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### Course: 9th grade reading & vocabulary >Unit 3

Lesson 2: Close reading: informational text

# How can a text have two or more main ideas? | Reading

Texts can contain more than one main idea: multiple, equally-important arguments can be threaded through a single text. To identify if a passage has two main ideas, ask yourself if both ideas are equally important or if one is just supporting the other.

## Want to join the conversation?

• At David said algae would take over the ocean if sharks were extinct. But wouldn't it be, like the exact opposite, because there would be more fish eating the algae?
• Your logic's correct, but the story David reads out is missing a step. Sharks eat smaller fish, but those small fish eat even smaller organisms that eat algae, like shrimps and clams and things. When the sharks disappear, the predatory fish populations will grow, and the smaller organisms' populations will decrease as a result. They are the predator of algae, which means algae will grow unchecked.
• Man I can’t tell if some of these people are teachers or just smart students
• Everyone can be a teacher, even you. There are things you know that others do not, and you can choose to help learn. For example, one of my daughters is only four years old, but she teaches my one year old daughter how to walk, jump, play, and even sings her songs and is helping show her colors.
• At David sing's a song
• How can you be in two places at once when you're not anywhere at alllll!
• If we do the splits, arent we going in 2 directions at once?
• Interesting point. I suppose you could think of it as going in three directions even - left and right for each leg, and your torso going down.
• Is David the best teacher?
• Yes definitely!
• did anyone listen to David singing at the end?? Or was it just me? David is one of the funniest in khan academy.
• Yea bro he's the best
• that shark is the scariest thing i have ever seen in my life 🦈
• these are all opinions about the shark because that is what you think.
• "hE's So sCaRy" got me cracking up.
• Technically your body can be split in half right? So then it can travel to 2 places at the same time.

#Im-joking-and-im-not-a-murderer