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7A Final Review Physical Science
7A Final Review Physical Science
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1
What does this motion graph show?
the velocity is changing and decreases as time passes
the object's velocity is changing as time passes.
velocity stays the same
2
Energy produced by vibrations.
heat energy
sound energy
light energy
decrease
3
What describes motion?
Friction
Newtons
Speed
Force
4
Define chemical changes
Chemical means a new substance is formed
Chemical means a new substance is not formed
5
Energy is ...
the ability to do work
generated
stored energy
able to be destroyed
6
energy can neither be created nor destroyed in chemical and physical changes
magnetic field
medium
mass
law of conservation of energy
7
Energy can be transferred as ___________
heat
All of the above
sound
light
8
The calculation for density is
mass ÷ volume
volume ÷ mass
volume x length
mass x length
9
All of the following are mixtures EXCEPT –
crushed rock and glass
glass marbles in a pile
peanuts and raisins together
iron filings and sand
10
what is the third law of motion
forces in an object
mass
for every action there is an opposite and equal reaction
the sum of all forces
11
If you have two or more different types of atoms bonded together, you have made a ?
big mess
compound
element
explosion
12
Newton's First Law of Motion is also known as
Law of Conservation of Matter
Law of Inertia
Law of Conservation of Momentum
Momentum
13
How many electrons do Hydrogen atoms have?
4
1
2
6
14
Mass is the amount of ----- in an object.
matter
density
volume
15
The manipulated variable in an experiment is...
The dependent variable, the one you change.
The independent variable, the one that changes.
The independent variable, the one you change.
16
How many total atoms are present in this compound?
6
4
2
1
17
Inferences are....
ideas about what may happen in the future
ideas formed by observations and facts, or prior knowledge
using your 5 senses to describe an object
the steps in an experiment
18
Which is N̴̖̈́O̵̗͛T̵̺̎ a unit of measurement in the metric system
Gram
Inch
Meter
Liter
19
Energy can be stored in ____________ .
all of the above
batteries
fuel
food
20
About how long is the line in centimeters?
6 centimeters
7 centimeters
8 centimeters
10 centimeters
21
Most element on the periodic table are ____
metals
gases
nonmetals
22
What is speed?
number of waves that pass a point in a certain time.
The distance between two corresponding parts of a wave.
How far away travels in a given amount of time.
What frequency is measured in
23
what is motion?
the act of changing location from one place to another
acceleration
the sum of all forces acting on an object
the speed of something in a given derection,speed
24
The control in an experiment is
the part of the experiment under normal conditions
the part of the experiment that changes
the effect
25
What unit of measurement does the tripple beam balance measure in?
Grams (g)
Cups
Milliliters (mL)
Pounds (lbs)
26
Chemical changes happen
All of the above
because atoms rearrange and new bonds are formed
because bonds are broken and atoms rearrange
because a chemical reaction occurs
27
Something that is composed of all of the same kind of atoms is called a ?
mess
element
homogeneous mixture
compound
28
The facts, figures,and other evidence gathered through observations are called:
data
hypothesis
predictions
conclusions
29
speed = __________/__________
speed/time
time/distance
distance/time
speed/distance
30
Which of these mixtures could be separated using magnetism?
rice and iron filings
iron nails and steel screws
glass marbles and plastic balls
wooden buttons and ceramic buttons
31
A measurement must include both a number and a(n)
unit of friendliness
unit of measurement
unit ofmass
smile
32
Periods in the periodic table are...
columns
rows
33
The ____________________ is the results of an experiment
independent variable
controlled variable
hypothesis
dependent variable
34
What does this motion graph show?
distance increase as time passes
no motion
a decrease as time passes
35
All are physical changes except...
Melting ice
Eggs cooking
Shredding paper
Dicing Potatoes
36
Mixtures are...
Chemically combined
Physically combined
37
Wind is a renewable energy
True
False
38
Where are the least reactive elements on the periodic table?
Transition Metals
Alkali Metals
Nobel Gasses
Halogens
39
The energy that is stored in an object
Potential energy
Heat
Kinetic energy
Thermal energy
40
The periodic table is arranged _______________.
alphabetically
by increasing atomic #
by increasing atomic mass
41
How are mixtures and solutions the same?
both are types of gasses
both are solids
both are liquids
both are types of matter that contains more than 1 substance
42
What does density tell about an object?
How the length affects the width
How closely packed the particles are in an object
How light an object is
How much space an object takes up
43
How are mixtures and solutions different?
in a mixture one substance is water
in a solution the substances are evenly mixed
in a mixture substances are evenly mixed
in a solution substances are not evenly mixed
44
What is the density of water?
1.0 g/mm
1.0 g/L
1.0 mL/g
1.0 g/mL
45
a force acting in the opposite direction of an object in motion
mood
normal
gravity
friction
46
Which group is the most reactive group on the periodic table?
alkaline earth metals
alkali metals
noble gases
47
What is the volume in the graduated cylinder?
42 mL
46 mL
41 mL
43 mL
48
In an experiment, a constant is
something that stays the same
something that changes
49
Groups on the periodic table are arranged
Horizontally
Vertically
50
Define physical changes
New substance isn't formed
new substance is formed
51
What do solutions consist of?
Substances and Solutes
Solutions and Solvents
Solvent and Solutes
Substances and Particles
52
Energy of motion used to do work.
Electrical Energy
Light Energy
Mechanical Energy
Chemical Energy
