Free online crossword

General Science Knowledge

Medium15×1523 words

Free to play. No signup needed.

Clues in this puzzle

The fundamental structural and functional unit of all living organisms (4)
The molecule that carries genetic instructions in all living things (3)
A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes (10)
A submicroscopic infectious agent that replicates only inside the living cells of an organism (5)
Molten rock that breaks through the Earth's surface (4)
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water (14)
A unit of heredity that is transferred from a parent to offspring (4)
A nucleic acid present in all living cells that acts as a messenger carrying instructions from DNA (3)
A triatomic molecule consisting of three oxygen atoms (5)
A substance that can accept hydrogen ions or more generally, donate electron pairs (4)
A pure substance consisting only of atoms that all have the same number of protons (7)

A device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation (5)
A chemical substance that neutralizes alkalis and turns litmus paper red (4)
A natural phenomenon by which all things with mass or energy are brought toward one another (7)
An alteration in the nucleic acid sequence of the genome of an organism (8)
An astronomical event that occurs when an astronomical object or spacecraft is temporarily obscured (7)
A combustible black rock consisting mainly of carbonized plant matter (4)
A result obtained by dividing one quantity by another (8)
A solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon (9)
An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses (9)
A band of colors, as seen in a rainbow, produced by separation of the components of light (8)
The liquid in which a solute is dissolved to form a solution (7)
A system for detecting the presence, direction, or speed of aircraft and other objects using radio waves (5)