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Work it out. Animal reproduction
EduBook Organización
- 1 lo usan
- 1699 visitas
A scientist proposes to measure the effect of temperature on the growth of tadpoles. To do this, he prepares two tanks of water. Tank A contains water at 20 °C, and tank B, at 24 °C. He quickly…
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Analyse. A text
EduBook Organización
- 1884 visitas
Polyembryony Polyembryony is a type of sexual reproduction in which an embryo fragments into several identical embryos. They each develop independently. The young of each litter are of the same sex, as…
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Interpret. The behaviour of molluscs
EduBook Organización
- 1888 visitas
Look at the picture and answer the questions: Look at the drawings. Explain what is happening. What is the stimulus for this behaviour? What is the response? Is this an innate or acquired behaviour?…
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Temperature and insect growth
EduBook Organización
- 1880 visitas
The body temperature of an insect varies according to the temperature of its surroundings. This is why insects grow more quickly in summer and more slowly in autumn and winter. Each species has its own…
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Complete. Protons, neutrons and electrons
EduBook Organización
- 1886 visitas
Create a table for protons, neutrons and electrons with the headings: charge and location in the atom, using the picture.
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Calculate. Pressure
EduBook Organización
- 1886 visitas
Calculate the pressure exerted on snow by the feet of a man with a mass of 81 kg if you know that the total surface area of the soles of his boots is 0,6 m2? Note: g = 9,8 m/s2. P = Pa
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Choose. Upthrust and buoyancy
EduBook Organización
- 1878 visitas
Choose the correct answer: What equals the upward thrust experienced by a submerged object in a liquid? What is the apparent weight of an object? What happens if the weight is less than the upward…
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Final Autoevaluation T10 02 - Obtaining and using energy
EduBook Organización
- 1886 visitas
Calculate the work being done: By a person who pushes a wheelbarrow for a distance of 100 m if he exerts a force of 500 N. W = J By a person pushing a very heavy block, failing to move, exerting a force…
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The propagation of heat
EduBook Organización
- 1882 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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Think about it. Light and colours
EduBook Organización
- 1888 visitas
Remember what you have studied in this section and answer the questions: Why is snow white, coal black and grass green? → ...is... because it reflects... and absorbs... If light from the Sun can be…
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