Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science ST > Material World > Flashcards

Material World Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

bases have a pH of what on the pH scale?

A

7.1-14

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

neutrals have a pH of what on the pH scale

A

7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The charge of an atom is based on what

A

The number of protons and electrons it has

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

is the ion positive or negative if the number of protons is greater than the number of electrons

A

+ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

is the ion positive or negative if the number of electrons is greater than the number of protons

A

-ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

how does an aqueous solution conduct electricity

A

when a compound is added to it, The compound will separate into two separate charges when dissolved in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is needed for combustion

A

heat
fuel
oxidizing agent (usually oxygen)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the equation for combustion

A

CH4+2O2—>2H2O+CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are three reactions of the carbon cycle

A

photosynthesis, respiration, and combustion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the equation for respiration

A

C6H12O6+6O2—>6CO2+6H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the reaction of photosynthesis

A

6CO2+6H2O—>C6H12O6+6O2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are periods on the periodic table

A

The different rows

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what’s common about each element in a period

A

they have same number of electrons shells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what are the groups on the periodic table

A

The different columns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what does each group have in common

A

same number of valence electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

where are noble gases located

A

eighth group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

where are halogens located

A

seventh group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

where are alkaline metals located

A

first group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

where are alkali earth metals located

A

Second group

20
Q

which family is stable

A

Noble gases

21
Q

which families are highly reactive

A

halogens and alkali metals

22
Q

what does the Rutherford-Bohr atomic model show

A

The nucleus with protons only and electrons per shell

23
Q

Protons have a _____ charge

A

positive

24
Q

Electrons have a ______charge

A

negative

25
Q

Neutron have _____ charge

A

no

26
Q

objects with the same charges will _____ each other

A

repel

27
Q

Objects with opposite charges will _____ each other

A

attract

28
Q

what is static electricity

A

it’s the transfer of electrons from one body to another

29
Q

what are the three ways you can conduct static electricity

A

friction, conduction, and induction

30
Q

what is friction

A

two materials rubbing together and their electrons transfer from one and other

31
Q

what is conduction

A

when two materials touch each other and the electrons transfer

32
Q

what’s induction

A

when two materials approach each other and their electrons jump from one material to another

33
Q

what is Ohm’s law

A

V=IR

34
Q

what is a direct current

A

The electrons are flowing in one direction

35
Q

what is an alternating current

A

when the electrons flow back and forth many times per second in a regular pattern

36
Q

what are the two poles in every magnet

A

North and south

37
Q

like poles ____

A

repel

38
Q

opposite poles _____

A

attract

39
Q

what does the thumb do in the left-hand rule of an electromagnet

A

points in the direction of current (negative to positive)

40
Q

what do the fingers do in the left-hand rule

A

they curl in the direction of the magnetic field lines

41
Q

how can you modify the intensity of a magnetic field with an electromagnet

A

The type of wire and the current intensity

42
Q

what is the law of conservation of energy

A

Energy cannot be created nor destroyed; it could only be transformed or transmitted

43
Q

The total amount of energy within a closed system always remains what

A

equal

44
Q

what is the equation for energy efficiency

A

amount of useful energy/amount of energy consumed x100

45
Q

acids have a pH of what on the pH scale?

A

0-6.9

Science ST (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions