Worksheets7th grade 1st Semester Exam Study Guide for Science
Total questions: 99
Worksheet time: 50mins
Name
Class
Date
1.
Put the steps of the scientific method In order from first to last.
a)
Recognize a problem,form a hypothesis, test hypothesis, analyze data, draw conclusions,communicate
b)
Form a hypothesis, test hypothesis, recognize a problem, communicate
c)
Recognize a problem, communicate, form a hypothesis, test the hypothesis, analyze data, draw conclusion
d)
A. Communicate,recognize a problem,form a hypothesis, analyze data, test hypothesis,draw conclusions·
2.
In an experiment it is important to keep everythingthe same except for the one variable you are testingto you'll know that variable is what's caused your results.
a)
True
b)
False
3.
Data written as numbers or figures is known as -----data.
a)
Quantitative
b)
descriptive
c)
mathematical
d)
qualitative
4.
A hypothesis is a statement that can be ------.
a)
Repeated
b)
tested
c)
proved
d)
observed
5.
Data written as words or descriptions is known as _______ data.
a)
quantitative
b)
descriptive
c)
mathematical
d)
qualitative
6.
What are the smallest units of matter?
a)
atoms
b)
elements
c)
protons
d)
nucleus
7.
A(n)_______ is a substance that cannot be broken down Into slmler substances.
a)
compound
b)
molecule
c)
element
d)
matter
8.
_______ are located on the left side of the periodic table, except _______.
a)
metals / nitrogen
b)
nonmetals / hydrogen
c)
metals / hydrogen
d)
nonmetals / iron
9.
Nonmetals are located on the ----- side of the periodic table, plus hydrogen.
a)
left
b)
right
c)
middle
d)
bottom
10.
Approximately 78% of the air we breathe is made up of _____.
a)
hydrogen
b)
oxygen
c)
carbon dioxide
d)
nitrogen
11.
Approxlmetely 20% of the air we breathe is made up of _______.
a)
hydrogen
b)
oxygen
c)
carbon dioxide
d)
nitrogen
12.
Which of the following is NOT a property of an acid?
a)
tastes sour
b)
conducts electricity
c)
feels slippery
d)
is corrosive
13.
What is a measure of how acidic or basic a solution is?
a)
pH
b)
indicator
c)
litmus paper
d)
tenfold
14.
Which of the following is NOT a property of a base?
a)
tastes bitter
b)
conducts electricity
c)
reacts strongly with metals
d)
feels slippery
15.
In a ------- change,appearance (form) can change,but the substance does not.
a)
physical
b)
chemical
16.
A(n) --- -- --is a chemical combination of 2 or more elements.
a)
mixture
b)
compound
c)
alloy
d)
solution
17.
-----occurs when :1 force causes an object to move in the same direction that the force is applied.
a)
work
b)
power
c)
mechanical advantage
d)
joule
18.
----- is how quickly work is done.
a)
work
b)
power
c)
mechanical advantage
d)
efficiency
19.
---------- is a device that makes doing work easier.
a)
Inclined plane
b)
Screw
c)
Machine
d)
Lever
20.
A machine does NOT change the ------ that needs to be done.
a)
amount of energy
b)
amount of work
c)
kinetic energy
d)
efficiency
21.
The efficiency of a real machine is always ------because of friction.
a)
less than 100%
b)
more than 100%
22.
states that an object acted upon by an unbalanced fore willaccelerate in the direction of the force.
a)
Newton's 1st law of motion
b)
Newton's 2nd law of motion
c)
Newton's 3rd law of motion
23.
_______ states that object will remain at rest or move in a straight line with constant speed unless a force acts on it.
a)
Newton's 1st law of motion
b)
Newton's 2nd law of motion
c)
Newton's 3rd law of motion
24.
________ states that forces always act In equal but opposite pairs.
a)
Newton's 1st law of motion
b)
Newton's 2nd law of motion
c)
Newton's 3rd law of motion
25.
Forces that are equal but opposite in direction and cancel each other out are ________.
a)
unbalanced forces
b)
balanced forces
c)
friction
d)
weight
26.
------- is a force that resists motion and is always present between 2 moving surfaces.
a)
Unbalanced forces
b)
Balanced forces
c)
Friction
d)
Weight
27.
----------- have a negative charge.
a)
protons
b)
neutrons
c)
electrons
d)
atoms
28.
1. Objects with the same type of charge (+/+ or -/-) each other.
a)
attract
b)
repel
29.
A material inwhich electrons cannot move easi y from place to placeis called a(n) -------.
a)
conductor
b)
metalloid
c)
magnet
d)
insulator
30.
Electric -------- is the flow of electrical charges.
a)
energy
b)
circuit
c)
current
d)
spectrum
31.
An electric ------- is a closed loop through which electrical charges flow continuously.
a)
energy
b)
circuit
c)
current
d)
spectrum
32.
