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Science 7 > 1st Qtr > Flashcards

1st Qtr Flashcards

1
Q

conclusion reached on the basis of evidence and reasoning

A

inference

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2
Q

OCIC

A

observing, classifying, inferencing, and communicating (4 science process skills)

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3
Q

A variable that intentionally changed in an expirement.

A

independent variable

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4
Q

A variable that may change as a result of changes made in the independent variable

A

dependent variable

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5
Q

A variable that the research has constant control over.

A

controlled variable

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6
Q

What is the purpose of the scientific method?

A

It is a way of solving problems

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7
Q

What are the factors in an experiment that can be changed?

A

variables

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8
Q

ITP, FH,TTH, GAPD, AD, DC

A

identifying the problem, formulating hypothesis, testing the hypothesis, gathering and presenting data, analysing data, and drawing conclusions (6 steps in the scientific method)

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9
Q

Forms of matter that have a definite and unchanging chemical composition.Ex: salt, baking soda, water

A

pure substances

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10
Q

simplest form of matter made with 1 kind of atom and cannot be changed into another form of matter by ordinary means.

A

element

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11
Q

how many elements are there?

A

118 elements in total

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12
Q

Good Conductors of heat and electricity. Are hard, shiny solids.They are malleable so they can stretch and shaped.

A

metals

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13
Q

Poor conductors of heat and electricity.They are neither malleable nor ductile.

A

non-metals

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14
Q

a substance consisting of atoms or ions of two or more elements that are chemically bonded together ex: paper, nail polish, candle

A

compound

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15
Q

A type of compound that contains carbon, usually bonded to hydrogen. Ex: DNA, Sugar

A

organic compounds

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16
Q

A type of compound that usually doesn’t contain carbon and includes carbon dioxide and some carbohydrates, cyanides, and carbides.

A

inorganic compounds

17
Q

Made up of two or more substances that are physically combined and has 2 types.

A

mixtures

18
Q

It is only have one phase.
It has the same properties and composition. Ex: milk, honey, medicine, tea

A

homogenous mixture

19
Q

It is made up of more than one phase. Different components are visibly distinguishable from one another. Ex: ice cream with toppings, salad

A

heterogenous mixture

20
Q

a homogenous mixture of two or more substances in relative amounts that can be varied continuously up to what is called the limit of solubility.

A

solution

21
Q

a heterogenous mixture in which particles of a material are dispersed throughout a liquid or gas but large enough settle out.

A

suspension

22
Q

a heterogenous mixture of two or more substances mixed together but not chemically combined (they can be separated).

A

colloid

23
Q

takes advantage of the physical property of magnetism.(often by hand) takes advantage of physical properties such as color and shape.

A

Magnetic sepertaion

24
Q

takes advantage of the physical property of the stateofmatter. A screen lets the liquid particles through,but traps the solid particles.

A

filtration

25
Q

can be used to separate solid particles of different sizes.

A

filter

26
Q

The separation o fa mixture of liquids based on the physical property of boiling point.

A

distillation

27
Q

Vaporizing a liquid and leaving the dissolved solid(s)behind. Used to separate salt solutions.

A

evaporation

28
Q

Uses the property of molecular attraction (molecular polarity) to separate a mixture.

A

paper chromatography

29
Q

Dissolved substances crystalize out of a solution once their solubility limit is reached as the solution cools.

A

Fractional Crystallization:

30
Q

Temperature at which a liquid starts to boil

A

boiling point

31
Q

Temperature at which a solid start to melt

A

melting point

32
Q

Temperature at which a liquid changes to a solid

A

freezing point

Science 7 (6 decks)

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