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Worksheets8th Grade Vocab.
Total questions: 89
Worksheet time: 45mins
Name
Class
Date
1.
A plant or animal at an early stage of development is...
a)
consumer
b)
embryo
c)
pheromone
d)
ganglion
2.
An organism that eats other organisms or organic matter is...
a)
embryo
b)
gangloin
c)
coelom
d)
consumer
3.
An area that is occupied by one animal or group of animals that do not allow other members of the species to enter is...
a)
territory
b)
estivation
c)
pheromone
d)
communication
4.
A period of inactivity and lowered body temperature that some animals undergo in winter as a protection against cold weather and lack of food is...
a)
circadian rhythm
b)
learned behavior
c)
estivation
d)
hibernation
5.
An animal that does not have a backbone is...
a)
coelom
b)
vertebrate
c)
invertebrate
d)
consumer
6.
A transfer of a signal or message from one animal to another that results in some type of response is...
a)
communication
b)
social behavior
c)
estivation
d)
innate behavior
7.
A mass of nerve cells is...
a)
gut
b)
coelom
c)
ganglion
d)
pheromone
8.
A hard external supporting structure is...
a)
segment
b)
exoskeleton
c)
open circulatory system
d)
closed circulatory system
9.
An internal skeleton made of bone or cartilage
a)
segment
b)
antenna
c)
exoskeleton
d)
endoskeleton
10.
A phase in the life cycle of many animals during which a rapid change from the immature form of an organism to the adult form takes place is ...
a)
metamorphosis
b)
metacognition
c)
pheromone
d)
circadian rhythm
11.
A system of canals filled with fluid in an echinoderm
a)
innate behavior
b)
water vascular system
c)
open circulatory system
d)
closed circulatory system
12.
An animal that can use body heat from chemical reactions in its cells to maintain a constant body temperature is ...
a)
ectotherm
b)
endotherm
c)
endoskeleton
d)
exoskeleton
13.
An organism that needs sources of heat outside of itself is ...
a)
exoskeleton
b)
endoskeleton
c)
endotherm
d)
ectotherm
14.
A faint line visible on both sides of a fish that runs the length of its body is ...
a)
lateral line
b)
gill
c)
swim bladder
d)
lung
15.
A respiratory organ in fish in which oxygen form the water is exchanged with carbon dioxide from the blood is ...
a)
lateral line
b)
lung
c)
gill
d)
swim bladder
16.
A gas filled sac that is used to control buoyancy is...
a)
gut
b)
coleum
c)
swim bladder
d)
learned behavior
17.
The aquatic fish-shaped larva of a frog or toad is...
a)
trout
b)
caviar
c)
swim bladder
d)
tadpole
18.
A type of egg that is surrounded by a membrane is...
a)
fish eggs
b)
chicken egg
c)
amniotic egg
d)
toad eggs
19.
The act of grooming and maintaining their feathers is...
a)
combing
b)
seeding
c)
cleaning
d)
preening
20.
The shedding of an exoskeleton, skin, feathers, or hair is..
a)
molting
b)
preening
c)
flaking
d)
soaring
21.
A soft feather that covers the body of young birds and provides insulation to adult birds is...
a)
contour feathers
b)
wing feathers
c)
down feathers
d)
hollow feathers
22.
An external feather that helps to determine the shape of the bird is...
a)
hollow feathers
b)
contour feathers
c)
down feathers
d)
colorful feathers
23.
An upward force on an object that moves is...
a)
molt
b)
preen
c)
brood
d)
lift
24.
To sit on and cover eggs to keep them warm until they hatch is...
a)
brooding
b)
preening
c)
molting
d)
social behavior
25.
A gland that secretes milk is...
a)
diaphragm
b)
ganglion
c)
coelom
d)
mammary gland
26.
A dome shaped muscle that is attached to the lower ribs and functions as the main muscle in respiration is...
a)
diaphragm
b)
gut
c)
extivation
d)
marsupial
27.
A mammal that nourishes its unborn offspring inside its uterus is...
a)
monotreme
b)
placental mammal
c)
marsupial
d)
kangaroo
28.
