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Biblioteka

Unit1 Test

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Posljednje ažuriranje almost 6 years ago
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Pitanje 1
1.

Drag the term to the correct sentence or definition.

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

chemical reactions

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Properties that can be observed without changing the chemical composition of the sample of matter

exact numbers

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Describes an occurrence that has been tested under different conditions over a long period of time

weight

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The components of this mixture can be easily seen with the naked eye and are distinguishable

chemistry

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Anything that has mass and volume

matter

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Elements and compounds are classified as this

heterogeneous

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Chemical changes are also known as _____.

hypothesis

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Have an infinite number of significant figures

accuracy

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A ____ serves as a possible explanation to a problem.

physical properties

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Solid, liquid, and gas are the three _____ of matter.

blended

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_____ measurements are descriptive and non-numeric.

law

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______ is the study of matter and the changes it undergoes.

states

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_____ is the amount of matter in an object.

mass

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Unlike compounds that are bonded together, mixtures are ______ together.

pure substances

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The force of gravity pushing down on an object accounts for the object’s _____.

qualitative

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How close multiple measurements are to the accepted value is known as ____.

Pitanje 2
2.

Drag the following the descriptions to the correct label of physical or chemical property.

  • alcohols are flammable

  • a density of 3g/mL

  • boils at 100°C

  • decomposes in CO2

  • attracted to the south pole of a magnet

  • a gas has a volume of 22.4L

  • physical property

  • chemical property

Pitanje 3
3.

Drag the following descriptions to either chemical or physical change.

  • melting ice

  • burning popcorn

  • digesting food

  • molding clay

  • rust forming on a car

  • dissolving salt

  • chemical change

  • physical change

Pitanje 4
4.

Describe the following as either heterogeneous, homogeneous, element, or compound by dragging them to the correct label.

  • Salt water

  • Pizza

  • Oil + Water

  • Zinc

  • tossed salad

  • Carbon dioxide

  • Salad

  • Milk

  • heterogeneous mixtures

  • homogeneous mixture

  • element

  • compound

Pitanje 5
5.

Drag the descriptions to the correct property. Some may be used more than once.

  • can be easily compressed

  • most tightly packed form of matter

  • indefinite shape

  • indefinite volume

  • solid

  • liquid

  • gas

Pitanje 6
6.

How many sig figs does this number have?

Pitanje 7
7.

How many sig figs does this number have?

Pitanje 8
8.

Write this number in the correct scientific notation.

Pitanje 9
9.

Write this number in the correct scientifc notation.

Pitanje 10
10.

Perform the following calculations and round your answers to the correct number of significant figures and/or decimal points. Answers may be in either long form or scientific notation.

Pitanje 11
11.

Perform the following calculations and round your answers to the correct number of significant figures and/or decimal points. Answers may be in either long form or scientific notation.

Pitanje 12
12.

Perform the following calculations and round your answers to the correct number of significant figures and/or decimal points. Answers may be in either long form or scientific notation.

Pitanje 13
13.

Perform the following calculations and round your answers to the correct number of significant figures and/or decimal points. Answers may be in either long form or scientific notation.

Pitanje 14
14.

Perform the following calculations and round your answers to the correct number of significant figures and/or decimal points. Answers may be in either long form or scientific notation.

Pitanje 15
15.

Perform the following calculations and round your answers to the correct number of significant figures and/or decimal points. Answers may be in either long form or scientific notation.