8th Grade Science 3 Question Preview (ID: 30901)


8th Grade Science Review 3. TEACHERS: click here for quick copy question ID numbers.

Which of the following explains why birds had different beak adaptations on the Galapagos islands?
a) Different food sources
b) Different climate
c) Different predators
d) Different geographic area

Which of the following is the most likely reason for the extinction of many organisms in recent geologic time?
a) Impact event from comet or asteroid
b) Climate change caused by an impact event
c) Large scale volcanic activity changing the climate
d) Habitat destruction and over hunting

Which of the following statements is correct about how geologic time is divided?
a) Eras are divided into periods and periods are divided into epochs
b) Eras are divided into epochs and epochs are divided into periods
c) Periods are divided into eras and eras are divided into epochs
d) Epochs are divided into periods and periods are divided into eras

Which of the following burns to produce energy?
a) Minerals
b) Igneous rocks
c) Fossil fuels
d) Metals

Which of the following is defined by the carrying away of rock?
a) Weathering
b) Erosion
c) Deposition
d) Sedimentary

Which of the following seismic waves cannot travel through the liquid metal outer core of Earth?
a) Primary waves
b) Secondary waves
c) Surface waves
d) all of the answer choices

During what moon phase would you expect moderately low and high neap tides?
a) new moon
b) full moon
c) waning gibbous
d) first quarter

Which of the following best describes how to create a destructive wave resulting in zero?
a) When a crest with an amplitude of 10 mm meets another crest with an amplitude of 10 mm
b) When a crest with an amplitude of 10 mm meets another crest with an amplitude of 20 mm
c) When a crest with an amplitude of 10 mm meets a trough with an amplitude of 10 mm
d) When a crest with an amplitude of 10 mm meets a trough with an amplitude of 20 mm

During what moon phases is a Solar eclipse possible?
a) new moon
b) full moon
c) first quarter
d) waxing gibbous

Which of the following correctly explains the relationship between the mass of an object and the amount of friction?
a) The less massive an object the more friction it will experience
b) The more massive an object the more friction it will experience
c) The less friction an object experiences the more mass it must have
d) The more friction an object experiences the less mass it must have

Which of the following correctly orders celestial objects from smallest to largest?
a) meteorites, planets, stars, solar systems, galaxy, universe
b) planets, meteorites, stars, solar systems, galaxy, universe
c) universe, galaxy, solar systems, planets, meteorites
d) stars, planets, meteorites, solar systems, galaxy, universe

When the northern hemisphere is tilted away from the Sun which of the following is true about South Carolina?
a) South Carolina gets more direct rays and longer days
b) South Carolina gets more indirect rays and longer days
c) South Carolina gets more indirect rays and shorter days
d) South Carolina gets more direct rays and shorter days

Which of the following forces can speed up and/or slow down the speed of an object?
a) friction
b) gravity
c) air resistance
d) all of the answer choices

If Joey is pushing a box to the right with 125 Newtons and Susie is pushing the same box with 125 Newtons the left. Which of the following correctly describes the motion of the box?
a) The object is unbalanced and will move 125 Newtons to the right
b) The object is unbalanced and will move 250 Newtons to the left
c) The object is balanced and will not move
d) The object is balanced and will move 125 Newtons to the right

Which of the following BEST explains why a heavier object is harder to move?
a) The more mass an object has the less inertia
b) The more mass an object has the more inertia
c) the less mass an object has the more inertia
d) heavier object require more force because they have less inertia

Which of the following is the lowest energy electromagnetic wave?
a) visible light
b) radio waves
c) sound waves
d) seismic waves

Which of the following BEST describes the difference between a TV and a remote control?
a) The TV transmits electromagnetic waves and a remote control receives electromagnetic waves
b) The TV interpretes electromagnetic waves and a remote control transmits electromagnetic waves
c) The remote control receives electromagnetic waves and the TV transmits electromagnetic waves
d) The remote control receives electromagnetic waves and the TV also receives electromagnetic waves

Wave #1 has a shorter wavelength than Wave #2. Which of the following is true?
a) Wave #1 has a lower energy and a greater frequency than Wave #2.
b) Wave #1 has a greater energy and a greater frequency than Wave #2.
c) Wave #1 has a greater energy and a lower frequency than Wave #2.
d) Wave #1 has a lower energy and a lower frequency than Wave #2.

Which of the following best explains why a prism seperates white light into various colors?
a) When visible light waves enter the medium of the prism at an angle they change speed and direction
b) When visible light waves enter the medium of the prism at an angle they bounce off and change direction
c) When visible light waves enter the medium of the prism at an angle they are absorbed and generate heat
d) When visible light waves enter the medium of the prism at an angle they transmit straight through

Which of the following best explains how we see black colored objects?
a) the object absorbs all of the visible light waves
b) the object transmits all of the visible light waves
c) the object refracts all of the visible light waves
d) the object reflects all of the visible light waves

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