8th Grade Science
Assessment
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William Nelson
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Science
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8th Grade
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100 questions
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1.
Multiple Choice
What happens to an iron nail when it rusts?
Oxygen in the air dissolves part of the iron
The nail becomes lighter because the rust heats the iron
The nail becomes heavier because rust weighs more than iron
Iron reacts with oxygen in the air, creating iron oxide on the surface of the nail
2.
Multiple Choice
Which formula listed below correctly finds density?
D=v/m
D=m/v
D=g/v3
D=g/v
3.
Multiple Choice
Mass is conserved in both physical and chemical changes.
False
True
4.
Multiple Choice
Change of state is a physical change.
True
False
5.
Multiple Choice
Adding an electron to an atom results in an isotope.
True
False
6.
Multiple Choice
The atomic number is the number of protons in an atom of an element.
True
False
7.
Multiple Choice
The positively charged center of the atom is called the _______
electron cloud
neutron
nucleus
compound
8.
Multiple Choice
The negative particle in an atom is the ____________________
ion
nucleus
neutron
electron
9.
Multiple Choice
Which particles make up the nucleus?
electron and proton
proton and positron
neutron and proton
electron and neutron
10.
Multiple Choice
The freezing of water is a chemical change.
False
True
11.
Multiple Choice
Flammability is a ________ property.
physical
chemical
private
illegal
12.
Multiple Choice
Mass is the amount of matter in an object. _______ is the gravitational pull on the mass of the object.
density
volume
weight
magnetism
13.
Multiple Choice
A spring scale is used to measure which physical property.
mass
density
volume
weight
14.
Multiple Choice
A graduated cylinder is used to measure which physical property?
mass
weight
volume
speed
15.
Multiple Choice
A digital scale is used to measure which physical property?
speed
volume
mass
weight
16.
Multiple Choice
a triple beam balance is used to measure which physical property?
volume
weight
mass
length
17.
Multiple Choice
Which physical property explains why copper is often used in electric wiring?
density
mass
reactivity
conductivity
18.
Multiple Choice
If the formula for density is mass/volume then what is the density of an element that has a mass of 8 g and volume of 2 ml?
4 g/cm3
3 g/cm3
40 g/cm3
30 g/cm3
19.
Multiple Choice
True or False: Mass and weight are the same thing.
True
False
20.
Multiple Choice
True or False: If you take an object from Earth and place it on the moon, its density will not change.
true
false
21.
Multiple Choice
True or False: If you take an object from Earth and place it on the moon, its mass will change.
True
False
22.
Multiple Choice
True or False: If you take an object from Earth and place it on the moon, its weight will change.
True
False
23.
Multiple Choice
Density is expressed as ____________
mass/weight
weight/volume
volume/mass
mass/volume
24.
Multiple Choice
Which are physical properties of matter?
mass
conductivity
volume
boiling/melting point
all of these
25.
Multiple Choice
The ability or inability of a substance to combine with or change into one or more new substances is called a ____________
physical property of matter
chemical property of matter
state of matter
it doesn't matter
26.
Multiple Choice
What is photosynthesis?
how fungi obtain energy
The process in which green plants use oxygen to make carbon dioxide
the process in which green plants use carbon dioxide to make oxygen
the process of absorbing energy by touching things
27.
Multiple Choice
in the chloroplast of a plant cell
in the mitochondria of a plant cell
in the mitochondria of an animal cell
in the chloroplast of an animal cell
28.
Multiple Choice
savanah
desert
ocean
plain
29.
Multiple Choice
Which of the following is one of the biotic factors in a desert ecosystem as well a food protein source for humans?
the Sun
scorpions
water
sand
30.
Multiple Choice
grass
whale
water
plankton
31.
Multiple Choice
evaporation
precipitation
condensation
runoff
32.
Multiple Choice
When an producer doesn't use the Sun in the production of its own food, it uses the process called ___________.
photosynthesis
cellular respiration
evaporation
chemosynthesis
33.
Multiple Choice
What might be an alternative food source for humans to get the (N) nitrogen that make the proteins required for life?
water
sunlight
air
insects
34.
