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Questions
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Answers
1
A compound must have 3 or more different elements
False
True
2
A theory is broad principle of nature that has been supported by repeated testing.
True
False
3
There are 2 types of geneous mixtures
False
True
4
What always has a constant composition throughout it?
Homogeneous mixture
None of these
Homogeneous mixture and solution
Solution
5
A positive exponent indicates how many times the coefficient must be multiplied by 10
False
True
6
Percent error = error/accepted value x ?
300%
5%
8%
100%
7
What is a form of matter that has its own definite shape and volume
Solid
liquid
air
a tree
8
An explanation that has been repeatedly supported by many experiments...
Applied research
Hypothesis
Scientific law
Theory
9
Can you break a compound into simpler substances by chemical means?
True
False
10
Which one is not an example of a chemical change?
Decomposing
oxidizing
Vaporizing
Burning
11
What is a graph?
A way to see trends more easily than on a table
A form of science
A visual display of data
A harder way to see data than a table
12
A scientific law is a law made purely to gain knowledge for the sake of knowledge itself
True
False
13
Nonzero integers always count as Significant figures
True
False
14
You multiply number written in scientific notation by multiplying the exponents and adding the coefficints
True
False
15
Is baking soda a compound?
True
False
16
Distillation is a physical separation of homogeneous mixtures
True
False
17
Captive zeros are counted as significant figures
False
True
18
Accuracy is the measurement of how far a measurement comes to the actual.true value of whatever is being measured
False
True
19
A conversion factor is a ration of equivalent values having diff units
True
False
20
There is another name for substance
False
True
21
An experimental value is a quantitative value measured during an experiment
False
True
22
Is flammability a chemical property?
False
True
23
Density is a ration that compares an objects height to its volume
False
True
24
What type of graph is this?
A table graph
A green one
A bar graph
A circle graph
25
A testable explanation of a situation or phenomena is...
A hypothesis
A theory
pure research
a scientific law
26
Chemistry is the study of matter and the changes that it undergoes
True
False
27
What do you call the process in which a solid changes to a vapor without melting is called sublimation
True
False
28
A base unit is defined and independent
True
False
29
Weight is the measurment of Earth's gravitational pull on matter
True
False
30
The capacity to do work or produce heat is energy
False
True
31
What are the states of matter?
Solid, air, fog, liquid
Solid, liquid, gas, vapor, plasma
solid, gas, water, vapor
Solid, liquid, gas, vapor
32
In a periodic table, horizontal rows are called?
Horizontal rows
Periods
Groups
Families
33
No can matter be created and destroyed
False
True
34
Mass/volume is the formula for density
False
True
35
Is light matter?
True
False
36
An exact number is a number that has an infinite number of significant figures
True
False
37
In significant figures, nonzero numbers are always significant
True
False
38
The formula for error is accepted value - experimental value
False
True
39
What is the difference between pure research and applied research?
applied is to gain knowledge, pure is to solve a problem
Pure is to gain knowledge, applied is to solve a problem
Ignore this :)
There are no differences, just two fancy names for the same thing
40
Measurement has a quantity that is?
A number and a unit
A number
None of these
A unit
41
What type of research is making a cure for headaches?
Pure Research
Applied research
mixed research
basic research
42
Ripping is an example of physical change
False
True
43
each element has a unique chemical name and/pr symbol?
False
True
44
Trailing zeros are significant only if the number doesn't have a decimal point
True
False
45
Error is the difference between the experimental value and the accepted value.
True
False
46
Which of the following aren't pure substances?
Tap water
Air
Milk
Table salt
47
An independent variable is a ration that compares an objects mass to its volume
False
True
48
Significant figures include all known units plus one estimated digit.
False
True
49
Density is a physical property of matter defined as the amount of mass per unit volume
True
False
50
What is interpolation and Extrapolation
Interpolation's reading/estimating values falling between points on a graph
Extrapolation is reading lines
Extrapolation is estimating values outside the points by extending the line
Interpolation is estimating values outside the points by extending the line
51
The SI unit of energy is called a Joule
True
False
52
Calculate the density of a ball if its mass is 20 and its volume is 5.
4.5
10
4
100
53
The negative exponent indicates how many times the coefficient must be divided by 10
True
False
54
In 6.02 x 1023, whats the coefficient and the exponent
6.02 is the exponent
6.02 is the coefficient
23 is the exponent
23 is the coefficient
55
A base unit is an undefined/independent unit in a system of measurement based on an object/event in the physical world
False
True
56
Exponents must be the same if you want to add and subtract numbers in scientific notation
True
False
57
A mixture is a combination of 2 or more pure substances (use number, 6)
False
True
58
Dimensional analysis is a systematic approach that uses conversion factors to move/convert from one unit to another
False
True
59
Scientific notation can be used to express any number as a number between 1 and 10
True
False
60
Precision is a measurement of how close measurements are to one another.
False
True
61
A base unit is an undefined unit in a system of measurement based on an object/event in the physical world
True
False
62
What is an example of matter?
Torch light
The sound of a police siren
The stars in the sky
The heat from a fire
63
Is cereal in milk a heterogenous mixture?
No, Because It does not mix evenly.
No, because the cereal and milk mix evenly.
Yes, because the cereal and milk cannot be seperated physically.
Yes, because the milk and cereal can be separated physically.
64
The precision of a measurement is indicated by the number of digits reported
False
True
65
Choose all characteristics of matter
Weight
Chemicals
Mass
Substance
66
The mass of reactants equals the mass of products
True
False
67
What is observation?
Ignore :)
Orderly and direct info gathered about a phenomenon
The same as an hypothesis but ONLY with botanical sciences
Basically a scientific theory, but shorter
68
What is the definition of matter?
Anything with mass that takes up space
Matter and the changes it undergoes
A broad principle of nature
A testable explanation of a situation or phenomena
69
Is seconds an example of one of the 7 base units?
False
True
70
There are 7 base units in SI?
True
False
71
Leading zeros are counted as a significant figure
True
False
72
How would you write 76,000 (Seventy-six thousand) in scientific notation?
7.6 x 103
77.6 × 104
7.6 × 104
7.6 x 105
73
can an element be separated into simpler substances?
False
True
74
Colour is an example that an chemical reaction has taken place
True
False
75
The revised version of the metric system is not the International system of units
True
False
