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WorksheetsWhat Do You Recall About Science Grades 6-8
Total questions: 100
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
What does malleable mean?
a)
can be melted easily
b)
can be hammered into a shape without shattering
c)
shatters easily
d)
hard to melt
2.
What happens when ice melts in your hand?
a)
Coldness from the ice flows to your hand.
b)
Heat from your hand flows to the ice.
3.
Which of the following is a HETEROGENEOUS mixture?
a)
salt water
b)
mixed nuts
c)
tea
d)
milk
4.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
5.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
6.
A heterozygous yellow pea plant's GENOTYPE would be:
a)
YY
b)
yy
c)
Yy
d)
Yellow
7.
What type of cell division is SEXUAL and results in 4 gametes?
a)
mitosis
b)
meiosis
8.
What is one advantage of SEXUAL reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather than from eggs
d)
offspring inherit a wider variety of genetic information
9.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
10.
Elements that have properties of both metals and non-metals are called _______.
a)
halogens
b)
noble gases
c)
metalloids
d)
rare earth metals
11.
When you stretch a rubber band, you are storing __________ energy.
a)
elastic kinetic
b)
elastic potential
12.
Gravitational potential energy depends on the ________ and ________ of the object. HINT: Look at the picture!
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction
13.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
14.
Maintaining steady internal conditions when external conditions change is called _____.
a)
homeostasis
b)
circulation
c)
digestion
d)
respiration
15.
A cleaner fish cleans another big fish. Both fish benefit. What type of symbiotic relationship is this?
a)
predation
b)
mutualism
c)
commensalism
d)
parasitism
16.
Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales. What kind of relationship is this?
a)
Mutualism
b)
Parasitism
c)
Commensalism
17.
The cellular process that combines oxygen and glucose to produce ATP energy, carbon dioxide and water is called ________.
a)
photosynthesis
b)
breathing
c)
mitosis
d)
cellular respiration
18.
Organs that filter waste out of blood are called ______.
a)
small intestines
b)
bones
c)
lungs
d)
kidneys
19.
Which body system gives us structure and produces red blood cells?
a)
digestive
b)
excretory
c)
nervous
d)
skeletal
20.
Organisms that do NOT have a true nucleus are classified in this DOMAIN.
a)
eukaryotes
b)
prokaryotes
21.
Organisms that CANNOT produce their own food are called ________.
a)
heterotrophs
b)
autotrophs
c)
producers
d)
plants
22.
Which characteristic of pure gold ALWAYS stays the same?
a)
density
b)
mass
c)
shape
d)
volume
23.
What type of energy transfer takes place in both a pot of boiling water and in Earth's mantle?
a)
conduction
b)
convection
c)
radiation
24.
X-rays, visible light and radio waves _______________ but sound waves do not.
a)
travel at the speed of light
b)
need a medium, like air, to carry them
c)
slow down in dense materials
d)
transport energy
25.
The average or typical atmospheric patterns over a LONG period of time.
a)
weather
b)
climate
26.
What types of human activities MOST LIKELY cause 10 times more erosion of continental surfaces than all natural processes combined.
a)
recycling and carpooling
b)
swimming and camping
c)
agriculture and construction
d)
fishing and hunting
27.
Which organism MOST LIKELY belongs with the secondary consumers on an energy pyramid?
a)
grass
b)
rabbit
c)
grasshopper
d)
fox
28.
The _____ includes all places on Earth where water is frozen in its solid form (ice, snow, etc.).
a)
hydrosphere
b)
cryosphere
c)
biosphere
d)
geosphere
29.
Which type of electromagnetic radiation has the shortest wavelengths?
a)
radio waves
b)
visible light
c)
gamma rays
d)
ultraviolet light
30.
Which one is NOT a compound?
a)
H2O
b)
N3
c)
hydrogen chloride
d)
FeO
31.
How can you speed up a chemical reaction?
a)
heat up the reactants
b)
cool down the reactants
c)
remove all catalysts
d)
slow down the atoms so that they don't collide
32.
What do all organisms that belong to the PROTIST kingdom have in common?
a)
Protists are all eukaryotes.
b)
Protists are all autotrophs.
c)
Protists are all carnivores.
d)
Protists are all multicellular.
33.
Why are metals useful for making electrical wire?
a)
Metals are NOT malleable.
b)
Metals have a low pH.
c)
Metals are insulators.
d)
Metals are conductors.
34.
What is a example of a insulator?
a)
metal
b)
rubber
c)
water
d)
salt
35.
What part of a plant cell controls what leaves and enters the cell?
a)
semi-permeable cell membrane
b)
cell wall
c)
chloroplast
d)
nucleus
36.
Which type of rock forms under intense heat and pressure?
a)
igneous
b)
metamorphic
c)
sedimentary
37.
Based on the Law of Superposition, which layer of rock is the OLDEST?
a)
top
b)
middle
c)
bottom
38.
How many neutrons are in the nucleus of a Lithium atom?
HINT: Subtract the atomic number from the atomic mass (rounded).
