Spring tides and neap tides.
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Flying fox bat sleeping.
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Structure of the planet Venus.
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The greenhouse effect. #1
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Structure of the Sun.
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Copernican heliocentric system.
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Presence of mercury in the food chain.
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Relationship between photosynthesis and cellular respiration.
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Ground coordinates.
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The greenhouse effect.
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3 Superimposed Orbits Of Periodic Comets On The Orbits Of The Outer Planets Of The Solar System.
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Panda bear with young.
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Psittaciformes birds.
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Classification of invertebrates.
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Layers of the atmosphere.
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Intertropical zone.
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Petrogenetic cycle.
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Space exploration. #2
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Classification of clouds.
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Atmospheric pressure. Pressure decreases with height.
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Animal eukaryotic cell.
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Movements of the heart.
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Classification of galaxies according to Hubble.
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Types of clouds. #1
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Milky Way and solar system.
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Parts of the atmosphere.
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Moon phases. Lunation.
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