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Worksheets2nd Semester Review
Total questions: 38
Worksheet time: 19mins
If a bicyclist travels 30 kilometers in two hours, her average speed is
30 km/h
60 km/h
15 km/h
2 km/h
In an experiment, which variable may change in response to the variable that is deliberately changed?
The constant variable
The dependent variable
The experimental variable
The independent variable
Which classification level is broader than the kingdom level?
order
class
family
domain
What is the gravitational potential energy of an object?
The energy it has because of its height
The energy it has because it is moving
The energy it has because of its shape
The energy it has because of its chemical makeup
A change in matter that produces one or more new substances is a
natural change
physical change
chemical change
break-down change
Table salt and water are examples of
atoms
elements
mixtures
substances
Which form of energy is described as the total amount of kinetic and potential energy of the particles in an object?
electromagnetic energy
mechanical energy
nuclear energy
thermal energy
In the laboratory, volumes of liquid are usually measured with a(n)
electrode
scale
triple-beam balance
graduated cylinder
One characteristic used to place organisms into kingdoms is
how they move
where they live
their ability to make food
their ability to reproduce
Which of the following examples of a wheel and axle most likely has the greatest mechanical advantage?
key
doorknob
screwdriver
steering wheel
Which form of energy do you get from eating peanut butter and jelly sandwiches?
electromagnetic energy
electrical energy
chemical energy
nuclear energy
Which statement describes an accelerating object?
The object speeds up
The object slows down
The object changes direction
All of the above
What is the tendency of an object to resist a change in motion?
weight
gravity
inertia
orbital velocity
When you rub your hands together on a cold day, you use friction to transform
mechanical energy into thermal energy
thermal energy into nuclear energy
nuclear energy into electrical energy
electrical energy into electromagnetic energy
What does it mean when two objects are said to exert a mutual force of attraction?
each takes turns attracting the other
they attract each other at the same time
a third object takes turns attracting each of them
a third object attracts them both at the same time
The more classification levels that two organisms share,
the closer together on Earth they live
the easier it is to tell them apart
the more characteristics they have in common
the more distantly related they are
What do the inner planets have in common?
They are small and dense, none have an atmosphere.
They are small and dense, most have atmosphere.
They are large and dense, none have atmospheres.
They are large and dense, most have atmospheres.
Which of the following is an example of a physical property?
a nail rusting
table salt melting
a camp fire burning
a silver spoon tarnishing
What is the distance traveled per unit of time for an object?
the object's slope
the object's speed
the object's velocity
the object's acceleration
How does an inclined plane work?
A small input force exerted over a long distance.
A large output force is exerted over a long distance.
The input force is exerted in the direction opposite to the output force.
The input force is in the direction of the output force, but is larger.
What are the two factors that affect an object's kinetic energy?
mass and shape
shape and speed
mass and speed
speed and position
The measurement of how much mass is contained in a given volume is called
weight
melting point
boiling point
density
In science, a fact is
not testable
the same as the variable
a strong hypothesis
a confirmed observation
The speed of an object at a given instant in time is called
total speed
average speed
constant speed
instantaneous speed
Taxonomic keys can be used to help determine the
size of organisms
needs of organisms
identity of organisms
behavior of organisms
What is the hardest known mineral?
talc
quartz
diamond
gold
Fossil fuels are considered nonrenewable resources because they
burn so quickly
are in such high demand
take hundreds of millions of years to form
pollute the air
In physical science, a push or a pull is called a(n)
force
accleration
inertia
motion
A substance is a single kind of matter that always has a specific composition. Based on this definition, which of the following is an example of a substance?
air
paper
plastic
water
A chemical change must have which of the following results?
energy is released
the substance changes state
the substance changes its form and shape
a new substance with different properties forms
One morning, Gina wakes up and sees that the grass and road outside of her window are wet. She states that it probably rained last night. What skill did Gina use to make her statement?
classifying
inferring
making models
predicting
The energy an object has due to its motion is called
gravitational energy
kinetic energy
mass energy
potential energy
One example of a chemical change is
filtering a mixture
burning wood
boiling water
crushing a can
Which of the following is a method that can be used to increase the energy efficiency of a home?
fixing a leaking faucet
adding insulation to the walls
turning off lights when leaving a room
lowering the temperature setting on a water heater
Germanium is a shiny, brittle, hard element that is used to make semiconductors. Based on its properties, how is Germanium classified?
it's an alloy
it's a metal
it's a nonmetal
it's a metalloid
Moving water can be used to produce eletricity because
all forms of energy can be transformed into other forms
energy can be transformed into power
potential energy can be transformed into kinetic energy
chemical energy can be transformed into mechanical energy
Fireworks exploding in the sky and giving off light are an example of a(n)
endothermic change
exothermic change
physical change
change in mass
The force that pulls falling objects toward Earth is called
gravity
free fall
acceleration
air resistance
