details in paragraphs three and four support the central idea?

• by explaining the difference between projecting images and taking photographs.

• by describing how cameras now store photographs digitally on much smallerdevices.

• by describing the usefulness of cameras on mobile phones and other electronics.

• by explaining the importance of advancements in digital camera technology.