11 answer guides
Science, Nature & the Living World
Animals, plants, anatomy, chemistry, astronomy, technology, and natural-world categories. Each guide labels its editing status and explains the clue connections.
How to test this connection
Separate membership from mechanism: animal names form a set, while body parts describe a system. Check any scientific detail against a reference instead of treating a familiar-sounding phrase as proof.
A common wrong turn
A broader category may be needed when the final clue is not the same kind of object as the first two. Also avoid claiming that a clue identifies only one possible scientific object.
A worked comparison
In #861, crust and mantle suggest layers. Tectonic plates and magnetic poles broaden the answer to parts or features of Earth; neither is simply another internal layer.
Read the example and its clue evidence →Different definitions of “plant”
Factory · Inside agent · Introduce subtly, as an idea · Tree or shrub · Put seeds in the ground
Read evidence →Parts of the Earth
Crust · Mantle · Core (mostly iron and nickel) · Tectonic plates · Magnetic poles (North+South)
Read evidence →Things that are composted
Cardboard · Leaves · Banana peels · Eggshells and egg cartons · Grass clippings and twigs
Read evidence →Types of monkeys
Drill · Marmoset · Capuchin · Macaque · Baboon
Read evidence →Biological taxonomy (ways to classify living things)
Class · Order · Family · Genus · Species
Read evidence →Names of chemical elements
Lead · Iron · Silicon · Carbon · Oxygen
Read evidence →Names of insects
Fly · Cricket · June beetle · Praying mantis · Lightning bug
Read evidence →Things that grow on trees
Apples · Chestnuts · Moss · Bark · Pine needles
Read evidence →Moons in our solar system
Titan · Triton · Phobos · Io · Ganymede (seen by Galileo)
Read evidence →Types of owl
Barn · Snowy · Screech · Great Horned · Hoot (named like its sound)
Read evidence →Things found in a chemistry laboratory
Scale · Beaker · pH meter · Test tube · Bunsen burner
Read evidence →