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Science 7th Grade > Matter 1 > Flashcards

Matter 1 Flashcards

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1
Q

What is matter?

A

anything that takes up space and has mass.

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2
Q

What is matter MADE of?

A

atoms and molecules

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3
Q

What are some EXAMPLES of matter?

A

food, animals, clouds, soccer balls

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4
Q

What is chemistry?

A

the study of the properties of matter and how matter changes

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5
Q

What is physical properties?

A

how it looks, how it feels, how it smells, how it sounds, what it does

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6
Q

What are chemical properties?

A

they tell whether or not an atom will combine

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7
Q

What are some physical changes?

A

a charecteristic that can be solid, liquid, gas, mixing, or solution

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8
Q

What are chemical changes?

A

when you make something new and you can’t undo it

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9
Q

How many elements make up the matter of the universe?

A

about 100

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10
Q

What is an element?

A

a pure substance that cannot be broken down into anything smaller

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11
Q

What is the smallest piece of matter called?

A

atom

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12
Q

How many different types of atom make up an element?

A

1

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13
Q

What is formed when atoms combine by joining electrons?

A

a molecule

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14
Q

What is a compound?

A

elements combine in a fixed ratio to make a compound

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15
Q

Is a compound’s properties different than the elements that make it up?

A

yes

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16
Q

What is a fixed ratio?

A

a chemical formula

17
Q

What is a mixture?

A

something that is together but has not been chemically combined

18
Q

What are the two types of mixtures?

A

heterogeneous and homogeneous

19
Q

What are heterogeneous mixtures?

A

when you can see the different parts

20
Q

What are homogeneous mixtures?

A

when you cannot see the different parts

21
Q

Where do you find electrons in an atom?

A

in the electron orbit

22
Q

Are electrons charged positively or negatively?

A

negatively

23
Q

Where do you find protons and neutrons?

A

in the nucleas

24
Q

What charge are protons?

A

positive

25
Q

What charge are neutrons?

A

no charge

26
Q

What do scientists define matter as?

A

anything that has weight and take s up space

27
Q

What is an example of abstract?

A

a dream

28
Q

Does matter contain energy and can be converted from one form to another?

A

yes

29
Q

What is a physical change?

A

an alteration in the form of matter but not in it’s composition. like solid to liquid.

30
Q

What is a chemical change?

A

when one type of matter is converted into another, like how iron rusts.

Science 7th Grade (11 decks)

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