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Think about it. Light, shadow and penumbra
EduBook Organización
- 2728 visitas
Remember what you have studied in this section and answer the questions: With a classmate, explain the difference between shadow and penumbra. What is the difference between an eclipse of the Sun and…
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Think - Living things and their habitat
EduBook Organización
- 2526 visitas
Look at the photos and answer the questions. Can these animals survive without water? Explain your answer. How long do you think each animal can survive without water? How long do you think humans can…
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Think about it. Sexual reproduction in plants
EduBook Organización
- 2409 visitas
Remember what you have studied in this section and answer the questions: Why do more evolved plants have a smaller gametophyte? Discuss with a classmate. What is the advantage and disadvantage of having…
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Think about it. The propagation of heat
EduBook Organización
- 2423 visitas
Remember what you have studied in this section and answer the questions: What does the heat absorbed during a change of state transform into? Why is heat absorption needed when a liquid changes to gas?…
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Think about it. Heat and temperature
EduBook Organización
- 2365 visitas
Remember what you have studied in this section and answer the questions: What two physical phenomena are used to calibrate a thermometer and why? Why do we also use the name centigrade for the Celsius…
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Think about it. The nature of light
EduBook Organización
- 2340 visitas
Remember what you have studied in this section and answer the questions: Look at the diagram of electromagnetic waves. State what happens to the wavelength, frequency and energy as you go from left to…
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Think about it. What plants need
EduBook Organización
- 2262 visitas
Remember what you have studied in this section and answer the questions: Why do plants sometimes need fertilisers to grow well? How does the way trees and animals get food differ? Which are autotrophs…
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Think about it. Reproduction in mammals
EduBook Organización
- 2233 visitas
Remember what you have studied in this section and answer the questions: What are the advantages of a) a long gestation period, and b) being born in the spring or summer? Describe the new-born offspring…
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Think and answer. Science and technology
EduBook Organización
- 2163 visitas
Think and answer: Describe what you can see in the photos. Give examples of scientific progress in the 20th century. Do you use the Internet? What do you use it for? What is an e-mail? How do you send…
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Think about it. Trophic relationships in ecosystems
EduBook Organización
- 2088 visitas
Remember what you have studied in this section and answer the questions: Are feeding relationships intraspecific or interspecific? Explain your answer. Why can there only be four or five trophic levels?…