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Worksheets8th Grade Mock SSA
Total questions: 115
Worksheet time: 1hrs 17mins
In a scientific investigation, the variable that is being changed by the scientist is the:
Independent Variable
Dependent Variable
Constant
Control Group
Ms. Mynatt completes several trials of the same experiment to ensure that her data is accurate. This is an example of:
Repetition
Replication
Independent Variable
Constant
Ms. Mynatt completes several trials of the same experiment to ensure that her data is accurate. She then gives her materials and procedure to Ms. Hyde and Ms. Hyde completes the same experiment. This is an example of:
Repetition
Replication
Independent Variable
Dependent Variable
Rocks formed through heat and pressure
Igneous
Metamorphic
Sedimentary
A new brand of headache medication wants to test if their medication is effective. They find 20 people with headaches. They give their medication to Group A and they give flavored water to Group B. Which is the control group?
Group A
Group B
The _________ group is the group not receiving any treatment.
Control
Experimental
Variables that must be the same across all groups in an experiment are
Constants
Independent
Dependent
Why does scientific knowledge change over time?
Scientists like to make things complicated
Scientists like to change their minds
New evidence and discoveries lead to revisions in their understanding
Scientific knowledge does not change
Which of the following best describes empirical evidence in science?
Evidence based on personal feelings
Evidence that a scientist obtained by talking to another scientist
Evidence gathered through experiments and observations
Evidence obtained through textbooks
What is the main difference between scientific theories and scientific laws?
Theories are ideas and laws are proven
Theories explain why something happens, while laws describe what happens
Theories are always correct, while laws can be incorrect
Theories describe what happens, while laws explain why something happens
What is a common limitation of scientific models?
They are always accurate representations and to scale
They cannot be used to make predictions
They are based on opinion rather than evidence
They simplify complex systems and may not capture all details
Which of the following is most similar to Oxygen?
Polonium
Gold
Nitrogen
Neon
Which of the following is most similar to Gold?
Silver
Platinum
Mercury
Iodine
Transfer of heat through electromagnetic waves ex: sunlight or warmth from a fire
Conduction
Convection
Radiation
Transfer of heat through direct contact
Conduction
Convection
Radiation
Transfer of heat through the movement of a liquid or gas (circulation)
Conduction
Convection
Radiation
How do ocean currents influence local weather?
By affecting the direction of the wind
By transporting heat and moisture
By causing earthquakes
By creating tornadoes
What is the main difference between weather and climate?
Weather refers to long-term patterns while climate refers to short-term atmospheric conditions
Weather refers to short-term atmospheric conditions, which climate refers to long-term patterns
Weather and climate are the same thing
Weather refers to conditions on land, which climate refers to conditions at sea
Ice
Geosphere
Hydrosphere
Cryosphere
Biosphere
Layer of gases surrounding the Earth
Geosphere
Atmosphere
Biosphere
Cryosphere
All of Earth's water
Atmosphere
Geosphere
Biosphere
Hydrosphere
All living things
Hydrosphere
Biosphere
Geosphere
Cryosphere
Earth's layers, rock, and landforms
Geosphere
Biosphere
Hydrosphere
Cryosphere
Movement of sediment
Weathering
Erosion
Deposition
Breaking down of rocks and minerals into smaller pieces
Weathering
Erosion
Deposition
Dropping sediment in a new location
Weathering
Erosion
Deposition
The cooling and hardening of magma
Metamorphic
Igneous
Sedimentary
Which statement best summarizes cell theory?
All living things are made up of cells, cells are the basic unit of structure, and come from existing cells
All cells have a cell wall
Cells are only found in animals not in plants
Cells have a nucleus, mitochondria, and chloroplasts
Caused by the compaction and cementation of pieces of rock and fossils
Metamorphic
Igneous
Sedimentary
Which TWO organelles do plant cells have that animal cells do not?
Chloroplasts
Cell Wall
Mitochondria
Nucleus
In the levels of organization, which level is the most broad?
Kingdom
Domain
Species
Family
In the levels of organization, which level is the most specific?
Domain
Class
Species
Genus
The scientific name of an organism is made up of its _______ and ________.