A circuit is an electric circuit that has only one pat of electric current to follow.
a)
series
b)
parallel
c)
electric
d)
power
33.
Objects with opposite charges (+/-) -------each other.
a)
attract
b)
repel
34.
-------- have a positive charge.
a)
protons
b)
neutrons
c)
electrons
d)
atoms
35.
The measureof how difficultit is for electrons to flow through a material is called ------.
a)
current
b)
resistance
c)
voltage
d)
insulators
36.
A circuitis an electric circuit that has more than 1path for electric current to follow.
a)
power
b)
electric
c)
series
d)
parallel
37.
A material in which electrons can move more easily from place to place. withinthe material is called a(n) _.
a)
conductor
b)
metalloid
c)
magnet
d)
insulator
38.
Which of the followingis NOT an example of aninsulator?
a)
plastic
b)
wood
c)
wire
d)
rubber
39.
What type of metal has low resistance andis one of the best electric conductors?
a)
iron
b)
copper
c)
aluminum
d)
mercury
40.
In a series circuit,if a path is broken,the current will nolonger flow & the devices in the circuit will stop working.
a)
True
b)
False
41.
Conductors generally have a much higher resistance thaninsulators.
a)
true
b)
false
42.
--------- converts chemical energy into electric potential energy.
a)
generators
b)
motors
c)
electric circuits
d)
batteries
43.
The closer you get to a charge,an electric field gets -----.
a)
stronger
b)
weaker
44.
________ costs are based on the amount of energy used per second of time.
a)
Electric current
b)
Electric circuit
c)
Electric power
d)
Battery
45.
A -----is a disturbance that moves through matter or space.
a)
crest
b)
trough
c)
wave
d)
rarefaction
46.
A high pointin a transverse wave is called a _________.
a)
crest
b)
trough
c)
wave
d)
rarefaction
47.
A low point in a transverse wave is called a __________.
a)
crest
b)
trough
c)
wave
d)
rarefaction
48.
The distance between 1point on a wave and the nearest point moving the same speed and directionis the --------· For a transverse wave,it is the distance between 2 adjacent crests or troughs.
a)
wavelength
b)
frequency
c)
intensity
d)
pitch
49.
________ is the human perception of the frequency of sound.
a)
Wavelength
b)
Frequency
c)
Intensity
d)
Pitch
50.
The ________ of a wave is the number of wavelengths that pass by a point each second.For a transverse wave,it is the number of crests or troughs that pass a point each second.
a)
Wavelength
b)
Frequency
c)
Intensity
d)
Pitch
51.
The amountof energy that a wave carries past a certainarea each secondis the ________ of the sound. It is measured in units called decibels (dB).
a)
Wavelength
b)
Frequency
c)
Intensity
d)
Pitch
52.
------- occurs whe·nwaves bounce off of a surface.
a)
A. Diffraction
b)
refraction
c)
reflection
d)
Compression
53.
-------occurs when waves change direction as they travel from one medium to another.
a)
A. Diffraction
b)
refraction
c)
reflection
d)
Compression
54.
-------occurs when waves bend found an obstacle.
a)
A. Diffraction
b)
refraction
c)
reflection
d)
Compression
55.
The range of electromagnetic waves that we can see is known as --------------.
a)
sound
b)
speed
c)
visible light
d)
energy
56.
In the human ear, the ear ls the sound collector.
a)
outer
b)
inner
c)
A. middle
57.
In the human ear,the ear Is the sound Interpreter.
a)
outer
b)
inner
c)
A. middle
58.
In the human ear, the ------------- is the sound interpreter.
a)
outer
b)
inner
c)
middle
59.
The waves that carry radio and television signals to your home are -------.
a)
Infrared waves
b)
ultraviolet waves
c)
radio waves
d)
x-rays
60.
------------- are waves with high energy, short wavelength,and help doctors determine if you ,have broken bones when you are Injured.
a)
Infrared waves
b)
ultraviolet waves
c)
radio waves
d)
x-rays
61.
---------- are the types of waves that can cause sunburn.
a)
Infrared waves
b)
ultraviolet waves
c)
radio waves
d)
x-rays
62.
All warm bodies emit .
a)
Infrared waves
b)
ultraviolet waves
c)
radio waves
d)
x-rays
63.
__________ waves are composed of 2 parts: an electric part and a magnetic part.
a)
Transverse
b)
Compressional
c)
Longitudinal
d)
Electromagnetic
64.
The smallest unit of an organism that carries on the functions of life are
a)
cells
b)
viruses
c)
organelles
d)
organs
65.
A series of folded structures that allow the movement or transport of things withinthe cell is the
a)
Golgi body
b)
endoplasmic reticulum
c)
vacuole
d)
nucleus
66.
Found only in animal cells, this organelle cleans up old cell parts,food, and other things from the cell.
a)
Vacuole
b)
endoplasmic reticulum
c)
lysosome
d)
ribosome
67.
