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Studying the population - Migration
EduBook Organización
- 2179 visitas
As you have learned previously, the population of a place varies according to natural increase and migration. Migration includes the number of people that move to a place (immigrants) and the people…
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True / False. Tectonic plates.
EduBook Organización
- 2148 visitas
Are these sentences true or false? The geosphere is completely solid and the rocks in the geosphere cannot change shape or move. The tectonic plates are around 100 km thick. They are made up of sections…
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Other components of our Solar System
EduBook Organización
- 1953 visitas
4.1. Satellites Satellites are small bodies that do not move around the Sun. They move around other bodies in the Solar System. Most satellites are spherical, such as the Moon, although there are also…
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Simple machines
EduBook Organización
- 3491 visitas
What are machines? Machines make our work easier because they help us to do different things. There are two types of machines: simple machines and compound machines. Simple machines Levers A basic lever…
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Heat and temperature
EduBook Organización
- 3330 visitas
2.1. What is temperature? When a body receives energy in the form of heat, it stores it in the form of internal energy and its particles move more quickly. Temperature is an indicator of the speed of a…
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Plants are living things
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- 7278 visitas
What are plants? Plants are living things. Like animals they are born, they grow, they reproduce and they die. Plants use seeds to reproduce. A new plant grows from a seed. Plants are different from…
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The nervous system
EduBook Organización
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Right now, you are reading these words and you understand them. If you see food when you are hungry, your mouth starts to water. If you burn your hand, you move it away immediately. You automatically do…
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True/false. The simplest invertebrates
EduBook Organización
- 4549 visitas
Are the following sentences true or false? Sponges are plants that live on rocks in the sea. Sponges have cells with flagella, called choanocytes, to move around. Most flatworms are parasites.…