WorksheetsAll Physical Science Review
Total questions: 35
Worksheet time: 18mins
Katie's teacher has given her a sample that contains a mixture of salt, sand, and iron filings. What would be the best physical property to focus on for the first step in separating the mixture?
Density
Electrical conductivity
Magnetism
Melting point
Isopropyl alcohol has a density of 0.786 grams per cubic centimeter (g/cm3). An object has a mass of 13 grams (g) and a volume of 21 cubic centimeters (cm3). What will happen when the object is placed into isopropyl alcohol?
The object will sink because it is less dense than isopropyl alcohol.
The object will float because it is less dense than isopropyl alcohol.
The object will sink because it is more dense than isopropyl alcohol.
The object will float because it is more dense than isopropyl alcohol.
The table below compares the solubility of two substances in 100 milliliters (mL) of water. Based on the table, which of the following statements is true?
The solubility of sucrose increases as more is dissolved.
The solubility of sucrose decreases if temperature increases.
The solubility of hydrochloric acid increases if more is dissolved.
The solubility of hydrochloric acid increases as temperature increases.
The formula for calculating density is D=M/V, where M represents mass and V represents volume. If the density of an unknown liquid is 1.6 g/cc, what is the mass of 800 cc of the unknown liquid in grams (g)?
0.002g
1.6g
500g
1280g
Acid reflux occurs when acid from a person's stomach escapes from the stomach and enters the esophagus, a flexible tube that leads into the stomach. Which substance would be best for neutralizing stomach acid?
a substance with a pH of 9
a substance with a pH of 5
a substance with a pH of 1
a substance with a pH of 7
Which statement best compares pure substances to mixtures?
Pure substances contain small amounts of impurities. Mixtures contain large amounts of impurities.
Pure substances must be made of two chemical materials. Mixtures can be made of only one chemical material.
Pure substances are either compounds or elements. Mixtures are homogeneous or heterogeneous combinations.
Pure substances are liquids dissolved in liquids or gases dissolved in gases. Mixtures are gases dissolved in liquids or solids dissolved in liquids.
Mixtures typically melt at different temperatures than the pure substances they are composed of. Brass is a mixture composed of copper and zinc, and it melts at temperatures between 820 degrees Celsius (°C) and 1030 degrees Celsius (°C). Why might different samples of brass melt at different temperatures?
The samples are different in size and in volume.
The samples have different shapes and masses.
The samples are composed of different proportions of copper and zinc.
The samples have the same amounts of copper and zinc melting at different temperatures.
Atomic theory describes the motion of particles in solids, liquids, and gases. Which statement best describes the particles in a given state of matter?
The particles in gases have a fixed position but can vibrate.
The particles in solids have a fixed position but can vibrate.
The particles in solids are very close to each other but they are able to move past each other.
The particles in gases are very close to each other but they are able to move past each other.
If a sample of gold were reduced to the smallest possible particles of pure gold, which statement would most accurately describe the result?
The sample would be reduced to atoms of gold.
The sample would be reduced to molecules of gold.
The sample would be reduced to protons and neutrons of gold.
The sample would be reduced to electrons and protons of gold.
Which of the following comparisons correctly describes subatomic particles?
A neutron has a neutral charge and a mass larger than the mass of an electron.
A neutron has a negative charge and a mass smaller than the mass of a proton.
An electron has a negative charge and a mass larger than the mass of a proton.
A proton has a positive charge and a mass smaller than the mass of an electron.
Fluorine (F), Chlorine (Cl), Bromine (Br), and Iodine (I) are elements in the same group on the periodic table. Why are these elements grouped together?
They all have similar properties.
They all have similar atomic masses.
They all have the same atomic radius.
They all have the same number of protons.
Which sentence correctly explains the change that occurs when ice melts?
Ice melting is a physical change, and the state of the substance remains the same.
Ice melting is a physical change, and the mass of the substance remains the same.
Ice melting is a chemical change, and the state of the substance remains the same.
Ice melting is a chemical change, and the mass of the substance remains the same.
