8th Grade Science 4: Question Preview (ID: 30923)


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Which of the following orders the parts of the eye that transmit visible light waves to be interpreted by the brain?
a) cornea, convex lens, optic nerve, retina
b) retina, optic nerve, convex lens, cornea
c) optic nerve, retina, convex lens, cornea
d) cornea, convex lens, retina, optic nerve

When you listen to music on your cellphone which of the following is the medium that is transmitting the sound energy from your phone to your eardrum?
a) cellphone
b) air particles
c) electrical wires
d) Speaker

Which of the following best explains why objects with more mass are more difficult to stop?
a) more mass equals more inertia
b) less mass equals more inertia
c) more mass equals less inertia
d) inertia is not effected by mass

On a time-distance graph when a line is straight and not curved which of the following is true?
a) The object increased in speed
b) The object decreased in speed
c) The object traveled at a constant speed
d) The object was traveled back to the reference point

Which of the following space tools helps scientists determine what distant stars are made up of?
a) radio telescope
b) spectroscope
c) refracting telescope
d) reflecting telescope

Which of the following factors influence the force of gravity?
a) mass and distance of objects
b) weight and mass of objects
c) weight and distance of objects
d) mass and inertia

Two days a year the length of day in the northern and southern hemisphere is the same. When are these days called?
a) Solstice
b) Equinox
c) Eclipse
d) Neap

When the northern hemisphere is experiencing summer which of the following is true?
a) The northern hemisphere is receiving more indirect sunlight
b) The northern hemisphere has shorter days
c) The northern hemisphere is tilted away from the Sun
d) The northern hemisphere is receiving more direct sunlight

Which of the following is considered evidence for the theory of plate tectonics which describes that thin layers of the Earth's crust are in motion?
a) Mountain ranges
b) Location of Volcanoes
c) Location of Earthquakes
d) all of the answer choices

Which of the following accurately describes how sedimentary rocks form?
a) weathering, erosion, compaction, deposition
b) weathering, erosion, deposition, cementation
c) erosion, weathering, deposition, cementation
d) cementation, deposition, erosion, weathering

Which of the following describes the breaking down of rock into sediments?
a) weathering
b) erosion
c) deposition
d) cementation

Which of the following correctly orders eras of geologic time from oldest to youngest?
a) Paleozoic, Cenozoic, Mesozoic
b) Cenozoic, Mesozoic, Paleozoic
c) Paleozoic, Mesozoic, Cenozoic
d) Mesozoic, Paleozoic, Cenozoic

Which of the following is theorized to have caused the greatest mass extinction in Earth's history at the end of the Paleozoic era?
a) Volcanic eruptions
b) Habitat destruction
c) Impact event
d) all of the answer choices

Which of the following are the units of geologic time from largest to smallest?
a) Era, period, epoch
b) Period, epoch, era
c) Epoch, period, era
d) Era, epoch, period

Which of the following is a behavior adaptation that may enhance an organisms ability to survive and reproduce?
a) mimicry
b) camoflague
c) migration
d) bird beaks

Which of the following is a comparison (like a placebo) that a good controlled scientific investigation should have?
a) controlled variables
b) dependent variables
c) independent variable
d) control group

Which of the following is important in a good controlled scientific investigation?
a) using correct units of measurement
b) replicate and repeat the experiment
c) control all variables so that there is only one independent variable
d) all of the answer choices

Which of the following should be done before any scientific investigation?
a) Check that all lab materials are working properly
b) Review all lab procedures prior to doing an investigation
c) Put on all required lab safety equipment such as goggles, apron, gloves
d) all of the answer choices

When using a slinky to model various waves which of the following safety procedures is MOST important?
a) Do not overstretch the slinky
b) wear safety gloves
c) wear an apron
d) wear closed toed shoes

Which of the following correctly orders the parts of the ear that transmit sound vibrations to nerve impulses for the brain to interpret as sound?
a) outer ear, eardrum, middle ear, tiny hairs, liquid, auditory nerve
b) auditory nerve, liquid, tiny hairs, middle ear, eardrum, outer ear
c) outer ear, eardrum, middle ear, liquid, tiny hairs, auditory nerve
d) inner ear, middle ear, outer ear, eardrum

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