What does temperature measure?

The average kinetic energy of particles

Exper. to determine if sugar dissolves faster in warm or cold water. What is the dep. variable?

The rate at which the sugar dissolves

A quantitative observation for this photo is

Male peacocks have approximately 200 tail feathers

The variable that is changed during an experiment

both a manipulated and independent variable

Which of the following occurs when water is heated?

Its molecules move at a faster rate

Which of the following processes is an example of condensation?

Nitrogen gas changing to liquid nitrogen

Which of the following statements is true of elements in the same row of the periodic table?

They have the same number of electron shells

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You Be the Chemist!

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Questions 77

Answers

1
When two or more atoms interact with one another, they may form a larger unit called a(n)
element
formula
molecule
isotope
2
What does temperature measure?
The average kinetic energy of particles
The amount of matter in an objec
The amount of force per unit area
The ability to do work or generate heat
3
Who developed the atomic theory of matter
John Dalton
Issac Newton
Niels Bohr
John Travolta
4
Exper. to determine if sugar dissolves faster in warm or cold water. What is the dep. variable?
The rate at which the sugar dissolves
The brand of sugar used
The temperature of the water
The amount of water in the cups
5
a pure substance made up of two or more elements joined in a defined ratio.
compound
mixture
solution
reaction
6
Which of the following are NOT commonly use the following units to measure pressure
psi
grams
atmospheres
Pascals ( pa)
7
A quantitative observation for this photo is
The head and neck is iridescent shade of bright blue.
The peacock is ready to mate
The call of the peacock is quite distinctive
Male peacocks have approximately 200 tail feathers
8
Which element has 10 stable isotopes—the largest number of stable isotopes of any element
oxyten ( O2)
nitrogen (N)
Boron (B)
Tin (Sn)
9
colloids made of fine solid particles in a liquid or another solid.
foams
gels
Emulsions
sols
10
Which is an allotrop of carbon?
fossiles
graphite
smoke
carbon dioxide
11
The strength of gravity’s pull on an object depends on distance and
volume
mass
force
density
12
The derived unit for force is
a joule
a pascale
a newton
volt
13
A measure of the pull of gravity between an object and the earth (or the planets, sun, etc.).
force
velocity
weight
volume
14
Which of the following statements is true of liquids?
They have a defined shape
none of the above
They have both a defined volume and shape
They have a defined volume
15
scientist who showed that burning hydrogen produced water
Henry Cavendish
John Dalton
Neils Bohr
Antoine Lavoisier
16
Scientists state clearly what they plan to test during their experiment. This statement is
an experiment
an inference
a scientific theory
a hypothesis
17
standard unit for measuring length.
kelvin
kilogram
meter
Milliliter
18
Scientists measure mass in
cubic centimeters (cm3)
kilograms (kg)
grams (g)
both grams and kilograms
19
An atom with 8 electrons is
positive
negative
unstable
stable
20
Scientific inquiry usually begins with
a question
an idea
an observation
a theory
21
Micro is represented by
(0.000000001)
(1)
(0.000001)
(0.001)
22
a change of state from a gas to a liquid
effusion
evaporation
condensation
precipitation
23
Which represents a Giga?
(1,000)
(1,000,000,000)
(1,000,000,000,000)
(1,000,000,000,000)
24
Will water at different temps will freeze at different rates? What is the dep. variable?
time
the water
the freezer
the temperature of the water
25
What is the most common element in earth's crust?
nitrogen
oxygen
hydrogen
both oxygen and nitrogen
26
Positively charged ions are called
cations
antlions
anions
isotopes
27
Which item is insoluble in water?
lipids
sugar
ethanol
salt
28
description of a natural event or phenomenon shown to occur repeatedly under same conditions
theory
observation
law
data set
29
the amount of push or pull on an object.
velocity
force
torque
acceleration
30
Term for an atom that arranges itself in different ways to form different properties
chemical bond
isotope
allotrope
element
31
How is a mile written in scientific notation?
5280 x 1 3 ft
52.8 x 10 3 ft
5.28 × 1,000 ft
5.28 × 10 3 ft
32
a uniform substance made up of one type of particle, can be either an element or a compound.
solid
matter
pure substance
solution
33
Water has a very high surface tension because of strong
effusion
nitrogen bonding
density
hydrogen bonding
34
Which substance is most viscous?
honey
saladdressing
water
grape juice
35
the movement of gas particles through a small hole from an area of high pressure to area of low
emulsion
molecular mass
viscosity
Effusion
36
a statement that tells whether or not the hypothesis was correct.
hypothesis
a conclusion
scientific law
analysis
37
Look at the image for question.
Deposition
The Tyndall effect
A chemical reaction
