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OCCT PRACTICE
OCCT PRACTICE
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This is a general science assessment for 8th grade.
Flashcards
30 cards
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Practice quiz
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Host live
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Questions
30
Answers
1
The era after the Mesozoic era, the Cenozoic era, is called the age of ...
insects
mammals
reptiles
2
Which statement best describes how scientists might predict a future event on Earth.
Measuring the depth of ice sheets using a seismograph.
Measuring potential volcanic activity with seismograph.
Observing nearby asteroids with an anemometer.
Measuring sea current temperatures with sonar.
3
According to the theory of plate tectonics, what makes Earth's plates move?
convection currents in the mantle
volcanic eruptions
gravitational pull of the moon
radiation from Earth's core
4
Most geologists rejected Wegener's idea of continental drift because ...
Wegener could not identify how continents could move.
they were afraid of new ideas.
Wegener was only interested in Earth millions of years ago.
Wegener did not have enough evidence to support his idea.
5
What can be calculated by multiplying an object's mass by its acceleration?
force
distance
speed
inertia
6
Fossils found in rock layers can provide evidence of all of the following except ...
environments in which organisms lived.
past climates of different regions.
genes of past life forms that are now extinct.
extinctions of many kinds of organisms.
7
In an experiment, the variable manipulated and changed on purpose to see what effect it has is
the independent variable.
the experimental control.
a controlled variable.
the dependent variable.
8
When graphing data, what variable goes on the y-axis?
Dependent
Constants
Controlled
Independent
9
If the data from an experiment does not support your hypothesis ...
your investigation failed by not showing anything.
your data may still contain useful information.
you did,the experiment wrong.
your hypothesis was useless.
10
Coal is a solid fossil fuel formed from ...
rocks.
the remains of ocean animals.
solidified lava.
piled-up plant remains.
11
When making measurements you always take multiple measurements or trials in order to ...
have enough data to graph.
practice using your measurement device.
improve the accuracy of your measurements.
fill up your data table.
12
The law of conservation of mass states that during a chemical reaction...
matter is partially destroyed.
matter does not change states.
matter gains mass and atoms.
matter is not created or destroyed.
13
What property of matter is measured using the units liter, milliliter, and/or cubic centimeter?
volume
length
mass
weight
14
At a plate boundary where plates are converging, what is least likely to occur?
subduction
earthquakes
mid-ocean ridge
folded mountains
15
The idea that the same processes operating today also operated the same in the past is called
uniformitarianism
physical weathering
evolution
conservation
16
When graphing distance and time, the line on the graph represents ...
force
direction
acceleration
speed
17
Which of the following is an example of a physical change?
Iron filings clinging to the end of a magnet.
Frost on the window on a cold morning.
Leaves changing color in Autumn.
A nail rusting after being left in the rain.
18
In the rock cycle, what two processes contribute to the formation of metamorphic rock?
weathering and erosion
melting and cooling
heat and pressure
compaction and cementation
19
In what direction do seismic waves carry the energy of an earthquake?
From the focus only toward the surface of the earth.
From the center of the earth toward the epicenter.
Away from the focus in all directions.
From the epicenter toward the focus.
20
When the line on a distance-time graph is horizontal, the object is ...
Speeding up
Moving at a constant rate
Slowing down
Stationary
21
The law of superposition tells you ....
the radio active decay of rocks.
the relative age of rock layers.
the actual age of rock layers.
the type of rock in rock layers.
22
An element is determined by its atomic number which identifies ...
how many electrons it has.
how many neutrons it has.
how many protons it has.
the sum of its neutrons and protons.
23
What must be true about the total # of atoms in the reactants and products in a reaction?
They must equal 100.
They must change.
They must be equal.
They must be different.
24
When all the forces acting on an object cancel each other out, we say the forces are ...
balanced.
due to gravity.
unbalanced.
unimportant.
25
What data would best identify the geologic time period of rock layers in a hill?
The type of rock in each layer.
The number of fossils in each layer.
The type of fossils in each layer.
The thickness of each layer.
26
When working with flame or chemicals, what is your most important piece of safety equipment?
Apron
Fire blanket
Goggles
Safety shower
27
Lightening strikes a tree in the forest, causing it to burn. The tree undergoes a ...
magnetic change.
chemical change.
color change.
physical change.
28
Of the following, which activity is part of analyzing data in the scientific process?
gathering equipment for an experiment
organizing collected data in a graph or chart
formulating a testable hypothesis
making careful measurements
29
When a car stops suddenly you continue to move forward because of ...
friction.
inertia.
centripetal force.
gravity.
30
In an experiment, the set up that does not receive the independent variable is called the ...
constant
dependent
control
measured
