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Worksheets7th Grade Semester Exam
Total questions: 90
Worksheet time: 45mins
Name
Class
Date
1.
Which skill involves creating representations of objects or processes?
a)
classifying
b)
predicting
c)
making models
d)
evaluating
2.
Which of the following do scientists use when observing?
a)
only their senses
b)
only tools
c)
their senses and tools
d)
their tools and observations
3.
What kind of observation deals with numbers?
a)
qualitative
b)
quantitative
c)
sensory
d)
descriptive
4.
Which of the following is an example of a model?
a)
mathematical equation
b)
tool
c)
scientist
d)
observation
5.
Grouping together all of the things that are alike is called
a)
science
b)
classifying
c)
inference
d)
making models
6.
A person who does ___ learns about an explores the natural world.
a)
mathematics
b)
civics
c)
science
d)
language arts
7.
When you state what you think will happen in the future you are
a)
predicting
b)
inferring
c)
guessing
d)
evaluating
8.
A __ variable is changed to test the hypothesis.
a)
dependent
b)
controlled
c)
uncontrolled
d)
independent
9.
The skill of ___ involves comparing observations and data to reach a conclusion about them.
a)
guessing
b)
inferring
c)
evaluating
d)
hypothesizing
10.
You can make a(n) ____ when you interpret something you observe.
a)
evaluation
b)
prediction
c)
inference
d)
hypothesis
11.
A way to gain scientific knowledge is
a)
a hypothesis
b)
a graph
c)
modeling
d)
a conclusion
12.
Which of these is purposely changed during an experiment?
a)
hypothesis
b)
dependent variable
c)
data
d)
independent variable
13.
Which of these is not an example of a way scientists communicate their results?
a)
taking out advertisements in newspapers
b)
publishing articles in scientific journals
c)
giving talks at scientific meetings
d)
exchanging information on the internet
14.
Which of these is a tool that can help you interpret data?
a)
theory
b)
variable
c)
hypothesis
d)
graph
15.
In order for a hypothesis to be accepted as true, the experiment must include
a)
one trial
b)
many trials
c)
many variables
d)
no control group
16.
What is a summary of what is learned from an experiment?
a)
conclusion
b)
hypothesis
c)
data
d)
research question
17.
What is a factor that can change in an experiment?
a)
control group
b)
conclusion
c)
variable
d)
graph
18.
What is a hypothesis?
a)
a fact
b)
educated prediction
c)
conclusion
d)
pure guess
19.
What are facts and figures collected in a experiment?
a)
variables
b)
data
c)
conclusion
d)
hypothesis
20.
In a controlled experiment how many variable are changed purposely?
a)
many
b)
few
c)
two
d)
only one
21.
What is a measure of how much mass is contained in a given volume?
a)
density
b)
weight
c)
height
d)
length
22.
At what temperature does water freeze?
a)
0 Kelvin
b)
0 Fahrenheit
c)
100 Celsius
d)
0 Celsius
23.
When will an object float?
a)
when it is more dense that surrounding liquid
b)
when it is less dense that surrounding liquid
c)
when density is the same as surrounding liquid
d)
when mass is greater than density
24.
What tool is used to measure mass?
a)
thermometer
b)
trundle wheel
c)
ruler
d)
balance
25.
What is the basic unit for measuring volume?
a)
kilogram
b)
meter
c)
Kelvin
d)
liter
26.
What is the measure of the amount of space that an object takes up?
a)
volume
b)
temperature
c)
mass
d)
density
27.
What would you be most likely to measure by immersing an object in water and seeing how much the water level rises?
a)
the mass of a rectangular solid
b)
the volume of a rectangular solid
c)
the mass of an irregular solid
d)
the volume of an irregular solid
28.
Which of these is not an official SI unit of measure?
a)
Kelvin
b)
degrees Celsius
c)
second
d)
liter
29.
Which is a common unit of density?
a)
g
b)
cm3
c)
g/s
d)
g/mL
30.
On what number is the metric system based?
a)
0
b)
1
c)
10
d)
100
31.
What could you use to help you see the data from an experiment?
a)
model
b)
graph
c)
book
d)
table
32.
