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Worksheets8th Science Practice GMAS
Total questions: 42
Worksheet time: 21mins
One difference between mixtures and pure substances is that
mixtures can be physically separated.
mixtures are made of one type of atom.
pure substances have no chemical bonds.
pure substances can be physically separated.
A __________ has distinct properties and composition that never vary.
solution
molecule
pure substance
heterogeneous mixture
Relate the temperature of a gas to the kinetic energy of its particles.
As the temperature extends, the kinetic energy of the particles decreases.
As the temperature increases, the kinetic energy of the particles increases.
As the temperature decreases, the kinetic energy of the particles increases.
As the temperature intensifies, the kinetic energy of the particles decreases.
When the sun heats up the surface of a puddle of water, the water
condenses
evaporates
infiltrataes
precipitates
Maggie recorded her observations of the baking soda used in lab today. Which observation indicated a chemical property of the baking soda?
odor
color
texture
bubbles
Grace is given a piece of wood, an iron nail, and a styrofoam cup. She puts these objects into a bucket of water and observes that the nail sinks to the bottom, the wood floats just under the surface, and the cup floats on top of the water. What property is being demonstrated by this experiment.
density
melting point
solubility
temperature
The images show two commonly observed changes.
Picture I shows a chemical change, because a new substance is formed.
Picture II shows a chemical change, because a new substance is formed.
Picture I shows a chemical change, because the same substance changes form.
Picture II shows a chemical change, because the same substance changes form.
Which of these is a physical property?
boiling point
flammability
reactivity
toxicity
Helium, neon, and argon are examples of
metals
metalloids
noble gases
transition metals
Which element listed is the MOST reactive?
Fe (iron)
Al (aluminum)
Li (lithium)
O (oxygen)
Which chemical equation is balanced and reflects the Law of Conservation of Matter/Mass?
MnO + HO →MnO + 2OH
MnO2 + H2O => Mn2O3 + OH
2Mn4O + H2O => Mn2O3 + 2OH
2MnO2 + H2O => Mn2O3 + 2OH
A balloon is filled with water. The balloon is heated and begins to expand. The water inside begins to turn into steam. What will happen to the mass of the balloon?
The mass will stay the same.
The mass will increase since gases do not have mass.
The mass will increase since liquid will have more mass.
The mass will decrease since the liquid will take up less space.
What type of wave is being described?
· sound
· parallel
· mechanical
· not a vacuum
· needs a medium
· compressions and rarefaction
compaction
electromagnetic
longitudinal
transverse
Two people each hold the end of a rope and create waves by moving their arms up and down. This wave is best classified as a transverse wave because ___________
both the rope particles and the wave are moving in the same direction.
the wave is moving up and down as the particles of the rope move horizontally.
the wave is moving horizontally as the particles of the rope move up and down.
the wave is moving in a parallel direction with the motion of the person's arms.
Low-frequency red light is used in dark rooms because it does not expose the film. This is because the red light has a low
amplitude
energy
intensity
wavelength
Limiting contact between gamma rays and healthy tissue is important because
gamma rays are low frequency and may disturb mitochondria.
gamma rays are high energy and may cause damage to healthy cells.
gamma rays have long wavelengths and may heat up healthy cells.
there is no risk associated with exposure of healthy cells to gamma rays.
What type of electromagnetic wave made TV technology possible?
microwaves
radio waves
seismic waves
ultraviolet waves
Houses with carpet are much quieter than houses with tile or hardwood floors because of sound wave
absorption
diffraction
reflection
refraction
A piece of paper reflects the wavelengths of red-orange-yellow-green-blue-indigo-violet. What color will the paper appear to human eyes?
black
brown
green
white
By now, you know that sound is produced by vibrations. These vibrations can travel through solids, liquids, and gases, but not through ______________.
empty space
granite rock
living objects
the center of the earth
Compare the sounds produce by wave A and wave B. The human ear would hear
wave A as a louder sound than wave B.
wave A as a higher pitched sound than wave B.
wave A and B with the same pitch, but wave A as louder.
wave B has a louder and higher pitched sound than wave A.
What do a prism, a magnifying glass, a microscope, and eyeglasses ALL have in common?
They are opaque.
They refract light.
They reflect light.
They are translucent.
Explain how the mass of a bowling ball that has been rolled down the lane affects the kinetic energy.
The kinetic energy does not depend on the mass of the bowling ball.
The kinetic energy is increasing proportional to the mass of the bowling ball.
The kinetic energy is decreasing proportional to the mass of the bowling ball.
The kinetic energy is increasing proportional to the square of the mass of the bowling ball.
How can we increase the potential energy of the car?
Strap a boulder to the car so that it weighs more.
Keep the length of the hill at 50 m but only 5 m tall.