Multiple Choice
Nitrogen is a essential part of ____.
carbonation
proteins and DNA
the water cycle
transpiration
35.
Multiple Choice
The atomic number of elements in the same period...
increase from right to left
increase from left to right
have the same number of protons
have the same number of electrons
36.
Multiple Choice
Elements in the same group have the same number of valence electrons and...
have similar properties
have the same number of energy levels
are metals
contain minerals
37.
Multiple Choice
What is the metalloid in group 13?
sodium
scandium
boron
aluminum
38.
Multiple Choice
When you have two letters in the element symbol, the second letter is always...
uppercase
lowercase
39.
Multiple Choice
What type of change occurs when the appearance changes, but the chemical composition stays the same?
physical change
chemical change
40.
Multiple Choice
revolution
temperature
rotation
orbit
41.
Multiple Choice
The side of Earth facing the Sun would heat up and be in total light all the time.
The side facing the Sun would get very cold and be in darkness.
All places on Earth would experience darkness for half of the year.
All places on Earth would experience light for half the year.
42.
Multiple Choice
The part tilted toward the Sun gets more direct rays and heats up more
The part tilted away from the Sun gets more direct rays and heats up more
The part tilted away from the Sun gets indirect rays and heats up more
The part tilted toward the Sun gets indirect rays and cools down more
43.
Multiple Choice
Easter
Christmas
Winter
Spring
44.
Multiple Choice
North Pole
Antarctic
Bermuda Islands
Equator
45.
Multiple Choice
rotates
revolves
skips
bounces
46.
Multiple Choice
Mars and Jupiter
Sun and moon
Pluto and Neptune
Mercury and Saturn
47.
Multiple Choice
tides in the Spring
tides during new moon and full moon
tides that are warm
tides that cause flowers to bloom in the Spring
48.
Multiple Choice
the Sun and moon's gravity
the Sun and Earth's gravity
ocean currents
the revolution of the Earth around the Sun
49.
Multiple Choice
16 hours
8 hours
6 hours
24 hours
50.
Multiple Choice
crescent moon
last quarter
first quarter
new moon
51.
Multiple Choice
CO2 + light + H2O --> O2 + Sugar
CO2 + sugar + H2O --> O2 + light
O2 + light + H2O --> CO2 + Sugar
CO2 + O2 + H2O --> Light+ Sugar
52.
Multiple Choice
hydrogen
oxygen
nitrogen
carbon dioxide
53.
Multiple Choice
water and carbon dioxide
oxygen and glucose
oxygen and carbon dioxide
oxygen and water
54.
Multiple Choice
Structures of animal cells to produce ATP
Organelles where lipids are elaborated
Specialized structures of plants where food is made
Waste organelle of plants
55.
Multiple Choice
waning crescent
waxing crescent
waning gibbous
waxing gibbous
56.
Multiple Choice
waning crescent
waxing crescent
waning gibbous
waxing gibbous
57.
Multiple Choice
First Quarter
Last Quarter
New Moon
Full Moon
58.
Multiple Choice
First Quarter
Last Quarter or (third quarter)
New Moon
Full Moon
59.
Multiple Choice
First Quarter
Last Quarter
New Moon
Full Moon
60.
Multiple Choice
day
year
week
month
61.
Multiple Choice
orbits
rotates
up
down
62.
Multiple Choice
vernal equinox
axis
solar eclipse
solar flare
63.
Multiple Choice
Which planets are visible from Earth without using a telescope?
Venus, Mars and Jupiter
Saturn, Pluto and Kree
64.
Multiple Choice
Venus experiences an intense greenhouse effect.
True
False
65.
Multiple Choice
____ is the largest planet in the solar system, is the fifth planet from the Sun, and has colorful clouds. One of its 17 moons is the most volcanically active object in the solar system. The planet has a liquid ocean and atmosphere comprised mostly of hydrogen and helium.
Saturn
Pluto
Jupiter
Nova Prime
66.
Multiple Choice
A comet develops a tail because of ____.
energy from the Sun
water from the oceans
air in the sky
lava from volcanoes
67.