A phase change
38
Straining pasta in a colander is an example of
diffusion
filtration
none of the answers
endothermic change
39
The variable that is changed during an experiment
independent variable
dependent variable
both a manipulated and independent variable
manipulated variable
40
the diffusion of water across a semi-permeable membrane
osmosis
effusion
flow
metamorphosis
41
This helps you understand what happens when you don’t make any changes during an experiment
None of the answers are true
control
independent variable
dependent variable
42
Which is not a gel?
soft cheese
whipped cream
butter
jelly
43
The derived unit for power is
hertz
Watt
Ohm
volt
44
a measure of the size of a surface
density
area
none of the answers
volume
45
Pieces of information collected before, during, and after an experiment
interviews
investigation
research
data
46
Which of the following occurs when water is heated?
Its molecules move at a faster rate
ts molecules become more attracted to one another
Its molecules form a crystalline structure
It dissociates into oxygen and hydrogen B
47
Which of the following processes is an example of condensation?
Hydrochloric acid changing to hydrogen chloride gas
Water vapor changing to ice
Dry ice changing to gaseous carbon dioxide
Nitrogen gas changing to liquid nitrogen
48
Which is NOT a homogeneous mixture?
blood
kool-aid
Pepsi
water
49
Which of the following statements is true of elements in the same row of the periodic table?
They do not react with one another
They tend to participate in the same types of reactions
They have the same number of electron shells
They have the same number of electrons in their outer shell
50
When temperature decreases, the substance becomes denser. What is an exception to this rule?
water
air
gas
none of the answers
51
What are examples of pure substances?
both water and carbon dioxide
carbon dioxide
pure water
air
52
Anions are
neutral
positively charged
negatively charged
only found in the nucleus
53
measure of the quantity of material in a substance and affects speed or direction of motion. •
density
volume
mass
distance
54
the lightest and most abundant element in the universe
helium
nitrogen
hydrogen
oxygen
55
Air pressure on earth ___ the higher you travel in the mountains
increases
evaporates
stays the same
decreases
56
a mixture in which minute particles are spread evenly throughout another substance.
alloid
Colloid
alloy
foams
57
A balloon filled with helium gas will deflate over time as a result of
effusion
osmosis
none of the answers is correct
diffusion
58
Light is an example of
chemical energy
kinetic energy
electromagnetic energy
thermal energy
59
Which is NOT a compound?
C6H12O6 glucose
H20 water
H Hydrogen
H2SO4 Sulfuric acid
60
F= m X a Pick the best answer
You want to find the mass of a baseball
the amount of force exerted on a person underwater
You want to find the volume of a cube
You want to know how much force is needed for a toy to move
61
a pure substance that cannot be broken down by normal chemical or physical means
solution
element
compound
mixture
62
the amount of force exerted per unit area
both force and pressure
pressure
force
gravity
63
Which is a qualitative observation?
There are 4 quarters minted between 1935 and 1964
The quarters appear to be worn down
The quarters amount to $1.00
both 4 quarters and amount answers are correct
64
A compound made of two different elements is called a
bicential compound
duo compound
binary compound
ternary compound
65
When salt is dissolved in water, salt is the
solute
solution
solvent
both solute and solution
66
an explanation of an event or phenomenon that is well supported by data and explain why
facts
theory
law
data
67
What charge is an electron?
positive
both positive and negative
negative
neutral
68
often have a cloudy appearance
Aerosols
Foams
gels
Emulsions
69
Mass is usually measured with a
balance or balance scale
Ruler
graduated cylinder
beaker
70
What is that describes the inability for these liquids to mix?
unmixable
viscocity
solubility
immiscible
71
If atoms do not have the same number of protons and electrons, they are called
isotopes
ions
neutrons
elements
72
In which of the following situations does a 2 kg ball have the greatest potential energy?
Halfway through a fall from a height of 2 m
Both at the start from 2m and halfway from 4m
At the start of a fall from a height of 2 m
Halfway through a fall from a height of 4 m
73
500,000,000 m/s written in scientific notation
5 x 800,000,000 m/s
none of these answers
5 x 10 5
5 × 10 8 m/s
74
What do scientists measure with this instrument?
pressure
wind
precipitation
force
75
Which of the following changes in temperature is equivalent to a 10 °C increase?
A 12 °F increase
An 18 °F increase
A 10 °F increase
A 50 °F increase
76
1 centimeter equals
100 millimeters
10 millimeters
20 millimeters
1 milligram
77
Where and when was the metric system developed?
Brittan in the 1790s
Russia in the 1700s
France in the 1790s
Germany in the 1800s

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