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WorksheetsScience 8 Showdown - State Test Prep
Total questions: 50
Worksheet time: 27mins
removing
from a patient’s blood. Which human body system
works in a similar way?
When does an object have no kinetic energy?
When it's at rest.
When it's moving very slowly.
When the only force that's acting on it is gravity.
When it has no electrical charge.
Which object has the most potential energy?
A ball resting on the ground.
A ball being thrown at 100 miles per hour.
A ball on top of a refrigerator.
A ball resting on the edge of a cliff.
The diagrams below represent two types of cells, an animal cell and a plant cell. Which type of cell uses energy to carry out life processes?
plant cell, only
animal cell, only
both a plant cell and an animal cell
neither a plant cell nor an animal cell
The diagrams below represent two types of cells, an animal cell and a plant cell. Which type of cell uses energy to carry out life processes?
plant cell, only
animal cell, only
both a plant cell and an animal cell
neither a plant cell nor an animal cell
A diagram representing the levels of organization within an organism is shown below. Which level of organization is identified by X?
cell
tissue
organ
organ system
The diagrams below show models of the circulatory systems of a fish and frog. A student compared these diagrams. The student found that each of these organisms had a heart to pump blood. Which statement is supported by the student’s findings?
Some organisms are composed of one cell, while others are multicellular.
Many multicellular animals have similar organs and specialized systems.
The circulatory system in most organisms removes solid wastes from their bodies.
All animals have identical circulatory systems.
The diagram below represents the life cycle of a butterfly. This life cycle represents the process of
separation from parent
asexual reproduction
metamorphosis
extinction
Water and carbon dioxide are waste products released as a direct result of
asexual reproduction
mechanical digestion
natural selection
cellular respiration
The primary function of a plant’s roots is to
absorb water
perform photosynthesis
produce seeds
exchange gases
Genes are a part of a
cell wall
chromosome
hormone
vitamin
Compared to the amount of genetic information contained in a normal human body cell, the amount contained in a normal human sperm cell is
the same
twice as much
one-half as much
one-fourth as much
The diagram below represents a pedigree chart. Which type of information is organized by this chart?
energy flow in an ecosystem
population growth for pea plants
the number of chromosomes in an organism
the passing of a trait from one generation to another
A change in an animal’s DNA, leading to a variation in a species, is called
a mutation
an infection
selective breeding
sexual reproduction
Which set of terms describes natural fertilization and development in humans before birth?
external fertilization, external development
external fertilization, external development
internal fertilization, external development
internal fertilization, internal development
A plant growing toward a light source is an example of an organism
attracting a mate
destroying infectious germs
responding to stimuli
obtaining moisture from the air
A cactus plant, a snake, and a hawk can be members of the same
community
kingdom
population
species
Which substance in green plants needs to absorb sunlight during photosynthesis?
chlorophyll
cytoplasm
oxygen
water
The food label lists nutritional facts about a serving 1 of cereal alone and cereal with a cup of fat-free 2 milk. One nutrient that is obtained only when milk is added to the cereal is
niacin
cholesterol
sodium
phosphorus
The fur on an arctic polar bear appears white all year. The color of the fur is an example of
an adaptation helping an organism to survive
an organism exchanging materials with its environment
an organism responding to internal stimuli
metabolism regulating an organism’s activities
Urban growth and uncontrolled waste disposal by humans most likely results in
conservation of fossil fuels
environmental degradation
improved soil composition
a balanced ecosystem
Cell division occurs as part of which process?
Energy in food is released.
A cut on a person’s finger heals.
A disinfectant destroys microbes.
The body eliminates wastes.
The sign below was posted near a lake. Which environmental problem is most likely indicated by the sign?
toxic waste
global warming
ozone depletion
species extinction
Which human activity would help reduce the amount of carbon dioxide in the atmosphere?
decrease the burning of fossil fuels
decrease the number of recycling programs
increase the human population
increase the number of cars being driven
The data table below shows data for four planets in our solar system. For which planet is the length of the planet’s day longer than the planet’s year?
Mercury
Venus
Earth
Mars
Which weather instrument is used to measure wind speed?
anemometer
barometer
weather vane
raine gauge
Which graph best represents the percentage of the lighted side of the Moon that can be seen by an observer in the northern hemisphere when the Moon is at the positions shown?
Approximately how long does it take for an observer on Earth to view a complete cycle of Moon phases?
12 hours
24 hours
1 month
1 year
The motions of comets and asteroids in our solar system are predictable because they are
smaller than planets
nearly spherical in shape
in orbit around the Sun
controlled by Earth's gravity
The diagram below represents a flashlight that has been turned on. Which form of energy is being converted to electrical energy by the batteries in the flashlight?
chemical
nuclear
solar
sound
Which set of Earth components is arranged in order from solid to liquid to gas?
hydrosphere, atmosphere, lithosphere
hydrosphere, lithosphere, atmosphere
lithosphere, atmosphere, hydrosphere
lithosphere, hydrosphere, atmosphere
The cross section below represents a plunge pool that formed at the bottom of a waterfall. The plunge pool at the bottom of the waterfall was formed mainly by
deposition
evaporation
precipitation
erosion
What is the main source of energy for the water cycle?
the Moon
the Sun
winds
oceans
The diagram below represents a Lystrosaurus. Lystrosaurus was an herbivore that lived on land about 250 million years ago. Fossils of this dinosaur have been discovered on the widely separated continents of Africa and South America. Which statement best explains why Lystrosaurus fossils are found on these two continents?
This dinosaur could fl y to distant locations.
Both continents were once joined together.
Predators transported the remains of this dinosaur between continents.
Glaciers transported the fossils to the two continents.
A student correctly determined the density of two rocks. If the volumes of the two rocks are equal, the rock with the greater density has a
rounder shape
smoother surface
greater mass
smaller size
Which terms best describe the properties of a gas?
definite volume and a definite shape
definite volume and no definite shape
no definite volume and a definite shape
no definite volume and no definite shape
The block diagram below represents a displaced rock structure. Which process was responsible for the displacement of the horizontal rock layers?
folding
faulting
tilting
weathering
Which event is an example of a physical change?
iron rusting
fireworks exploding
eggs cooking
ice melting
The diagram below represents a portion of the Periodic Table of the Elements. Based on its position in the Periodic Table, at room temperature, cadmium is most likely a
noble gas
nonmetal
metal
The model below represents a molecule of ammonia gas.
a compound
a mixture
an element
an atom
The chart below shows the wind-chill temperatures caused by wind speeds at different surface air temperatures. What is the wind-chill temperature when the surface air temperature is 10°F and the wind speed is 20 mph?
-41°F
-9°F
9°F
4°F
The diagram below represents a person using a wheelbarrow to move a heavy load of soil. Which two simple machines are parts of the wheelbarrow?
a lever and a pulley
a lever and a wheel and axle
an inclined plane and a pulley
an inclined plane and a wheel and axle
The diagram below represents the rock cycle. According to this diagram, metamorphic rock is formed by
melting and solidification
burial and compaction
weathering and erosion
heat and/or pressure