Multiple Choice
What is the basic astronomical unit based on?
the length of Jupiter's rings
the distance between Earth and the Sun
the distance between the Sun and moon
the time it takes light to travel in 1 Earth year
68.
Multiple Choice
A light-year is _______
the amount of light in 1 year
the distance light travels in 1 Earth year
the space between light and darkness
the length of light from Earth to the moon
69.
Multiple Choice
They are much smaller
They are so far away
They are not as bright
They are dwarf stars
70.
Multiple Choice
Nebulas
Protostars
Supernova
Neutron Star
71.
Multiple Choice
Stars are really close together in outer space.
True
False
72.
Multiple Choice
Supergiant
Supernova
Black Hole
Nebula
73.
Multiple Choice
The explosion that sent the universe flying out is called _____.
The Big Bang
The Milky Way
The Solar System
The Sun
74.
Multiple Choice
Since the Big Bang, and even today, the universe is still _____.
Expanding
Shrinking
Cooking
Spinning
75.
Multiple Choice
Gamma Rays
Radio Waves
Visible Light
Infrared rays
76.
Multiple Choice
Radio waves
Ultraviolet Rays
Gamma Rays
X-rays
77.
Multiple Choice
X-rays
Visible Light
Gamma Rays
Ultraviolet Rays
78.
Multiple Choice
Spiral
Elliptical
Irregular
French
79.
Multiple Choice
Distance
Temperature
Chemical Composition
All of them.
80.
Multiple Choice
a star and it's surrounding planets
billions of stars held together by gravity
the big bang
a cluster of nebulas
81.
Multiple Choice
a chunk of frozen gases, rock, ice, and dust that orbits around the sun
comet
asteroid
meteoroid
moon
82.
Multiple Choice
Which is another term for a homogeneous mixture?
compound
substance
solution
element
83.
Multiple Choice
Salt water is a ____________
compound
element
molecule
mixture
84.
Multiple Choice
Which below is a heterogeneous mixture?
crushed concrete (limestone, sand, and other rocks)
gold dust (Au)
rusted iron (Fe2O3)
distilled water (H2O)
85.
Multiple Choice
Which are the 2 kinds of substances?
compound and element
element and ion
electron and proton
nucleus and electron cloud
86.
Multiple Choice
True or False: Some substances are elements and some substances are compounds.
false
true
87.
Multiple Choice
Mixtures can be separated using _________ means.
physical
chemical
88.
Multiple Choice
Tap water that contains iron, magnesium, calcium, rocks, and other metals is ____________________
an element
a compound
a mixture
a delicious drink
89.
Multiple Choice
A ____________ dissolves a solute.
solvent
mixture
solution
substance
90.
Multiple Choice
pH is the _____________ of hydrogen.
potential
proton
particle
property
91.
Multiple Choice
Which is the neutral measure (water) on the pH scale?
0
3
7
10
92.
Multiple Choice
A strong acid is ______ on the pH scale.
1.0
10
7.0
6.5
93.
Multiple Choice
A _________ is any solution measured above 7 on the pH Scale
hydroxide ion
acid
base
mixture
94.
Multiple Choice
What is neutral on the pH Scale?
acids
bases
water
vinegar
95.
Multiple Choice
When 2 or more reactants combine, the result is called a _____________
horse with no name
product
multiplier
hydronium ion
96.
Multiple Choice
When you combine vinegar with baking soda, how do you know a chemical reaction took place?
fire is produced
gas is produced
ice is produced
smoke is produced
97.
Multiple Choice
When you prepare dinner both physical and chemical changes take place, which is a chemical change?
cutting carrots
boiling water
toasting garlic bread
peeling potatoes
98.
Multiple Choice
If you mix the acid vinegar with the base baking soda the products are a salt, water, and __________
CO2 gas
liquid nitrogen
ice cream
hydroxide
99.
Multiple Choice
Did the astronauts on Apollo 13 get to walk on the moon during that mission?
no
yes
100.
Multiple Choice
When did the Apollo 13 mission take place?
After the first launch of the SpaceX Falcon Heavy rocket
Before Neil Armstrong walked on the moon
After we landed the astronauts on Mars
Before the last astronaut walked on the moon
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