HINT: Subtract the atomic number from the atomic mass (rounded).
a)
4
b)
3
c)
6.941
d)
12
39.
Which part of atom has a negative charge?
a)
neutron
b)
proton
c)
electron
d)
quark
40.
Which peppered moth is MOST likely to survive and reproduce when resting on a tree with dark bark?
a)
Dark Peppered Moth
b)
Light Pepper Moth
41.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
42.
Which limiting factor is MOST likely to reduce a population of mosquitoes?
a)
a drought that causes shallow canals to dry up
b)
an increase in the deer population
c)
a decrease in the frog population
d)
a bacteria that infects gnats
43.
How many stars are in a galaxy?
a)
millions or billions
b)
thousands
c)
hundreds
d)
ten
44.
What is it?
a)
prominence
b)
sun spot
c)
solar wind
d)
asteroid
45.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
46.
What would the INDEPENDENT variable be in an experiment testing which types of paper airplane goes furthest?
a)
the paper used
b)
the type of paper airplane
c)
the distance of each plane's flight
d)
how hard the plane is thrown
47.
In 1897, Joseph Thomson discovered that atoms contained electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson’s discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?
a)
Theories more than ten years old are usually out of date.
b)
Scientists want to prove that the work of other scientists is wrong.
c)
New evidence that supports a revision prompts scientists to modify earlier theories.
d)
So much information is available today that it is harder to focus research and disprove theories.
48.
Why are sunspots darker than the surrounding areas?
a)
The hotter gas releases less light.
b)
The cooler gas releases less light.
c)
Light is trapped deep inside impact craters.
d)
The moon casts shadows that blocks light.
49.
What layer are you looking at when you take a picture of the sun?
a)
core
b)
photosphere
c)
chromosphere
d)
corona
50.
During which part of the hydrologic cycle do trees and other plants release water vapor into the atmosphere?
a)
evaporation
b)
condensation
c)
transpiration
d)
precipitation
51.
The physical layer of Earth made of solid rock and soil is called the ___________.
a)
mesosphere
b)
lithosphere
c)
asthenosphere
d)
mantle
52.
Which liquid is the LEAST dense?
a)
oil
b)
water
c)
syrup
d)
plastic bottle
53.
Which box has a higher density?
a)
Box A
b)
Box B
c)
Cannot be determined.
d)
They are the same.
54.
Where would the oldest rock be found at the Mid-Ocean Ridge?
a)
L
b)
M
c)
N
d)
O
55.
Mountains are created when....
a)
two continental plates collide.
b)
two oceanic plates pull apart.
c)
an oceanic plate subducts under a continental plate.
d)
two continental plates pull apart.
56.
What type of plate boundary is this?
a)
Transform
b)
Convergent
c)
Divergent
d)
Plate
57.
What type of event will occur at this boundary?
a)
Earthquake
b)
Volcano Eruption
c)
Tornado
d)
Mountain Building
58.
What type of plate boundary is this?
a)
Plate
b)
Divergent
c)
Convergent
d)
Transform
59.
Name the boundary
a)
convergent boundary
b)
divergent boundary
c)
transform boundary
60.
The presence of the same types rocks and fossils on several continents supports the theory of _____.
a)
biogenesis
b)
evolution
c)
continental drift
d)
relativity
61.
What happens to water vapor as it rises?
a)
It evaporates and disappears.
b)
It condenses and forms clouds.
c)
It travels great distances and precipitates.
d)
It stays hanging in the air and does nothing.
62.
What causes so many hurricanes to form in the Gulf of Mexico?
a)
Warm Water
b)
Cold Water
c)
Cruise Ships
d)
The Jet Stream
63.
As the frequency of an electromagnetic wave increases the wavelength of that wave ____.
a)
increases.
b)
decreases.
c)
stays the same.
64.
What are the hazards associated with radio waves?
a)
None
b)
Harmful to humans
c)
Burn skin
d)
Cause cancer
65.
What kind of waves does a remote control use?
a)
Gamma
b)
Ultra violet
c)
Visible
d)
Infrared
66.
Which part of the EM spectrum is used to kill cancers?
a)
Radio waves
b)
Microwaves
c)
Ultra violet
d)
Gamma rays
67.
According to the pH scale which substance is more acidic than lemon juice?
a)
hydrochloric acid
b)
cabbage
c)
milk
d)
lye
68.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
69.
A solution with a pH of 7.0 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
70.
What is the color of the HOTTEST star?
a)
blue
b)
red
c)
yellow
d)
brown
71.
The HR Diagram classifies our Sun as a _____.
a)
Main Sequence Star
b)
Red Giant
c)
Blue Super Giant
d)
White Dwarf
72.
Which measurement allows scientist to compare the brightness of stars?
a)
parallax
b)
absolute magnitude
c)
red shift
d)
corona
73.
This protects us from harmful UV rays from the sun....
a)
Troposphere
b)
Stratosphere
c)
Greenhouse Effect
d)
Ozone Layer
74.
What type of chemicals are responsible for breaking up the ozone?
a)
CFCs
b)
Carbon Dioxide
c)
Nitrogen
d)
Oxygen
75.
