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    How do animals find food?
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    5.4   | 
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    How do Animals Move?
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    5.3   | 
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    How do baby animals learn?
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    4.0   | 
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    How does it feel?
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    How does it look?
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    How does it move?
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    How Does Sound Change?
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    4.0   | 
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    How Do Insects Move?
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    3.8   | 
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    How Do Insects Protect Themselves?
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    3.8   | 
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    How Do Insects Work Together?
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    4.1   | 
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    How do living things find food?
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    3.3   | 
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    How do plants survive?
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    3.3   | 
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    How do we know it is fall?
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    How do we know it is spring?
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    How do we know it is summer?
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    How do we know it is winter?
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    How do we measure matter?
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    4.8   | 
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    How to Choose Foods Your Body Will Use
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    4.2   | 
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    How to Reduce your Carbon Footprint
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    7.4   | 
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    Human Body Systems
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       | 
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    Humans in Space (4 titles)
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       | 
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    Hydroelectric Power: Power from Moving Water
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    7.5   | 
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    Hydrogen: Running on Water
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    7.8   | 
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    I am a living thing
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    2.8   | 
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