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UNIT 1 VOCAB

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