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Choose. Years
EduBook Organización
2191 visitas
Match the following characteristics with the type of year: official year, sidereal year or leap year. It last for 365 days. It last for 365 days, 6 hours and 9 minutes. It lasts for 366 days. There is…
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True/false. Eclipses
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2197 visitas
Are the following sentences true or false? An eclipse happens when the Earth and the Moon are the same distance away from the Sun. A solar eclipse happens when the Moon is between the Earth and the Sun.…
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Introduction - The Atmosphere
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The Earth is surrounded by a mixture of gases we call the atmosphere. The air we breathe is part of the atmosphere. The atmosphere is composed of a series of layers. The most important layer is the…
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Minerals (II)
EduBook Organización
1 lo usan

1995 visitas
3.1. Mineral properties Mineralogy is the science of studying minerals. Minerals can be identified according to their physical and chemical properties. The most important properties are density,…
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Fossils
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2195 visitas
Fossils are the remains or signs of activity, such as excrement and footprints, of organisms that lived in the past. These remains or signs have been preserved in rocks. Fossils help us to know which…
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True/false. Evolution and biodiversity
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2189 visitas
Are the following sentences true or false? The term biodiversity includes all the minerals in the Earth's crust. Biological evolution is the gradual transformation of living things in order to adapt…
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Choose. Illnesses caused by bacteria
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Decide if the following illnesses are caused by bacteria: anthrax botulism flu Down syndrome tuberculosis measles
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Answer. Echinoderms 3.2
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2192 visitas
Echinoderms do not have feet but they can move around the seabed. Explain how these animals move.
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Final self-evaluation 11.04 - The Animal Kingdom (II). Vertebrates
EduBook Organización
2185 visitas
Identifica las características de las aves y señálas: Extremidades anteriores transformadas en alas. Fecundación externa. Cuerpo cubierto de plumas. Pico cartilaginoso adaptado al tipo de…
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Unit 12: The Animal Kingdom (II). Vertebrates
EduBook Organización
1 lo usan

1993 visitas
Aerodynamic (adj): designed or shaped in a way which reduces resistance to the air. anuran (n): an amphibian without a tail. beak (n): the hard part of the mouth of a bird. biped (n): an animal with two…
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