praxis 5005 exam Physical Science, matter, energy, motion
No description yet. This curated deck is ready for daily study.
Card preview (24)
What is the definition of matter?
Matter is anything that has mass and occupies space.
True or False: Energy can be created and destroyed.
False: Energy cannot be created or destroyed, only transformed.
Fill in the blank: The three states of matter are solid, liquid, and _______.
gas
What is the law of conservation of energy?
The law states that energy cannot be created or destroyed, only converted from one form to another.
What is kinetic energy?
Kinetic energy is the energy of an object due to its motion.
Which of the following is a form of potential energy? A) Thermal B) Gravitational C) Kinetic
B) Gravitational
What is the formula for calculating kinetic energy?
The formula is KE = 1/2 mv^2, where m is mass and v is velocity.
True or False: Temperature is a measure of the average kinetic energy of particles in a substance.
True
What is the primary difference between speed and velocity?
Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes direction.
Fill in the blank: The unit of force in the SI system is the _______.
Newton
What does Newton’s first law of motion state?
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.
Which of the following is NOT a type of energy? A) Chemical B) Nuclear C) Magnetic D) Thermal
C) Magnetic
What is the definition of acceleration?
Acceleration is the rate of change of velocity of an object.
True or False: In a vacuum, all objects fall at the same rate regardless of their mass.
True
What is the formula for calculating gravitational potential energy?
The formula is PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.
Fill in the blank: Energy that is stored in an object due to its position or arrangement is called _______.
potential energy
What is the difference between a conductor and an insulator?
A conductor allows the flow of electric current, while an insulator resists it.
Which of the following best describes motion? A) Change in position over time B) Change in energy C) Change in temperature
A) Change in position over time
What is inertia?
Inertia is the property of an object to resist changes in its state of motion.
True or False: Work is done when a force causes an object to move.
True
What is the unit of work in the SI system?
Joule
What is the relationship between mass and energy according to Einstein’s equation?
E = mc^2, which shows that mass can be converted into energy.
Fill in the blank: The measure of the average kinetic energy of particles in a substance is known as _______.
temperature
What is the principle of conservation of momentum?
The total momentum of a closed system remains constant if no external forces act on it.