What is a statement that describes what is expected to happen every time under a particular set of conditions?
a)
Scientific Theory
b)
Hypothesis
c)
Scientific Law
d)
experiment
33.
A scientific theory can change if
a)
proven correct
b)
supported by evidence
c)
every scientist agrees to change it
d)
proven incorrect
34.
If you add up the value in a data set then divide the sum by the total number of values the result would be the
a)
mean
b)
median
c)
mode
d)
range
35.
What kind of graph shows how the dependent variable changes in response to the independent variable?
a)
line
b)
bar
c)
pie
d)
scatter plot
36.
Which term refers to how close a group of measurements are to each other?
a)
estimate
b)
percent error
c)
accuracy
d)
precision
37.
Which of the following best describes the relationship between scientific theories and scientific laws?
a)
theories are well tested, but laws are unverified
b)
both theories and laws offer explanation
c)
theories explain a range of observations, laws describe an observed pattern.
d)
theories are untested hypotheses, laws are facts
38.
A reliable measurement is both __ and precise.
a)
random
b)
accurate
c)
averaged
d)
close
39.
A scientist often relies on a(n) ________ when they cannot obtain an exact number.
a)
inference
b)
conclusion
c)
estimation
d)
precision
40.
___ data are data that do not fit with the rest of the data set.
a)
precise
b)
accurate
c)
anomalous
d)
estimated
41.
Earth's core is made up of iron and ___.
a)
dirt
b)
magma
c)
gold
d)
nickel
42.
What part of the earth creates Earth's magnetic field?
a)
outer core
b)
inner core
c)
crust
d)
mantle
43.
What rock is commonly found in oceanic crust?
a)
granite
b)
basalt
c)
obsidian
d)
coal
44.
What do geologists use to study the earth's interior?
a)
Ocean waves
b)
convection currents
c)
radiation
d)
Seismic Waves
45.
What increases as you move deeper below Earth's surface?
a)
pressure and temperature
b)
just pressure
c)
just temperature
d)
neither pressure or temperature
46.
What is Earth's outer skin of solid rock?
a)
core
b)
mantle
c)
crust
d)
asthenosphere
47.
In which layer of Earth is the asthenosphere located?
a)
inner core
b)
mantle
c)
outer core
d)
crust
48.
Which lists the main layers of Earth from outermost to innermost?
a)
lithosphere, asthenosphere, mesosphere
b)
core, mantle, crust
c)
mantle, core, crust
d)
crust, mantle, core
49.
Which best describes the mantle?
a)
molten metal
b)
dense solid metal ball
c)
hot but solid rock
d)
dry land and ocean
50.
What do geologists call the crust and the uppermost mantle?
a)
lithosphere
b)
asthenosphere
c)
mesosphere
d)
outer core
51.
How does heat move?
a)
from warmer to cooler objects
b)
from cooler to warmer objects
c)
towards a hot object
d)
away from a cold object
52.
How is energy from the sun transferred?
a)
convection
b)
by the force of gravity
c)
radiation
d)
conduction
53.
Heat from which of these causes convection currents inside the earth?
a)
crust and mantle
b)
mantle and core
c)
crust
d)
crust and core
54.
Which of these combines with changes in a fluids density and the force of gravity to set convection currents in motion?
a)
condensation of the fluid
b)
evaporation of the fluid
c)
heating and cooling of a fluid
d)
freezing and melting of a solid
55.
___ is the transfer of heat by movement of a fluid.
a)
radiation
b)
conduction
c)
wind
d)
convection
56.
When you heat an object the particles of the object move
a)
side to side
b)
downward
c)
slower
d)
faster
57.
A cool fluid is __ dense than/as a warm fluid.
a)
more
b)
less
c)
equally
d)
not comparable
58.
When you touch hot sand, heat is transferred by ___ to your skin?
a)
conduction
b)
radiation
c)
convection
d)
gravity
59.
___, convection, and conduction are the three types of heat transfer.
a)
gravity
b)
radiation
c)
wind
d)
rain
60.
The amount of mass in a given volume of a substance is known as___.
a)
weight
b)
length
c)
density
d)
height
61.
About how many rock-forming minerals make up most of the rocks of Earth's crust?
a)
2
b)
20
c)
200
d)
2000
62.
