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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 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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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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Natural coloring agents
A natural dye is a dye derived from plants, mushrooms or animals. They can be used for dyeing wool, textiles, hair and food. In this exercise you will become acquainted with different species and their origins. You will also see the link with E …
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Types of ink
In this exercise about ink, you will be introduced to different types and applications. It is also studied as a mixture.
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Glass as raw material
In this exercise about the raw material glass, the glass factory, types of glass, glass manufacturing, etc. are discussed.
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