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T3 exams > Science > Flashcards

Science Flashcards

0
Q

Any chemical change that causes a material to be worn away

A

Corrosion

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1
Q

A chemical change or _______ that takes ease on the atomic level and produces a new substance

A

Chemical reaction

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2
Q

A form of oxidation and corrosion of iron and iron alloys. These undergo chemical reaction when exposed to water and oxygen

A

Rusting

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3
Q

A characteristic of a substance that is observed when it undergoes a chemical change

A

Chemical property

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5
Q

Bonds that are formed when atoms

share electrons. Carbon dioxide is a molecule created by two of these bonds

A

Covalent bonds

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6
Q

The temperature at which a substance changes from the liquid phase to the gas phase.

A

Boiling point

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9
Q

Substances that are made up of only one kind of atom. They cannot be broken down by chemical reactions.

A

Elements

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10
Q

A chart that organizes the known elements by their properties

A

Periodic table of elements

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11
Q

This states that matter cannot be created or destroyed in a chemical
Change; it can only change forms, and the same overall amount if matter is present before and after the chemical change

A

Conservation of matter

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13
Q

The amount of matter (stuff) within a substance or an object. The tool used to measure ______ is the balance scale and the units of measure used for mass are milligrams and grams

A

Mass

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14
Q

This is the temperature at which a substance changes from a solid phase to the liquid phase. This is the same as another point at which a substance changes from a liquid to a solid

A

Melting point/freezing point

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15
Q

The amount of mass of a substance in a specific volume, calculated by mass divided by volume

A

Density

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16
Q

A change that changes the size or shape of a substance, but the physical properties and substance remain the same

A

Physical change

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17
Q

Made up of substances that remain the same substance; they can be separated into their original parts and keep their original properties. Example: salt water can be separated into salt and water

A

Mixture

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18
Q

Attributes of a substance that can be observed or measured that helps to define or identify the substance. These properties include density, melting point, color, texture, shape, size, and solubility.

A

Physical properties

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19
Q

Anything that has mass and volume

A

Matter

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20
Q

The new substance or substances formed in a chemical reaction

A

Products

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21
Q

The starting substance or substances in a chemical reaction

A

Reactants

22
Q

The ability of a substance to dissolve in water. This is a characteristic property of substances

A

Solubility

23
Q

A measure of the average kinetic energy of molecules

A

Temperature

24
Q

The amount of space taken up by a substance or an object,

Regardless of it’s shape. It is measured in units of milliliters (mL) and liter (L).

A

Volume

27
Q

What is the formula to calculate density?

A

Density= mass divided by volume

28
Q

Predictable, common patters of air movement due to differences in temperature. Air currents move from cool, high pressure areas to warmer, low-pressure areas

A

Air currents

30
Q

Bonds that are formed when an atom gives electrons to another atom. Sodium chloride (salt, NaCL) is a compound created by these bonds

A

Ionic bonds

33
Q

____ are made up of different kinds of elements; the elements that make up the ____ form a new substance with different properties

A

Compounds

34
Q

The scale used to measure the strength of an acid of a base

A

The pH scale

35
Q

On the universal pH scale, numbers 4,5,&6 (red, orange and yellow) represent what?

A

Acids

36
Q

On the universal pH scale, the number 7, (light green) represents what?

A

Neutral

37
Q

On the universal pH scale, numbers 8,9,&10 (dark green, blue and purple) represent what?

A

Bases

38
Q

How can you tell if two tonka trucks are made of the same metal?

A

-Density, everything has their own density

39
Q

I pour kool aid mix in water; what happens to the particles of kool aid?

A

Dissolve

40
Q

How many atoms
Of each type of element are in this compound?

C6 H12 O6

A

6 carbon, 12 hydrogen, and 6 oxygen

41
Q

You leave your garden rake outside. What causes it to rust?

A

Iron combining with oxygen

42
Q

Why are element considered to be the building blocks of matter?

A

Everything is made up of one or more atoms (elements)

43
Q

What does an elements location on the periodic table tell us?

A

-it’s properties

44
Q

How are elements different than compounds?

A

Elements are made up of only 1 type of atom. Compounds are made up of more than one type of atom

45
Q

Productions of a gas, color change, or texture change is a…..

A

-chemical change

46
Q

Why are atoms neutrally

Charged?

A

Protons and electrons balance each other out for neutrons

47
Q

What does the law of conservation of matter tell us?

A

In a chemical reaction no matter is created or destroyed

48
Q

What will I find in the nucleus of an atom?

A

Protons and neutrons

49
Q

When a positively charged atom bonds with a negatively charged atom what type of bonding it it?

A

Ionic bond

50
Q

What is A combination of two or more substances that retain their identity?

A

Mixture

51
Q

When two atoms share electrons if it is a _______ bond?

A

Covalent

52
Q

Which end of the pH scale would you find a lemon?

A

Acid (0-6)

Bases are above 7 and a neutral is a 7

T3 exams (5 decks)

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