Which terms best describe igneous rocks?
a)
light and easily broken
b)
soft and smooth
c)
hard and dense
d)
soft and dense
63.
Which type of rock forms when heat or pressure change an existing existing rock?
a)
sedimentary
b)
igneous
c)
inorganic
d)
metamorphic
64.
How do course-grained igneous rocks form?
a)
from sedimentary rocks changed under pressure
b)
from large rock particles cemented together
c)
from rapidly cooling lava
d)
from slowly cooling magma
65.
Which of these is NOT a group into which geologists classify rocks?
a)
igneous
b)
metamorphic
c)
sedimentary
d)
crystal
66.
Which is the process that breaks up rock on Earth's surface?
a)
deposition
b)
erosion
c)
compaction
d)
weathering
67.
Which term describes how a rock's surface looks and feels?
a)
density
b)
streak
c)
texture
d)
fracture
68.
Geologists classify sedimentary rocks into three major groups: ___, chemical, and organic.
a)
intrusive
b)
foliated
c)
banded
d)
clastic
69.
After the process of weathering occurs, ___ carries away bits of broken-up rock.
a)
cementation
b)
intrusion
c)
exfoliation
d)
erosion
70.
The series of processes that slowly change Earth's rocks from one kind to another is called the rock ___.
a)
cycle
b)
formation
c)
intrusion
d)
extrusion
71.
A hollow area in sediment in the shape of an organism or part of an organism is a
a)
cast
b)
mold
c)
trace fossil
d)
petrified fossil
72.
A solid copy of the shape of an organism is a
a)
mold
b)
carbon film
c)
cast
d)
fossil record
73.
What type of fossils provide evidence of the activities of ancient organisms?
a)
molds and casts
b)
petrified fossils
c)
trace fossils
d)
carbon films
74.
Which of the following substances is NOT able to preserve entire organisms?
a)
sticky tar
b)
water
c)
amber
d)
ice
75.
Most fossils form when living things die and are buried by __ that hardens into rock over time.
a)
lava
b)
magma
c)
sediment
d)
water
76.
A ___ is an extremely thin coating of carbon on a rock.
a)
trace fossil
b)
carbon film
c)
cast
d)
mold
77.
The term ___ is used to identify a scientist who studies fossils?
a)
geologist
b)
biologist
c)
phrenologist
d)
paleontologist
78.
Scientists study the ___ to learn about the history of life, past environments on Earth, and how different groups of organisms have changed over time.
a)
rock cycle
b)
fossil record
c)
law of superposition
d)
rock record
79.
___ is the gradual change in living things over long periods.
a)
Fossil formation
b)
The rock cycle
c)
Evolution
d)
Science
80.
An organism is __ if it no longer exists and will never live again on Earth.
a)
extinct
b)
endangered
c)
threatened
d)
extirpated
81.
The number of years that have passed since a rock formed is the rock's
a)
relative age
b)
law of superposition
c)
absolute age
d)
index fossil
82.
The age of a rock compared to the ages of other rocks is the rock's
a)
absolute age
b)
geologic age
c)
sedimentary age
d)
relative age
83.
A break in Earth's crust is called a(n)
a)
intrusion
b)
fault
c)
layer
d)
index fossil
84.
According to the law of ___, in horizontal sedimentary rock layers the oldest layer is at the bottom and the youngest layer is at the top.
a)
motion
b)
thermodynamics
c)
superposition
d)
relative age
85.
A formation of igneous rock on Earth's surface is know as a(n)
a)
gap
b)
intrusion
c)
fault
d)
extrusion
86.
Some radioactive ___ can decay over time.
a)
rocks
b)
fossils
c)
compounds
d)
elements
87.
Geologists use radioactive dating to determine the ___ age of rocks.
a)
absolute
b)
relative
c)
estimated
d)
half-life
88.
All plants and animals contain
a)
uranium
b)
carbon
c)
plutonium
d)
lead
89.
An element that has broken down and released particles and energy is said to be ___.
a)
cancerous
b)
stable
c)
radioactive
d)
inert
90.
___ is the time it takes for half of the radioactive atoms in an element to decay.
a)
full life
b)
relative age
c)
absolute age
d)
half-life
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