An increase in which gas is primarily responsible for increased global warming?
a)
Carbon dioxide
b)
Water vapor
c)
Methane
d)
Nitric oxides
76.
A toaster toasting bread is an example of...
a)
condensation
b)
conduction
c)
convection
d)
radiation
77.
A candle slowly heating the metal and transferring the heat directly to the man's hand is an example of....
a)
conduction
b)
convection
c)
radiation
78.
Walking on the warm sand sand with your bare feet demonstrates this type of heat transfer.
a)
conduction
b)
convection
c)
radiation
79.
Which numbered part of the picture represents the way that energy from the Sun reaches Earth?
a)
1
b)
2
c)
3
d)
4
80.
Which force is so low that it causes the man to slip and fall?
a)
Gravity
b)
Friction
c)
Air Resistance
d)
Motion
81.
A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the motion of the cart as a result of the forces?
a)
It slows down to a stop.
b)
It accelerates to the left.
c)
It continues moving at a constant speed.
d)
It changes direction and travels in a circular path.
82.
How will this object move?
a)
It won't move.
b)
It will move to the right.
c)
It will move to the left.
d)
It will move up.
83.
Calculate the Net Force.
a)
60N, on the Left
b)
40N, on the Right
c)
0N, Balanced
d)
60N, on the Right
84.
In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?
a)
They don't; they hit the ground at the same time.
b)
One is more dense than the other.
c)
One is heavier than the other.
d)
Air resistance
85.
How is Earth's magnetic field similar to that of a magnet?
a)
It is hundreds of miles long.
b)
It has north and south poles.
c)
It is made in Earth's core.
d)
It is shaped like a horseshoe.
86.
Why does a compass needle point north?
a)
The compass is a bar magnet.
b)
North is always up.
c)
It's magic.
d)
It lines up with the Earth's magnetic field
87.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
88.
What process is the diagram representing?
a)
Photosynthesis
b)
Cellular Respiration
c)
Carbon Cycle
d)
Nitrogen Cycle
Nitrogen cycle
Nitrogen cycle
89.
Use the graph to identify the INDEPENDENT VARIABLE.
a)
Density
b)
Type of Metal
c)
Type of Compound
d)
Length of Metal
90.
Which method of dating would lead to the LEAST ACCURATE age of a rock?
a)
absolute dating
b)
relative dating
c)
radiometric dating
d)
carbon dating
91.
Fruit fly body cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have ...
a)
16 chromosomes.
b)
46 chromosomes.
c)
8 chromosomes.
d)
4 chromosomes.
92.
A white cat had a litter of kittens that were orange, grey, and black and white spotted. Is this the result of sexual or asexual reproduction? And how would you characterize the offspring listed above?
a)
Sexual reproduction with uniform offspring
b)
Asexual reproduction with diverse offspring
c)
Sexual reproduction with diverse offspring
d)
Asexual reproduction with uniform offspring
93.
What type of asexual reproduction is taking place?
Fishermen work hard to catch and remove all the starfish that get into their favorite shell fishing beds and the “underwater farms” where they raise clams and oysters. In the past, they put the starfish into their boats, cut them up with knives, and then throw the pieces of starfish overboard. They thought this would kill the starfish. What they did not know was that each piece of starfish will grow into a whole new animal.
Fishermen work hard to catch and remove all the starfish that get into their favorite shell fishing beds and the “underwater farms” where they raise clams and oysters. In the past, they put the starfish into their boats, cut them up with knives, and then throw the pieces of starfish overboard. They thought this would kill the starfish. What they did not know was that each piece of starfish will grow into a whole new animal.
a)
Regeneration
b)
Vegetative propagation
c)
Budding
d)
Fission
94.
Prokaryotes (bacteria) reproduce asexually via -
a)
spore formation
b)
bud creation
c)
vegetative propagation
d)
binary fission
95.
Which type of asexual reproduction is taking place
A planarian is a non-parasitic flatworm. If a planarian was injured by a predator, it could re-grow its body parts. If the body parts were not eaten by the predator, the part could re-grow into a whole new planarian as well.
A planarian is a non-parasitic flatworm. If a planarian was injured by a predator, it could re-grow its body parts. If the body parts were not eaten by the predator, the part could re-grow into a whole new planarian as well.
a)
Budding
b)
Fission
c)
Vegetative propagation
d)
Regeneration
96.
Does the type of gasoline put in a car effect how fast the car can drive. What is the independent variable?
a)
Type of gasoline
b)
which car the gas is put into
c)
how fast the car can drive
d)
how much gas is put into the car
97.
The ____________ kingdom includes decomposers , such as mushrooms.
a)
kingdoms
b)
fungi
c)
archaebacteria
d)
nonvascular
98.
____________________ are vertebrates that are warm-blooded, have hair, and give birth to live young.
a)
mammals
b)
animals
c)
amphibians
d)
protists
99.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
100.
I am prokaryotic and am found everywhere. What kingdom do I belong to?
a)
Eubacteria
b)
Archaebacteria
c)
Fungi
d)
Protist
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