The regulation of an organism's internal,life-maintaining condition despite changes in its environment.
a)
Evolution
b)
binomial nomenclature
c)
genus
d)
homeostasis
68.
The gelatin-like substance found within the cell that holds all cell structures in place within the cell is ---------.
a)
cytoplasm
b)
nucleus
c)
homeostasis
d)
ribosomes
69.
A virus uses a - --------to make copies of itself.
a)
Cell wall
b)
host cell
c)
different virus
d)
bacteria
70.
Found in plant cells,this organelle contains chlorophyll,a green pigment that allows plants to capture energy from the sun and make it into food through photosynthesis.
a)
Cell wall
b)
cell membrane
c)
chloroplast
d)
golgl body
71.
A ------------ is a strand of hereditary material surrounded by a proteincoating.
a)
Bacteria
b)
plant cell
c)
animal cell
d)
virus
72.
All of the changes that take place during the life of an organism are known as .
a)
Homeostasis
b)
development
c)
evolution
d)
binomial nomenclature
73.
The control center of a cell that contains DNA is the .
a)
Nucleus
b)
ribosome
c)
cell membrane
d)
vacuole
74.
Cell organelles that look like a stack of flattened pancakes that package things to be moved in the cell or from the cell are .
a)
Cell membranes
b)
vacuoles
c)
cytoplasm
d)
golgi bodies
75.
The 2-word naming system that scientists use today is known as _.
a)
Homeostasis
b)
Carolus Linnaeus
c)
scientific names
d)
binomial nomenclature
76.
This cell organelle surrounds the cell,controlling what may enter and leave it.
a)
Cell membrane
b)
cell wall
c)
nucleus
d)
cytoplasm
77.
The evolutionary history of an organism is its ------.
a)
Binomial nomenclature
b)
cell theory
c)
phylogeny
d)
evolution
78.
The cell membrane provides storage for various things in the cell such as water, waste,or food. It is large in plant cells,but small in animal cells.
a)
Ribosomes
b)
golgi bodies
c)
lysosomes
d)
vacuoles
79.
The largest group in the classification system used today is the _.
a)
Genus
b)
species
c)
kingdom
d)
phylum
80.
The smallest group inthe classification system used today is the -------.
a)
Genus
b)
species
c)
kingdom
d)
phylum
81.
These organelles produce proteins inside the cell.
a)
Ribosomes
b)
golgi bodies
c)
lysosomes
d)
viruses
82.
------------ is a way of showing how energy in the form of food passes from one organism to another.
a)
food web
b)
food chain
c)
ecosystem
d)
water cycle
83.
----------- is a symbiotic relationship in which both species benefits.
a)
Mutualism
b)
commensalism
c)
parasitism
d)
symbiosis
84.
Factors that are living or once-living parts of the environment are factors.
a)
abiotic
b)
biotic
c)
community
d)
biosphere
85.
Water, light,temperature air, and soil are examples of factors.
a)
abiotic
b)
biotic
c)
community
d)
biosphere
86.
-------------- are consumers that eat both plants and animals.
a)
Carnivores
b)
herbivores
c)
omnivores
d)
scavengers
87.
Factors that are non-living parts of the environment are factors.
a)
Abiotlc
b)
Biotic
c)
Community
d)
Scavengers
88.
-------------- is the role (job) of an organism in the ecosystem.
a)
niche
b)
habitat
c)
predation
d)
symbiosis
89.
----------- occurs when one species hunt, kill, and eats another organism.
a)
niche
b)
habitat
c)
predation
d)
symbiosis
90.
----------- is an organism that uses energy from the sun to make its own food/energy (photosynthesis).
a)
consumer
b)
producer
c)
primary consumer
d)
secondary consumer
91.
----------- is where an organism lives.
a)
niche
b)
habitat
c)
predation
d)
symbiosis
92.
---------- eats the primary consumer.
a)
primary producer
b)
herbivore
c)
tertiary consumer
d)
secondary consumer
93.
---------- is the study of the interactions among organisms and their environment.
a)
ecosystem
b)
ecology
c)
environment
d)
science
94.
---------- is the part of earth that supports life.
a)
biome
b)
ecosystem
c)
symbiosis
d)
biosphere
95.
----------- are factors that limit the number of individuals in a population.
a)
limiting factors
b)
biotic factors
c)
abiotic factors
d)
biotic potential
96.
A consumer that eats plants only is a(n) ----------.
a)
carnivore
b)
herbivore
c)
omnivores
d)
decomposer
97.
The maximum population size that can live in an environment over times is known as -----------.
a)
limiting factor
b)
biotic potential
c)
carrying capacity
d)
population density
98.
All of the communities in an area and the biotic factors that affect them make up the ----------.
a)
environment
b)
population
c)
ecosystem
d)
population density
99.
A consumer that eats animals only is a(n) -----------.
a)
carnivores
b)
herbivores
c)
ecosystem
d)
population density
100 %
