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Structure of a tapeworm
EduBook Organización
- 1918 visitas
Adult tapeworms are intestinal parasites of vertebrates. They have a very simple structure. Tapeworms do not have a respiratory, circulatory or digestive system. Their body is ribbon-shaped, with a head…
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Learn. Observe thermal equilibrium
EduBook Organización
- 1784 visitas
What do we need? Three glass containers A thermometer A glass rod What do we do? Put hot water in one of the containers (A) and cold water in the other (B). Measure the temperature of the water in both…
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Look and answer
EduBook Organización
- 1500 visitas
Look and answer: Put a ruler over the scale. How long is it? This scale shows that 3 cm on a map represents 30 cm in reality. Now measure the scale of the street map on this page. What does 2 cm on this…
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Learn...Meteorogical instruments
EduBook Organización
- 1400 visitas
Specialised instruments are used to record weather variables such as pressure, temperature, humidity, rainfall, wind strength and wind direction. These instruments are found in weather stations. An…
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Ancient Roman units of length or distance
Cristina Seco Organización
- 683 visitas
The ancient Romans were sophisticated engineers, and consequently had well-defined units of measuring lengths and distances, and their relationships to each other are well known. However, no actual…
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Complete. Pressure
EduBook Organización
- 3017 visitas
Complete the text with the correct words. The relationship between force applied and the surface area it is applied to is : , P, is the ratio of the applied, F, to the , A, over which it is exerted: P =…
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