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UNIT 1 VOCAB

Across
the process of learning about the natural world through observation and experimentation.
Measurement of acidity
a substance that is formed as the result of a chemical reaction
two or more atoms joined (or “bonded”) tightly together
attraction between molecules of different substances
a variable that stands alone and isn't changed by the other variables you are trying to measure
a very powerful magnifying glass
a substance that can gain a hydrogen ion when combined with another substance
smallest basic unit of matter
Down
attraction between molecules of the same substance
a group of similar organisms that are able to reproduce
a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts.
something that depends on other factors.
a pure substance that is made from a single type of atom
made up of the interaction of all living organisms (like animals, plants, and bugs) in an area with all of the non-living organisms (like water, dirt, rocks, and the sun).
have particles that create an element called hydrogen, and they can taste sweet, tangy, or tart.
The factors that do not change during the experiment
The study of living things
The substances present at the start of a chemical reaction
the genetic information inside the cells of the body that helps make people who they are