The length of time between fertilization and birth is...
a)
year
b)
month
c)
day
d)
gestation period
29.
The time that is required for the Earth to orbit the Sun is...
a)
hour
b)
day
c)
month
d)
year
30.
A division of the year that is based on the orbit of the moon around the Earth is...
a)
year
b)
month
c)
day
d)
hour
31.
The time required for the Earth to rotate once on it's axis is...
a)
year
b)
month
c)
day
d)
hour
32.
A telescope that uses a curved mirror to gather and focus light from distant objects is...
a)
refracting telescope
b)
reflecting telescope
c)
removing telescope
d)
radiating telescope
33.
All of the frequencies or wavelengths of radiation is...
a)
cicadian rhythm
b)
pheromene
c)
electromagnetic spectrum
d)
absolute magnitude
34.
A recognizable star pattern is...
a)
zenith
b)
altitude
c)
horizon
d)
constellation
35.
The point in the sky directly above an observer on Earth is...
a)
zenith
b)
altitude
c)
horizon
d)
specturm
36.
The line where the sky and the Earth appear to meet is...
a)
zenith
b)
altitude
c)
horizon
d)
specturm
37.
The distance that light travels in one year is ...
a)
zenith
b)
altitude
c)
light-year
d)
horizon
38.
The brightness of a star as seen from the Earth is...
a)
absolute magnitude
b)
apparent magnitude
c)
spectrum magnitude
d)
light-year madnitude
39.
A large, reddish star late in its life cycle is...
a)
red giant
b)
white dwarf
c)
Big Dipper
d)
North Star
40.
Where most of the stars are located is...
a)
parallax
b)
horizon
c)
main sequence
d)
H-R diagram
41.
A rapidly spinning neutron star is...
a)
supernova
b)
pulsar
c)
neutron star
d)
nebula
42.
A tight group of stars that looks like a ball and contains up to 1 million stars is...
a)
galaxy
b)
globular cluster
c)
open cluster
d)
quasar
43.
The cloud of gas and dust that is believed to have formed our solar system
a)
solar nebula
b)
solar quasar
c)
solar nebula
d)
solar pulsar
44.
Thin outermost layer of the Earth is...
a)
inner core
b)
outer core
c)
mantle
d)
crust
45.
The central part of the Earth is...
a)
inner core
b)
outer core
c)
mantle
d)
crust
46.
The path a body follows as it travels around another body in space is...
a)
rotation
b)
revolution
c)
orbit
d)
spin
47.
The counter-clockwise spin of a planet or moon as seen from above the planet's north pole is...
a)
prograde rotation
b)
retrograde rotation
c)
astronomical unit
d)
revolution
48.
An event in which the shadow of one celestial body falls on another is...
a)
orbit
b)
revolution
c)
eclipse
d)
rotation
49.
A small body of ice, rock, and cosmic dust is...
a)
eclipse
b)
comet
c)
asteroid
d)
meteoroid
50.
A bright streak of light that results when a meteoroid burns up in the Earth's atmosphere is...
a)
comet
b)
asteroid
c)
meteoroid
d)
meteor
51.
The force of attraction between objects is...
a)
gravity
b)
force
c)
velocity
d)
acceleration
52.
A change in a moving object's speed or direction is...
a)
motion
b)
speed
c)
velocity
d)
acceleration
53.
A force that always acts to oppose motion is...
a)
force
b)
friction
c)
gravity
d)
mass
54.
The measure of gravitational force exerted on an object is...
a)
friction
b)
gravity
c)
mass
d)
weight
55.
The speed of an object in a particular direction is...
a)
velocity
b)
acceleration
c)
force
d)
friction
56.
The forward force produced by an airplane's engine is...
a)
Bernoulli's principle
b)
Pascal's principle
c)
drag
d)
thrust
57.
The force that works against the forward motion of a plane is...
a)
Pascal's principle
b)
buoyant force
c)
drag
d)
thrust
58.
The irregular flow of fluids is...
a)
pascal
b)
density
c)
turbulence
d)
ballast
59.