Genus; Family
Genus; Species
Genus; Domain
Genus; Order
Sediment being carried away by wind
Weathering
Erosion
Deposition
Which of the following accurately describes the organization of living things? (in order from basic to complex)
Organ, organ system, tissue, cell
Cell, tissue, organ system, organ
Cell, tissue, organ, organ system
organ system, organ, cell, tissue
Which organ system is responsible for delivering oxygen to cells and removing carbon dioxide from the body?
Circulatory
Excretory
Respiratory
Nervous
What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed, it simply changes form
Energy can be created and destroyed
Energy can be created but not destroyed
Energy disappears
Which point has the greatest potential energy?
A
B
C
Which layer is the mantle?
1
2
3
4
What is the net force?
500 N
450 N
50 N
25 N
A _________ is two or more atoms of different elements that are chemically combined.
Element
Compound
Mixture
Mixtures are not chemically combined.
True
False
Sediment being dropped and forming a delta.
Weathering
Erosion
Deposition
Light bending
Reflection
Refraction
Absorption
A magnifying glass _______ light.
Reflects
Refracts
Absorbs
Light bouncing
Reflection
Refraction
Absorption
Kinley created a model of the molecules of a solid, liquid, and gas to compare the motion of the particles.
Which state of matter does each image represent?
A - solid, B - liquid, C - gas
A - gas, B - liquid, C - solid
A - liquid, B - gas, C - solid
A - liquid, B - solid, C - gas
Penny placed a tablet of baking soda in a cup of water. The tablet immediately began to bubble, fizz, and eventually dissolve.
Did a physical or chemical change occur and how do you know?
chemical; the tablet gave off a gas in the form of bubbles
chemical; the fizzing sound indicates a new substance was formed
physical; the tablet only dissolved in the water and formed a mixture
physical; the water can be boiled off and the tablet residue would be left
The atomic number tells you what?
number of electrons
number of protons and electrons in an atom
number of neutrons
How do you calculate density?
Density=Mass/Volume
Density=Volume/Mass
How do animals get carbon?
By eating plants and or other animals.
They absorb it from the atmosphere.
From the ground
They do not get carbon from anywhere.
What do plants need to perform photosynthesis?
Love
Soil with a high nitrogen (N) content
Water (H2O) + Carbon Dioxide (CO2) and Sunlight Energy
Pollinators such as bees and hummingbirds
In which cell organelle does PHOTOSYNTHESIS take place?
The chloroplast
The mitochondria
The cytoplasm
The golgi apparatus
Where in the cell does cellular respiration take place?
The chloroplasts
The golgi apparatus
The mitochondria
The cell wall
Kristine exercises regularly. The process of cellular respiration makes it possible for Kristine to run on the treadmill and to lift weights. What do her cells do during cellular respiration?
convert kinetic energy into chemical energy
absorb light energy through the chlorophyll in their chloroplasts
combine water and carbon dioxide to produce oxygen and glucose
break down food molecules to release energy in the form of ATP
A timeline of some models of atoms throughout history is shown above. These models have contributed to the formation of the atomic theory. Which statement BEST summarizes the development of the atomic theory over time?
The discovery of new evidence resulted in changes to the atomic theory.
Advancements in atomic models proved the atomic theory was accurate.
The atomic theory was modified with the discovery of every new element.
Changes in atomic models showed that the atomic theory was based on opinion.
The change in seasons is a result of what?
rotation
ravioli
revolution
Earth's tilt on its axis as it revolves around the sun
Which causes day and night?
revolution
ravioli
rotation
Earth's tilt on its axis as it revolves around the sun
Which is most responsible for Earth's tides?
the sun
the moon
mars
humans
Which statement is true concerning the diagram:
The tidal range would be high because it is a spring tide
The tidal range would be low because it is a spring tide
The tidal range would be high because it is a neap tide
The tidal range would be low because it is a neap tide
The force that holds the planets in orbit around the sun is called?
Rotation
Gravity
Friction
Pressure
What makes the moon look bright in the sky?
The moon reflects light from Earth.
The moon reflects light from the Sun.
