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SCI (weeks 1-2)
Inquiry and matter
Question | Answer |
---|---|
an educated guess about an experimental question | hypothesis |
summaries of what was learned in a scientific experiment | conclusions |
unchanged independent variable used for comparison (example: using the same temperature for all the ovens in an experiment) | control |
a part of an experiment that can change | variable |
the kind of variable an experimenter chooses to change | independent |
the first step of any scientific investigation | question |
step by step directions for conducting an experiment | procedure |
when a solid gains heat and turns into a liquid | melting |
;what something is known as if it has both volume and mass (examples: water, iron, plastic, cotton) | matter |
when a liquid gains lots of heat and rapidly turns into a gas | boiling |
the absence of heat | cold |
when liquid loses heat and its atoms come together to form a solid | freezing |
the smallest unit of matter that cannot be divided by chemical means | atom |
a property that describes how easily a substance undergoes chemical changes | reactivity |
the matter of only one type of atom (examples: sodium, potassium, chlorine, oxygen, carbon, etc.) | element |
properties such as color, density, and hardness are known as the _______________ properties of matter | physical |
properties that describe how matter reacts when exposed to other substances or energy are known as the ________________ properties of matter | chemical |
matter that is made of two or more types of atoms combined chemically (examplesL H2O [water], CO2 [carbon dioxide]) | compound |
a kind of chart invented by Dmitri Mendeleev in 1869 is known as the ________________ table | periodic |
A Greek thinker who expressed ideas about the building blocks of matter. | Aristotle |