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Science 8 Showdown - State Test Prep

Total questions: 50

Worksheet time: 27mins

Name
Class
Date
1.
A cell's chromosomes contain
a)
genes
b)
chlorophyll
c)
sperm
d)
eggs
2.
The human respiratory system is responsible for
removing
a)
fat from cells
b)
carbon dioxide from blood
c)
hormones from glands
d)
nutrients from food
3.
Which process is a cause of variation in a species?
a)
metamorphosis
b)
cellular respiration
c)
sexual reproduction
d)
regulation
4.
A dialysis machine can be used to remove waste
from a patient’s blood. Which human body system
works in a similar way?
a)
reproductive
b)
digestive
c)
excretory
d)
endocrine
5.
Abnormal cell division may result in
a)
disease prevention
b)
tissue repair
c)
metamorphosis
d)
cancer
6.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
7.
What is the unit to MEASURE force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
8.
If an object is not moving the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
9.

When does an object have no kinetic energy?

a)

When it's at rest.

b)

When it's moving very slowly.

c)

When the only force that's acting on it is gravity.

d)

When it has no electrical charge.

10.

Which object has the most potential energy?

a)

A ball resting on the ground.

b)

A ball being thrown at 100 miles per hour.

c)

A ball on top of a refrigerator.

d)

A ball resting on the edge of a cliff.

11.

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?

a)

plant cell, only

b)

animal cell, only

c)

both a plant cell and an animal cell

d)

neither a plant cell nor an animal cell

12.

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?

a)

plant cell, only

b)

animal cell, only

c)

both a plant cell and an animal cell

d)

neither a plant cell nor an animal cell

13.

A diagram representing the levels of organization within an organism is shown below. Which level of organization is identified by X?

a)

cell

b)

tissue

c)

organ

d)

organ system

14.

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?

a)

Some organisms are composed of one cell, while others are multicellular.

b)

Many multicellular animals have similar organs and specialized systems.

c)

The circulatory system in most organisms removes solid wastes from their bodies.

d)

All animals have identical circulatory systems.

15.

The diagram below represents the life cycle of a butterfly. This life cycle represents the process of

a)

separation from parent

b)

asexual reproduction

c)

metamorphosis

d)

extinction

16.

Water and carbon dioxide are waste products released as a direct result of

a)

asexual reproduction

b)

mechanical digestion

c)

natural selection

d)

cellular respiration

17.

The primary function of a plant’s roots is to

a)

absorb water

b)

perform photosynthesis

c)

produce seeds

d)

exchange gases

18.

Genes are a part of a

a)

cell wall

b)

chromosome

c)

hormone

d)

vitamin

19.

Compared to the amount of genetic information contained in a normal human body cell, the amount contained in a normal human sperm cell is

a)

the same

b)

twice as much

c)

one-half as much

d)

one-fourth as much

20.

The diagram below represents a pedigree chart. Which type of information is organized by this chart?

a)

energy flow in an ecosystem

b)

population growth for pea plants

c)

the number of chromosomes in an organism

d)

the passing of a trait from one generation to another

21.

A change in an animal’s DNA, leading to a variation in a species, is called

a)

a mutation

b)

an infection

c)

selective breeding

d)

sexual reproduction

22.

Which set of terms describes natural fertilization and development in humans before birth?

a)

external fertilization, external development

b)

external fertilization, external development

c)

internal fertilization, external development

d)

internal fertilization, internal development

23.

A plant growing toward a light source is an example of an organism

a)

attracting a mate

b)

destroying infectious germs

c)

responding to stimuli

d)

obtaining moisture from the air

24.

A cactus plant, a snake, and a hawk can be members of the same

a)

community

b)

kingdom

c)

population

d)

species

25.

Which substance in green plants needs to absorb sunlight during photosynthesis?

a)

chlorophyll

b)

cytoplasm

c)

oxygen

d)

water

26.

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

a)

niacin

b)

cholesterol

c)

sodium

d)

phosphorus

27.

The fur on an arctic polar bear appears white all year. The color of the fur is an example of

a)

an adaptation helping an organism to survive

b)

an organism exchanging materials with its environment

c)

an organism responding to internal stimuli

d)

metabolism regulating an organism’s activities

28.

Urban growth and uncontrolled waste disposal by humans most likely results in

a)

conservation of fossil fuels

b)

environmental degradation

c)

improved soil composition

d)

a balanced ecosystem

29.

Cell division occurs as part of which process?

a)

Energy in food is released.

b)

A cut on a person’s finger heals.

c)

A disinfectant destroys microbes.

d)

The body eliminates wastes.

30.

The sign below was posted near a lake. Which environmental problem is most likely indicated by the sign?

a)

toxic waste

b)

global warming

c)

ozone depletion

d)

species extinction

31.

Which human activity would help reduce the amount of carbon dioxide in the atmosphere?

a)

decrease the burning of fossil fuels

b)

decrease the number of recycling programs

c)

increase the human population

d)

increase the number of cars being driven

32.

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?

a)

Mercury

b)

Venus

c)

Earth

d)

Mars

33.

Which weather instrument is used to measure wind speed?

a)

anemometer

b)

barometer

c)

weather vane

d)

raine gauge

34.

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?

a)
b)
c)
d)
35.

Approximately how long does it take for an observer on Earth to view a complete cycle of Moon phases?

a)

12 hours

b)

24 hours

c)

1 month

d)

1 year

36.

The motions of comets and asteroids in our solar system are predictable because they are

a)

smaller than planets

b)

nearly spherical in shape

c)

in orbit around the Sun

d)

controlled by Earth's gravity

37.

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?

a)

chemical

b)

nuclear

c)

solar

d)

sound

38.

Which set of Earth components is arranged in order from solid to liquid to gas?

a)

hydrosphere, atmosphere, lithosphere

b)

hydrosphere, lithosphere, atmosphere

c)

lithosphere, atmosphere, hydrosphere

d)

lithosphere, hydrosphere, atmosphere

39.

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

a)

deposition

b)

evaporation

c)

precipitation

d)

erosion

40.

What is the main source of energy for the water cycle?

a)

the Moon

b)

the Sun

c)

winds

d)

oceans

41.

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?

a)

This dinosaur could fl y to distant locations.

b)

Both continents were once joined together.

c)

Predators transported the remains of this dinosaur between continents.

d)

Glaciers transported the fossils to the two continents.

42.

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

a)

rounder shape

b)

smoother surface

c)

greater mass

d)

smaller size

43.

Which terms best describe the properties of a gas?

a)

definite volume and a definite shape

b)

definite volume and no definite shape

c)

no definite volume and a definite shape

d)

no definite volume and no definite shape

44.

The block diagram below represents a displaced rock structure. Which process was responsible for the displacement of the horizontal rock layers?

a)

folding

b)

faulting

c)

tilting

d)

weathering

45.

Which event is an example of a physical change?

a)

iron rusting

b)

fireworks exploding

c)

eggs cooking

d)

ice melting

46.

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

a)

noble gas

b)

nonmetal

c)

metal

47.

The model below represents a molecule of ammonia gas.

a)

a compound

b)

a mixture

c)

an element

d)

an atom

48.

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?

a)

-41°F

b)

-9°F

c)

9°F

d)

4°F

49.

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)

a lever and a pulley

b)

a lever and a wheel and axle

c)

an inclined plane and a pulley

d)

an inclined plane and a wheel and axle

50.

The diagram below represents the rock cycle. According to this diagram, metamorphic rock is formed by

a)

melting and solidification

b)

burial and compaction

c)

weathering and erosion

d)

heat and/or pressure