Take the interior out of the car so that the car has less mass.
Keep the hill at 10 m tall but increase the length of the hill so that the car has farther to roll.
Based on the diagram of a roller coaster track, what statement is true?
A car at point A has the most kinetic energy.
A car at point B has the most potential energy.
A car at point B has more kinetic energy than the car at point D.
A car at point D has more kinetic energy than the car at point B.
A roller coaster at an amusement park goes from the top of a tall hill to the bottom. During this time, the roller coaster
gains both potential and kinetic energy
loses both potential and kinetic energy
loses kinetic energy and gains potential energy
loses potential energy and gains kinetic energy
In an automobile engine, fuel is burned to convert ________energy into heat energy. The ________energy is then changed into ________energy.
heat → chemical → mechanical
chemical → mechanical → heat
mechanical → heat → chemical
chemical → heat → mechanical
Which example shows electrical energy being transformed into heat energy?
burning a wax candle
a small toaster oven toasts a bagel
rubbing two sticks together
sunlight heating a metal door
The process of heat radiation is the ONLY method of heat transfer that can occur _____________
under water
through space
through the air
through a solid
Which would be best categorized as heat transfer by conduction?
Wearing a white shirt to stay cool on a summer day.
Warming your body under the sun in summer
Feeling the heat from a light bulb with your hand when touching the bulb.
Feeling the heat from a light bulb while holding your hand from 6 inches away.
An astronaut travels to the moon. What is true regarding her mass and weight?
Her mass and weight are greater on Earth.
Her mass and weight are the same on the moon as on Earth.
Her mass is the same on the moon and Earth, but her weight is greater on Earth.
Her weight is the same on the moon and Earth, but her mass is greater on Earth.
Maglev trains, like the one shown in the picture, use magnet fields to travel up to 600 miles per hour. Magnets on the bottom of the train and on the tops of the rails have similar magnetic poles. Based on properties of magnets, how do these magnets affect the train?
The two magnetic fields repel each other, causing the train to levitate, or hover, above the rails.
The powerful magnets greatly reduce the force of gravity, resulting in less friction and greater speed.
The train is able to stop immediately because the magnets on the rails attract the magnets on the train.
Maglev trains have extremely powerful magnets, greatly decreasing the force of gravity and allowing them to float.
You rub a balloon on your head and it becomes negatively charged. The balloon will be MOST attracted to
a piece of metal
positively charged hair
the neutrally charged wall
another negatively charged balloon
Looking at the electroscope, describe how you can cause the two leaves at the bottom to repel each other and stay that way.
Bring a positive and negative object near the top.
Bring a negative object near the top.
Bring a positive object near the top.
Touch the electroscope with any charged object.
What could you do to increase the number of paper clips an electromagnet picks up?
make the wire longer
remove the nail from the center of the wire
increase the number of loops of wire around the nail
spread the loops of wire apart on the nail so they do not touch
The basic concept of how a simple motor works is explained by which statement?
When a fan blows on a wire, it causes it to spin, creating a force.
When a fan blows on a wire, it causes it to spin, creating an electrical current.
When a wire that carries electrical current is placed in zero gravity, the wire experiences a force.
When a wire that carries electrical current is placed in a magnetic field, the wire experiences a force.
Which car is accelerating?
a car that is unmoving
a car that rounds a curve at a constant speed
a car that travels in straight line at a constant speed
a car that is set to a constant speed of 60 miles per hour
A graph here shows the displacement of two walkers over time. Walker 1 is graphed in red while walker 2 is graphed in blue. Which statement is supported by the information in the graph?
Both walkers had the same speed overall.
Both walkers had reached the same distance at ten seconds.
Walker 1 moved faster overall than walker 2 by the end.
Walker 2 moved faster overall than walker 1 by the end.
The image above shows two opposite forces acting on a rolling cart, what can we say is true about the effect of the forces on the cart?
It cannot be determined without knowing which man is stronger.
The forces are balanced and the cart will not move.
The forces are unbalanced, and net force on the cart moves it to the left.
The forces are unbalanced, and net force on the cart moves it to the right.
A book rests motionless on a table. What force arrow is missing from this free body diagram?
mass
normal
resistance
tension
A cup of coffee sits on the dashboard of an automobile. The car goes around a sharp curve. Even though you hold the cup still, coffee still splashes out.
This can best be explained due to...
density
friction
gravity
inertia
Imagine you are on the top of a mountain with four basketballs. The mass of the four basketballs are 100 kilograms, 200 kilograms, 300 kilograms, and 400 kilograms. If the basketballs rolled down the hill, which one would supply the greatest force at the bottom of the mountain?
100 kg basketball
200 kg basketball
300 kg basketball
400 kg basketball