Brian is making a cake for his friend's birthday. He combines the ingredients for the cake and then pours the batter into two pans and bakes them for 45 minutes in the oven. While the pans are in the oven, he combines butter, sugar, and milk and mixes them together to make the icing. What type of changes created the cake and the icing?
Both the icing and the cake are formed by physical changes.
Both the icing and the cake are formed by chemical changes.
The icing is formed by a chemical change and the cake is formed by a physical change.
The cake is formed by a chemical change and the icing is formed by a physical change.
A chemistry student conducted several different procedures.Which of the following procedures best demonstrates the law of conservation of mass?
using filter paper to separate 2 grams of solid powder from 10 grams of water
burning 2 kilograms of wood from a pine tree leaves 0.4 kilogram of ash and soot
evaporating sugar water leaves 5 grams of sugar and turns the water into water vapor
combining 2 grams of copper and 4 grams of sulfur to make 6 grams of copper sulfate
Cell phones, radar, and televisions are examples of devices that function by using electromagnetic waves Why are electromagnetic waves useful for cell phones, radar, and television signals?
Electromagnetic waves cannot be changed.
Electromagnetic waves can travel long distances.
Electromagnetic waves travel at different speeds.
Electromagnetic waves are harmful at high frequencies.
Some planetary images and satellite photographs are made using visible light. Other images are made with radiation from the non-visible portions of the electromagnetic spectrum. Why do scientists study images made with parts of the electromagnetic spectrum other than visible light? Why do scientists study images made with parts of the electromagnetic spectrum other than visible light?
These images show important data from optical telescopes.
These images reveal information that visible light does not show.
These images are the only way to observe galaxies beyond our own.
These images are the only way to observe space from Earth's surface
Sunlight is composed of energy that is visible to humans and energy that is not visible to humans. Which statement describes how the visible energy from the Sun is different from the non visible energy?
It travels at a different speed through space
It travels a different distance through space
It has different wavelengths
It has different amplitudes
Miners are deep below ground, working on a metal pipe in the mineshaft that goes up to the surface. The workers bang on the pipe and yell out loudly to talk to one another. If a worker is coming down the mineshaft to join the team, what will he hear first?
He will not hear anything until he gets very close because sound waves travel very slowly
He will hear the workers yelling first because sound waves travel through air faster than they travel through metal.
He will hear the banging on the pipe first because sound waves travel through metal faster than they travel through air.
He will hear banging on the pipes and the workers yelling at the same time because sound waves travel at the same speed through metal and air.
Which statement best explains why an object appears green in sunlight?
The object absorbs most white light and refracts most green light.
The object refracts most white light and absorbs most green light.
More green light is absorbed while more red and blue light is reflected.
More green light is reflected while more red and blue light is absorbed.
A farmer pulls the cord on the bell on his barn to signal to everyone that it is time to eat. Which of the following factors would most impact the speed of the sound waves coming from the ringing bell?
the type of metal that the bell is made of
the force that the bell was struck with to start the vibrations
the direction of the waves as the sound vibrates away from the bell
the temperature and medium through which the sound is traveling
In science class, you listen to the sound of a tuning fork after it is hit against a cork. When you place the tuning fork to one end of a piece of wood and your ear to the other, you notice that the sound becomes high pitched. What happened to the sound waves as they went through the wood?
They slowed, due to a high pitch echo
They slowed, due to more matter in the wood
They sped up, creating a higher frequency
They sped up, creating a higher wavelength
A variety of energy transformations occur in different situations. Which of the following statements involves the change from chemical to electromagnetic to mechanical to sound energy?
A charcoal grill feels hot.
A basketball player throws a basketball.
A cell phone plays a video from YouTube.
The Sun heats the concrete of the sidewalk.
A student observes a beaker of room temperature water resting on a table. She states that the beaker of water does not have any energy. Which statement below is accurate regarding her observation?
She is correct because the beaker of water is not moving.
She is incorrect because the beaker of water has thermal energy.
She is incorrect because all water contains hydrogen and oxygen.
She is correct because the beaker of water is at room temperature.