The amount of matter in a given volume is...
a)
pascal
b)
density
c)
turbulence
d)
ballast
60.
A machine with a grooved wheel that holds a cable is...
a)
pulley
b)
wheel and axle
c)
lever
d)
inclined plane
61.
A machine made of two or more simple machines is...
a)
mechanical advantage
b)
joule
c)
compound machine
d)
lever
62.
A device that makes work easier by changing the size or direction of a force is...
a)
watt
b)
machine
c)
work
d)
mechanical efficiency
63.
A machine with a bar that pivots on a fixed point is...
a)
lever
b)
wheel and axle
c)
inclined plane
d)
pulley
64.
The energy of moving electrons is...
a)
electrical
b)
thermal
c)
mechanical
d)
sound
65.
The energy caused by an object's vibrations is...
a)
light
b)
kinetic
c)
potential
d)
sound
66.
The energy of motion is...
a)
light
b)
kinetic
c)
potential
d)
sound
67.
A material that reduces the transfer of thermal energy to a building in summer or from a build in winter is...
a)
radiation
b)
heat
c)
insulation
d)
absolute zero
68.
The transfer of energy between particles of matter or through empty space by electromagnetic waves is...
a)
radiation
b)
thermal expansion
c)
specific heat
d)
insulation
69.
A physical environment in which phenomena occur is...
a)
mechanical wave
b)
surface wave
c)
medium
d)
large
70.
The use of reflected sound waves to find food or other objects is...
a)
echolocation
b)
resonance
c)
decibel
d)
overtones
71.
The unit for measuring loudness is...
a)
resonance
b)
decibel
c)
overtones
d)
tinnitus
72.
This results from long-term exposure to loud sounds.
a)
echolocation
b)
resonance
c)
decibel
d)
tinnitus
73.
Causes sunburn
a)
gamma ray
b)
infrared wave
c)
ultraviolet light
d)
x ray
74.
used to see inside containers without opening them
a)
gamma ray
b)
infrared wave
c)
radio wave
d)
x ray
75.
is white light
a)
gamma ray
b)
infrared wave
c)
visible light
d)
radio wave
76.
The back surface of the eye is...
a)
cornea
b)
iris
c)
lens
d)
retina
77.
The colored part of the eye is...
a)
cornea
b)
iris
c)
lens
d)
pupil
78.
The membrane that protects the eye is...
a)
cornea
b)
iris
c)
lens
d)
pupil
79.
An interaction that holds atoms or ions together is...
a)
valence electron
b)
chemical bond
c)
ionic bond
d)
ion
80.
A charged particle that forms when an atom or group of atoms gains or loses one or more electrons is...
a)
proton
b)
neutron
c)
electron
d)
ion
81.
The smallest unit of a substance that keeps all of the physical and chemical properties of that substance is...
a)
atom
b)
molecule
c)
compound
d)
mixture
82.
The process by which one or more substances change to produce one or more different substances is...
a)
chemical reaction
b)
chemical compound
c)
chemical action
d)
chemical bonding
83.
A combination of chemical symbols and numbers to represent a substance is...
a)
checical reaction
b)
chemical bonding
c)
chemical formula
d)
chemical burn
84.
A reaction in which a single compound breaks down to form two or more simpler substances is...
a)
synthesis reaction
b)
decomposition reaction
c)
singel-displacement reaction
85.
A substance that slows down or stops a chemical reaction is...
a)
catalyst
b)
inhibitor
c)
reaction
86.
A compound that can reversibly change color depending on conditions such as pH is...
a)
acid
b)
indicator
c)
base
d)
metal
87.
An organic compound composed only of carbon and hydrogen is...
a)
salt
b)
pH
c)
neutralization reaction
d)
hydrocarbon
88.
The process by which an unstable nucleus gives off nuclear radiation is...
a)
chemical reaction
b)
radioactivity
c)
mass number
d)
atomic mass
89.
A chemical reaction in which heat is released to the surroundings is...
a)
exothermic reaction
b)
endothermic reaction
c)
double-displacement reaction
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