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Essential Skill Crossword 1-4

Across
Force of attraction between all objects with mass
A solid in which atoms are arranged in a repeating pattern
A reaction to stimulus
The smallest part of an element
Nerve cell that detects stimuli
Transfer of thermal energy by electromagnetic waves
Transfer of thermal energy that requires direct contact
A change greater than a change in state of matter (fireworks exploding)
The smallest part of a compound
Boundary of warmer air mass moving over a cooler denser air (brings rain)
Any change causing a reaction in an organism
Transfer of thermal energy the movement of a fluid
Neutral particle in the nucleus if an atom
Down
The transfer of thermal energy from warmer substance to cooler substances
Warmer than usual pacific ocean current that impacts the global weather patterns
A large body of air with similar temperature and humidity throughout
Positively charged particle in the nucleus of an atom
A change in a substance that is reversible (melting ice)
Nerve cell that carries an impulse to muscles and other organs
Boundary of cooler air mass pushing under a warm air mass (severe weather)
The amount of water vapor in the air
Pure substance made of two or more elements chemically combined in a set ratio
Negatively charged particle that orbits the nucleus of the atom
Pure substance made of only one type of atom
A cell that carries information through the nervous system