The moon generates its own light.
The moon absorbs light from the stars.
What type of model is shown?
geocentric
Wheels on wheels
heliocentric
galaxy
The distance between objects, along with the masses of the objects, affect the gravitational force between the objects. Which statement is true according to Newton’s law of universal gravitation?
When the masses of objects increase, gravitational force decreases.
When distance between objects increases, gravitational force decreases.
When distance between objects decreases, gravitational force decreases.
When the masses of objects decrease, the distance between objects decreases.
Where is the energy for the Sun created?
in the Sun's atmosphere
in the convection zone
in the hot zone
in the core
In the wave above, which is the wavelength?
A
B
C
D
E
Why does sound travel faster through a solid object than in the air?
The atoms are smaller in a solid object than the atoms in the air.
The atoms in the solid object are closer together than the atoms in the air.
The atoms are larger in the solid object than the atoms in the air.
The atoms in the solid object are farther apart than the atoms in the air.
The ratio of mass of a substance to volume of a substance.
Luster
Mass
Texture
Density
A description of the way a surface looks when light reflects off of the surface. (How shiny or dull it is)
Luster
Density
Solubility
Freezing Point
The quality of being soluble. (ability of a solid to dissolve into a liquid)
density
solubility
malleability
luster
The ability to transmit or transfer heat or electricity through a material.
Magnetism
Conductivity
Density
Flammability
The measure of the amount of matter in an object.
Mass
Volume
Density
Shape
What is a measurement of the gravitational force of attraction of the earth acting on an object?
mass
weight
volume
density
Through which of the following would Sound Waves move the fastest?
Water
Air
Carbon Dioxide
Wooden Table
In science, what is a vacuum?
An experiment
Empty space
The mass
The weight
When heat is added how do atoms behave?
Atoms speed up and more collisions occur
Atoms slow down and less collisions occur
When a solid changes directly to a gas, what change in state has occurred?
Freezing
Melting
Sublimation
Condensation
The movement of plates is due to convection currents in the ________.
Mantle
Inner Core
Outer core
Crust
Which layer is most dense?
Outer Core
Inner Core
Mantle
Crust
Which of the following orders the rock layers accurately from oldest to youngest?
1, 2, 3, 4, 5
5, 4, 3, 2, 1
2, 3, 4, 5, 1
1, 2, 3, 5, 4
What is Natural Selection?
The oldest organisms die
The organisms best suited for their environment survive and reproduce
An organisms body starts changing the older is gets
A possible explanation for an observation that can be tested by scientific investigations.
prediction
hypothesis
inference
claim
The act of using one or more of your senses to gather information and taking note of what occurs.
empirical evidence
observation
science
prediction
A scientific investigation performed in controlled settings such as a laboratory and involving different test groups.
field study
experiment
investigation
study abroad
A summary of the information gained from testing a hypothesis.
inference
conclusion
prediction
hypothesis
Plants make their own food called
glucose
oxygen
carbon dioxide
chloroplast
What is the green pigment (coloring) found in chloroplasts in plants?
glucose
sugar
oxygen
chlorophyll
What are the small openings on an underside of a leaf through which gas is exchanged?
stem
stomata
chlorophyll
chloroplasts
What equation is this?
Photosynthesis
Cellular Respiration
What equation is this?
Photosynthesis
Cellular Respiration
Which is true about Bob's speed between 4 and 6 hours?
His speed was faster than it was during 0 to 2 hours.
His speed was the same as it was during 0 to 2 hours.
His speed was slower than it was during 3 to 4 hours.
His speed was the same as it was during 3 to 4 hours.
Why is the Equator warmest?
Because it is closest to the sun.
Because it receives the most direct sunlight
Because no clouds form here.
Because it is far from the sun
Which of the following best describes the tilt of the earth when it is summer in the southern hemisphere?
The northern hemisphere is tilted toward the sun
The northern hemisphere is tilted away from the sun
The southern hemisphere is tilted toward the sun
The southern hemisphere is tilted away from the sun
In the diagram below, the Northern hemisphere would be in what season at position A?
Fall or Autumn
Spring
Winter
Summer
