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True / False. Tools
EduBook Organización
- 2430 visitas
Are these sentences true or false? A tool is an instrument that we use to make our work easier. We operate tools using our hands. Humans used rocks, bones and sticks to make the first tools. When humans…
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Self-assessment T10 08 - Machines and structures
EduBook Organización
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Complete the text with the correct words: A is an instrument that we use to make our work easier. We operate tools using our . Humans used , bones and sticks to make the first tools. These included…
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The propagation of heat
EduBook Organización
- 2370 visitas
Heat transfers from a hot object to a cold object by means of three mechanisms: conduction, convection and radiation. 6.1. Conduction Heat is transmitted through solid substances by conduction (figure…
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How did Neolithic people make metal objects?
EduBook Organización
- 2214 visitas
In the Metal Age, people who worked with metals were called smiths. They learnt to use fire and heat to make metal tools. They did this in the following way: Heating. The smiths heated the metal ore to…
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Tools and machines
EduBook Organización
- 2028 visitas
What is a tool? A tool is an instrument that we use to make our work easier. We operate tools using our hands. Humans used rocks, bones and sticks to make the first tools. These included axes, hammers…
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Unit 1: Matter and Materials
EduBook Organización
- 1862 visitas
Alloy (n): a homogeneous mixture made up of metals or of a metal and a non-metal. atom (n): the smallest unit of matter, composed of particles called protons, neutrons and electrons. boiling point (n):…
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Final self-evaluation 03 - The Earth's Crust
EduBook Organización
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Are the following sentences true or false? The Earth's outermost layer is called the crust. Ocean trenches are long, narrow depressions in the floor of the ocean. The most common elements in the…
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