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Science > Grade 6 Chapter 6 > Flashcards

Grade 6 Chapter 6 Flashcards

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0
Q

The measure of the pull of gravity on an object

A

Weight

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1
Q

Anything that takes up space and has mass

A

Matter

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2
Q

The amount of matter that makes up an object

A

Mass

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3
Q

The amount of matter in one unit of volume

A

Density

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4
Q

The tiny particles of which all matter is composed

A

Atoms

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5
Q

The tiny, extremely dense core at the center of an atom

A

Nucleus

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6
Q

The tiny particles that swarm at tremendous speed around the core of an atom

A

Electrons

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7
Q

The metric unit that is used to measure an object’s mass

A

Gram or kilogram

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8
Q

The two particles that make up the nucleus of an atom

A

Proton and neutron

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9
Q

Most metals are solid liquid or gas?

A

Solid

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10
Q

The densest of everyday metals

A

Lead

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11
Q

The semi metal used to make computer chips

A

Silicon

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12
Q

The only metal that is liquid at room temperature

A

Mercury

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13
Q

The element that is the basic building block of all compounds

A

Carbon

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14
Q

A very hard metal which is an important ingredient in stainless steel

A

Nickel

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15
Q

The halogen that is added to toothpaste and drinking water

A

Fluorine

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16
Q

The halogen that is useful as a bleach and germ killing agent

A

Chlorine

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17
Q

The halogen that is added to table salt to prevent a deficiency disease

A

Iodine

18
Q

The colorless odorless gas that makes up 78% of the Earth’s atmosphere

A

Nitrogen

19
Q

Highly reactive elements that tend to form compounds with alkali and alkaline earth metals

A

Halogens

20
Q

The simplest kind of atom with one proton and one electron

A

Hydrogen

21
Q

Formed by electrons that are in orbit the same distance from the nucleus

A

Shell

22
Q

The number of protons an atom has

A

Atomic number

23
Q

Formed by electrons zooming around the nucleus of an atom

A

Electron cloud

24
Q

Lacking an electrical charge

A

Neutral

25
Q

The most abundant element at the surface of the earth

A

Oxygen

26
Q

The study of what substances are made of and how one substance can be changed into another

A

Chemistry

27
Q

The organized arrangement of all known elements

A

The periodic table of the elements

28
Q

The elements which do not combine with anything else except under unusual circumstances

A

Noble gases

29
Q

Two or more atoms firmly bound together form this

A

A molecule

30
Q

Iodine when heated does not melt but does this, meaning it turns into a gas

A

Sublimes

31
Q

The proton has this kind of charge

A

Positive

32
Q

A neutral atom has an equal number of these

A

Protons and electrons

33
Q

Two electrons do this to each other

A

Repel

34
Q

This is a substance that is composed of only one type of atom

A

An element

35
Q

This is a substance composed of one or more types of atoms bonded together

A

A compound

36
Q

If two objects have the same volume but different densities, the object made of the denser substance is what?

A

Heavier and weighs more

37
Q

Does the weight or mass of an object change from place to place?

A

The weight

38
Q

Name the three main groups of elements

A

Metals
nonmetals
semi-metals

39
Q

A compound made of molecules

A

A molecular compound

40
Q

The rapid reaction of any substance with oxygen

A

Combustion

41
Q

A compound made of charged atoms

A

An I onic compound

42
Q

The hardest of all known substances

A

Diamond

43
Q

A process in which atoms of elements or compounds are rearranged to form new substances

A

A chemical reaction

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