NEW
Font size
Worksheets8th Grade Physical Science Review
Total questions: 20
Worksheet time: 10mins
What is a chemical reaction?
A chemical reaction is a mathematical equation.
A chemical reaction is a physical change in matter.
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
A chemical reaction is a biological process.
Explain the Law of Conservation of Energy.
Energy can neither be created nor destroyed, only converted from one form to another.
Energy can be destroyed but not created
Energy can only exist in one form
Energy can be created but not destroyed
Define force and provide an example.
Force is only applicable in outer space.
Force is a form of light.
Force is a push or pull that can change the state of motion of an object. For example, when a person pushes a car to move it forward, they are applying a force to the car.
Force is a type of energy that objects possess.
How do waves transfer energy?
Through the vibration of particles in the medium
Through the levitation of particles in the medium
Through the stillness of particles in the medium
Through the rotation of particles in the medium
Describe the structure of an atom.
The structure of an atom consists of protons and electrons only
Atoms have a single energy level where all particles are located
The structure of an atom includes a nucleus composed of protons and neutrons, with electrons orbiting around the nucleus in specific energy levels.
The nucleus of an atom is made up of electrons and protons
What are the properties of matter?
Taste, smell, sound
Length, temperature, speed
Mass, volume, density, physical state
Weight, shape, color
What happens during a chemical reaction?
Only physical changes take place
No changes occur in the atoms
Atoms are created from scratch
Chemical bonds are broken and new bonds are formed, leading to the rearrangement of atoms.
How is energy transferred in a closed system?
Via telekinesis, photosynthesis, and fermentation.
Through processes such as conduction, convection, and radiation.
By telekinesis, telepathy, and teleportation.
Through photosynthesis, respiration, and fermentation.
What is the relationship between force and motion?
Newton's second law of motion describes the relationship between force and motion.
Force and motion are unrelated concepts.
Force always results in motion.
Motion is not affected by force.
How do electromagnetic waves differ from mechanical waves?
Electromagnetic waves have a higher frequency than mechanical waves.
Electromagnetic waves do not require a medium to travel through, while mechanical waves do.
Electromagnetic waves are longitudinal waves, while mechanical waves are transverse waves.
Electromagnetic waves travel faster than mechanical waves.
What are the different states of matter?
solid, liquid, gas, vapor
solid, liquid, gas, plasma
solid, liquid, gas, condensate
solid, liquid, gas, energy
Explain the concept of activation energy.
Activation energy is the energy stored in a chemical compound.
Activation energy is the minimum amount of energy required to start a chemical reaction.
Activation energy is the energy required to stop a chemical reaction.
Activation energy is the energy released during a chemical reaction.
How does temperature affect the rate of a chemical reaction?
Temperature causes molecules to stop moving, halting the reaction
Temperature affects the rate of a chemical reaction by increasing the kinetic energy of molecules, leading to more frequent and energetic collisions.
Temperature has no effect on the rate of a chemical reaction
Temperature decreases the rate of a chemical reaction
What is the role of friction in forces and motion?
Friction always results in smooth movement.
Friction accelerates motion between two surfaces in contact.
Friction opposes motion between two surfaces in contact.
Friction has no effect on forces and motion.
Describe the behavior of waves when they encounter different mediums.
Waves can be absorbed and reflected when they encounter different mediums.
Waves can be refracted and absorbed when they encounter different mediums.
Waves can be transmitted and reflected when they encounter different mediums.
Waves can be reflected, refracted, absorbed, or transmitted when they encounter different mediums.
How do the properties of matter change in different states?
The properties of matter change in different states due to sound frequencies.
The properties of matter change in different states due to gravitational pull.
The properties of matter change in different states due to the arrangement and movement of particles.
The properties of matter change in different states due to color variations.
What is the role of catalysts in chemical reactions?
Catalysts slow down reactions by increasing activation energy.
Catalysts have no effect on chemical reactions.
Catalysts change the products of reactions.
Catalysts speed up reactions by lowering activation energy.
Explain the concept of potential and kinetic energy.
Potential energy is energy that is always in motion
Kinetic energy is stored energy waiting to be used
Potential energy is stored energy that can be converted into kinetic energy when the object is in motion.
Potential energy is the energy of an object in motion
How do balanced and unbalanced forces affect motion?
Balanced forces cause objects to accelerate, while unbalanced forces keep objects at rest.
Balanced forces always result in deceleration, while unbalanced forces result in acceleration.
Balanced forces keep an object at rest or moving at a constant velocity, while unbalanced forces cause an object to accelerate or decelerate.
Unbalanced forces keep an object at rest or moving at a constant velocity, while balanced forces cause an object to accelerate or decelerate.
What is the electromagnetic spectrum and how is it used in everyday life?
The electromagnetic spectrum is a type of weather forecasting tool
The electromagnetic spectrum is a type of musical instrument
The electromagnetic spectrum is only used in scientific research
The electromagnetic spectrum is the range of all types of electromagnetic radiation used in various applications in everyday life.
