Brainscape's Knowledge GenomeTM

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


See full index

1st SEMESTER EXAMS > SCIENCE > Flashcards

SCIENCE Flashcards

0
Q

What is the most important lab rule?

A

Always follow your teachers directions exactly

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

What are the main areas of physical science?

A

physics and chemistry

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

What are the different ways that scientists can communicate results?

A

by publishing articles in scientific journals,
giving talks at conferences,
by exchanging emails about the progress in their work

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

What is a compound?

A

compounds- a substance made from 2 or more simpler substances and can be broken down into those simpler substances

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

What is an element?

A

element- a substance that cannot be broken down into simpler substances

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

What is a solution?

A

substances that dissolve and form a homogeneous mixture

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

What is a suspension?

A

a heterogeneous mixture that separates into layers over time

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

What is a colloid?

A

a mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension

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

What is a chemical change?

A

any ability to produce a change in the composition of matter

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

What is a physical change?

A

when the properties of a material changes while the substances stay the same

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

Describe a gas.

A

It has neither a definite shape or volume

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

What happens to the pressure when the number of particles increases?

A

it will increase

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

What happens to the temperature of water when it changes states?

A

it remains the same

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

What are 6 common phases that most liquids can go through?

A 
sublimation,
deposition,
vaporization,
condensation,
melting,
freezing
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What happens during sublimation?

A

a solid turns into a gas

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

What happens during deposition?

A

a gas turns into a solid

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

What happens in condensation?

A

a gas becomes a liquid

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

What happens in vaporization?

A

a liquid turns into a gas

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

What happens in melting?

A

a solid becomes a liquid

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

What happens in freezing?

A

a liquid becomes a solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What was Dalton’s theory?

A

all atoms are made up of individual particles which cannot be divided

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What charge does a proton have?

A

positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What charge does a neutron have?

A

neutral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What charge does an electron have?

A

negative

24
Q

What is an electron cloud model used for?

A

used to describe the possible locations of electrons in an atom

25
Q

What is the atomic mass unit?

A

one twelfth the mass of a carbon-12 atom

26
Q

The most reactive metals are located where on the periodic table?

A

left side

27
Q

What is a valence electron?

A

an electron at its highest occupied energy level of an atom

28
Q

What happens to the number of valence electrons from left to right on the periodic table?

A

it increases

29
Q

Why do atoms gain and loose electrons?

A

to gain stability

30
Q

What is a molecule?

A

a neutral group of atoms that are joined together by one or more covalent bonds

31
Q

Electrons are free to move in a what?

A

metal lattice

32
Q

What does redox stand for?

A

oxidation reduction reaction

33
Q

What does OIL RIG stand for?

A 
Oxidation
Is
Losing
Reduction
Is
Gaining
34
Q

What is an equilibrium?

A

A state in which the forward and reverse paths of a physical or chemical change takes place at the same rate.

35
Q

What is a line graph used for?

A

Show change over time.

36
Q

What is distillation?

A

A process that separates the substance in the solution based on their boiling point.

37
Q

Why am i a doofus?

A

Because i can not brain today i has the dumbs

38
Q

What does Charles law state?

A

The volume of a gas is directly proportional to its temperature if the pressure and the number of particles are constant.

39
Q

What does Boyle’s Law state?

A

The volume of a gas is inversely proportionate to its pressure if the temperature and number of particles are constant.

40
Q

What Aristotle’s thoughts on matter?

A

he believed that all substances were built up from 4 elements-fire, earth, water, and air

41
Q

What did Bohr’s model focus on?

A

electrons

42
Q

How do electrons move in Bohr’s model?

A

in spheric orbits at fixed distances from the nucleus

43
Q

What is an alkali metal (with regards to reactivity?

A

has a single valence electron and is extremely reactive

44
Q

What is an alkaline metal with regards to reactivity?

A

has 2 valence electrons

45
Q

What is the difference between an alkali metal and an alkaline metal in regards to reactivity?

A

the way they react with water

46
Q

What is a polyatomic ion?

A

a covalently bonded group of atoms that has a positive or negative charge and acts as a unit

47
Q

What does the law of conservation of mass state?

A

mass is neither created or destroyed in a chemical reaction

48
Q

What is the freezing point of water in Fahrenheit?

A

32 degrees

49
Q

What is the freezing point of water in Celsius?

A

0 degrees

50
Q

What is the freezing point of water in Kelvins?

A

273 degrees

51
Q

What is the boiling point of water in Fahrenheit?

A

212 degrees

52
Q

What is the boiling point of water in Celsius?

A

100 degrees

53
Q

What is the boiling point of water in Kelvin?

A

373 degrees

54
Q

What are 3 clues that a chemical change has occurred?

A

a change in color,
a production of a gas,
a formation of a precipitate

55
Q

Why is the volume of a liquid more constant than a gas?

A

the bonds have a stronger attraction

56
Q

What did Democritus think about matter?

A

all matter consisted of extremely small particles that cannot be divided

57
Q

What did J.J. Thompson discover?

A

that atoms are made of even smaller particles

1st SEMESTER EXAMS (4 decks)

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