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- Letra ch
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Summaries - Energy
EduBook Organización
- 2344 visitas
1. Energy Energy is the power that causes change in things and allows us to carry out work. Energy is produced by energy sources. The main source of energy on Earth is the Sun. Energy exists in several…
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Remember - The earth and the Moon
EduBook Organización
- 2342 visitas
We live on the planet Earth. The Earth has one satellite. It is called the Moon. The Earth and the Moon are part of the Solar System. The Solar System is made up of the Sun, the planets, satellites and…
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End-of-unit evaluation - Matter: Mass, Volume and Density
EduBook Organización
- 2284 visitas
All objects are made up of matter. As a consequence of this, they have mass, occupy a certain volume and have a certain density. Mass, volume and density are magnitudes. This means they have values…
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End-of-unit activities - Matter: Mass, Volume and Density
EduBook Organización
- 2257 visitas
All objects are made up of matter. As a consequence of this, they have mass, occupy a certain volume and have a certain density. Mass, volume and density are magnitudes. This means they have values…
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Introduction - Matter: Mass, Volume and Density
EduBook Organización
- 2243 visitas
All objects are made up of matter. As a consequence of this, they have mass, occupy a certain volume and have a certain density. Mass, volume and density are magnitudes. This means they have values…
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End-of-unit activities - Matter and materials
EduBook Organización
- 2239 visitas
Everything around us is made up of matter. Matter can be found in three states: solid, liquid and gas. The air we breathe is a gas, the water in rivers and seas is a liquid, and the rocks are in a solid…
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End-of-unit activities - Energy
EduBook Organización
- 2068 visitas
The Sun is the Earth's main energy source. The Sun provides plants and animals with light and heat. This means that they can grow, develop and live on Earth. Heat energy has other effects on…
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Self-assessment T10 02 - Machines and structures
EduBook Organización
- 2049 visitas
Complete these sentences with the correct words: Some objects become electrically when we rub one against the other. Electrical current is the flow of through materials. A is needed to create the…
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Why do boats float?
EduBook Organización
- 2047 visitas
If we make a little boat out of a walnut shell, we see that it floats and we relate this to the fact that the walnut shell is less dense than water. But what about real boats? Some of them are huge,…
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End-of-unit evaluation - Energy
EduBook Organización
- 2026 visitas
The Sun is the Earth's main energy source. The Sun provides plants and animals with light and heat. This means that they can grow, develop and live on Earth. Heat energy has other effects on…