1.1 Cells team reading (classwork)

1. 1.1 Cells team reading (classwork) Both partners should be ___________ while the other is reading. At the end of the paragraph, the partner that was not reading _______________- Directions Debrief questions Paragraph 1 summary Paragraph 1 Summary goes here Paragraph 2 summary Paragraph 2 Summary goes here Paragraph 3 summary Paragraph 3 Summary goes here Paragraph 4 summary Paragraph 4 Summary goes here Classwork

2. Work Hard. Get Smart. Scientist’s Name: _________________________________ Class: 6__ Date: ______________ A Closer Look at Cells • DIRECTIONS: Below are the directions you will follow during today’s partner reading activity.Read the directions, then answer the questions at the bottom. • If you are sitting to the left of your partner, you are Partner A.If you are sitting to the right of your partner, you are Partner B. Which are you? • Partner A is the reader for the first paragraph, while Partner B follows along silently.Both partners should text-mark by underlining to answer this purpose question:“What are cells?” • Partner B is the summarizer for the first paragraph. When Partner A is done reading, Partner B attempts to summarize the paragraph in one short sentence. • Partner A can agree and both partners write it down to the right of the paragraph,or Partner A can (respectfully) disagree, and the two partners will work together. • For the next paragraph, Partner B becomes the reader and Partner A is the summarizer.Continue this pattern until you are finished with the entire reading. • When you are done with the reading and summaries, move on to the reading questions at the back of this packet. • Congratulations!You have successfully read a non-fiction text on cells! • Directions Debrief Questions: • What should both partners be doing while one partner is reading? ____________________________________________________________________________________________ • What does the partner who was NOT reading do at the end of the paragraph?__________________________________________________________________________________________________________________________________________________ 1

3. A Closer Look at Cells A forest is filled with all kinds of amazing creatures. Some are easy to spot, like the California redwood, which can grow up to 379 feet. Some are harder to see. If you look carefully at the floor of the forest, you might see some small mushrooms, and a tiny black-and-red salamander scurry past your feet. Now, the tree, the mushrooms and the salamander might seem very different, but they all have one thing in common. They are all made of cells! In fact, all living things are made of cells. So, what are cells? Cells are the basic units of structure and function in living things. This means two things. First, it means that all organisms, or living things, are built of cells, just like buildings are built of bricks. Second, it means that cells carry out all of an organism’s functions – such as making energy. When you describe the structure of an object, you describe what it is made of and how its parts are put together. For example, the structures of many buildings are determined by how bricks, steel beams and glass are arranged. The structures of living things are determined by the amazing ways that cells are put together. A salamander’s cells, for example, form a body, a head, four legs and a tail. An organism’s functions are the jobs it performs to stay alive. For example, many living things need to get oxygen, get rid of waste products (like urine), get food, and grow. Cells help with all of these functions! For example, cells in your digestive system absorb food. The good provides your body with energy and the materials you need to grow, allowing you to survive. Below is a picture of some human skin cells. One dime-sized part of your skin contains over 100,000 cells! But no matter how clearly you look with your eyes,you won’t be able to see a skin cell.That is because they are too smallto be seen. Until the late 1600s,no one knew cells existedbecause there was no way tosee them. 2

4. Around 1590, the invention of the microscope allowed people to look at very small objects. The invention of the microscope made it possible for people to discover and learn about cells. A microscope is a scientific tool that makes small objects look larger. Some microscopes do this by using lenses for focus light. These lenses are similar to the clear, curved pieces of glass or plastic used to make eyeglasses. One of the first people to observe cells was an English scientist named Robert Hooke. Hooke built his own microscope, and in 1663, he used it to observe the structure of a thin slice of cork – thesame stuff that’s used to closewine bottles. He saw thepicture to the right. Hookethought the small spaces inthe cork looked like tiny,rectangular rooms, so hecalled these spaces cells –just like the small rooms wherecriminals live in a prison. Over the next 200 years, scientists built better microscopes, and learned more about cells. Eventually, scientists developed something called the cell theory – a theory is a hypothesis about how things work – to explain the relationship between cells and living things. There are three parts to the cell theory. First, all living things are made of cells. Second, cells are the basic units of structure and function in living things. Third, all cells can only come from other cells. Cells are truly amazing. Human beings are made of over 100 trillion cells. Those cells aren’t all the same; humans have skin cells, blood cells, muscle cells, neurons (brain cells), and much more! However, some organismsare made of just one cell, likethe tiny paramecium (pare-ah-me-sea-um) to the right thatlives in pond water. 3

5. Work Hard. Get Smart. Scientist’s Name: _________________________________ Period: __ Date: ______________ Mr. Adler – 6th Grade Science A Closer Look at Cells – Post-Reading Questions Aside from the fact that they are all alive, what do a tree, a mushroom and a salamander have in common? Your answer should use the word cells. _________________________________________________________________________ What is an organism? _______________________________________________________ Explain This Statement: Cells are the basic unit of structure in living things.__________________________________________________________________________________________________________________________________________________ Explain This Statement: Cells are the basic unit of function in living things.__________________________________________________________________________________________________________________________________________________ Cite specific evidence from the text to explain just how small cells are.__________________________________________________________________________________________________________________________________________________ What is a microscope? And how did it help people learn more about cells?__________________________________________________________________________________________________________________________________________________ How did Robert Hooke come up with the name cells for the smallest part of a living thing?__________________________________________________________________________________________________________________________________________________ Are all organisms made of many cells? Explain by citing evidence from the text.__________________________________________________________________________________________________________________________________________________ 5