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Astronomy: Extraterrestrial life
This exercise is about:
- extraterrestrial life;
- super habitable planet;
- exoplanet;
- abiogenesis;
- panspermia;
- number of exoplanets discovered.
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Astronomy: Scientists
This exercise on the history of astronomy covers a range of concepts, a range of scientists and astronomers from the past.
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Astronomy: History
This exercise is about the history of astronomy in ancient times, the Middle Ages, modern times and the present.
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Astronomy: Movement of the moon
This exercise is about, among other things
- movement of the moon;
- mare on the moon;
- phases of the moon;
- sidereal month;
- lunar eclipse;
- solar eclipse;
- tides on earth.
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Astronomy: Movements of the Earth
The following concepts are discussed in this exercise:
- movements of the earth;
- North Star;
- earth's axis and rotation;
- sidereal day;
- solar day;
- meridian of Greenwich;
- time zones on Earth;
- flattening of the earth;
- coriolis factor;
- …
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Astronomy: Concepts 3
This exercise covers the following concepts, among others:
- geographical latitude;
- celestial sphere;
- horizon coordinates;
- obliquity;
- zenith;
- glacial;
- ...
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Astronomy: Concepts 2
Concepts covered in this exercise include:
- supernova,
- hypernova,
- basic geometry,
- sunrise,
- sunset,
- twilight,
- culminating of celestial bodies,
- circumpolar stars.
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Astronomy: Concepts 1
Concepts discussed here are:
- distances to the moon;
- distances in the solar system;
- distances in the nearby universe;
- distances in the entire universe;
- distance modulus;
- Brightness;
- parallax as a measure of distance;
- Kepler's laws.
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Mixed circuit of resistors
This exercise can also be used as a test. It consists of two combined circuits, each with two resistors connected in series/parallel. Voltage, current and resistance must be calculated.
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Cosmography: Dwarf stars
This digital exercise will help you learn more about stars. While completing the multiple choice questions you will learn more about:
- dwarf stars,
- species,
- extraterrestrial life.
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Types of paint
In this learning resource you will see how paint is used as protection, as decoration, as signaling, in painting, and you will be introduced to the important types of paint.
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Rubber
This exercise will include:
- production,
- applications,
- additives,
- rubber allergy,
- natural rubber
- synthetic rubber,
- risk explanation.
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