Which of the following statements is true about the law of conservation of energy?
The law of conservation of energy explains the movement of objects due to gravity.
The law of conservation of energy describes how energy is transformed in systems.
The law of conservation of energy describes why an object’s mass increases its force.
The law of conservation of energy explains why moving objects possess kinetic energy.
Which of these statements best describes how energy is transferred when an object experiences friction?
Friction changes mechanical energy to light energy.
Friction changes mechanical energy to chemical energy.
Friction changes mechanical energy to electrical energy.
Friction changes mechanical energy to heat energy.
Barbara is conducting an experiment to observe heat flow. She places one piece of metal in a freezer at -18 degrees Celsius and a second piece of metal in an oven at 200 °C. After 2 hours, she takes the metal pieces out of the freezer and oven and places them both in the same beaker of boiling water for two minutes. Which of the following best describes how some of the heat will initially move in this system?
Heat will flow from the frozen metal into the hot metal.
Heat will flow from the boiling water into the hot metal.
Heat will flow from the boiling water into the frozen metal.
Heat will flow from the frozen metal into the boiling water.
A group of students are studying the movement of thermal energy. The teacher asks the students to place the palms of their hands flat on their tabletops and describe what is happening. Which statement below best describes why the table feels cold?
The table feels cold because it is at a lower temperature than the air in the room.
The table feels cold because it is solid, and solids hold thermal energy better than air.
The table feels cold because it is at a lower temperature than the students' hands, and thermal energy is being transferred into the table.
The table feels cold because it is at a lower temperature than the students' hands, and thermal energy is being transferred into the students' hands.
Farah is sitting on the beach on a sunny day. She feels the heat from the Sun on her face. What type of heat transfer is Farah experiencing?
compaction
conduction
convection
Radiation
Some students were conducting an experiment where they were measuring the energy of a ball as it rolled down a ramp. According to their calculations, the total energy decreased. Which statement is the best explanation for this loss of energy?
The missing energy was destroyed.
The missing energy was lost as heat due to friction.
the students conducted their measurements incorrectly; the energy totals should have been the same.
The total amount of energy always decreases as it is converted from one type of energy to the next and is to be expected.
Two objects of equal mass are floating in space at a distance of 2.5 meters (m) apart. Which of the following will produce the greatest increase in the gravitational force between the two objects?
doubling the mass of both objects
reducing the volume of both objects
doubling the density of one of the objects
reducing the mass of both objects by half
Some trains use a system known as maglev instead of wheels. In one version of maglev, magnets inside the track act on magnets inside the train, and when the train is at full speed it never touches the ground. The magnets never touch, but the force between them can be changed by adjusting the amount of current flowing through the train’s control system. What force do these maglev trains reduce by using magnets?
elastic
electrical
friction
tension
Two positively charged objects are separated by a small distance. If the objects are then moved three times farther apart from each other, what happens to the electrical force between the objects?
The force of attraction increases.
The force of attraction decreases.
The force of attraction stays the same.
The force of attraction becomes a force of repulsion
An astronaut leaves Earth's surface and begins orbiting Earth. How will his departure from Earth affect his mass and weight?
His mass and weight will remain constant.
His mass will increase; his weight will increase.
His mass will decrease; his weight will decrease.
His mass will remain constant; his weight will decrease
A student measures the distances traveled by two objects in meters (m) over the course of 50 seconds (s) and writes the results in the following table. Which of the following is true about these objects?
Both objects increased their speed as they traveled.
Object 1 would have a steeper slope than Object 2 on a distance-time graph.
Both objects traveled the same distance.
Object 1 and Object 2 would have a horizontal line on a distance-time graph
A person sitting in a rolling chair at rest throws a basketball forward. Since the person and the rolling chair have a greater mass than the basketball, how will the person and the rolling chair respond?
They will have the same forward momentum as the basketball.
They will move backward at a lower speed than the basketball moves forward.
They will move backward at a higher speed than the basketball moves forward.
They will travel the same distance as the basketball travels but in the opposite direction.
