Science revision Flashcards
Revise for science and reveal the mystery card
What is a force?
A force is a push or pull acting upon an object.
True or False: Force is a vector quantity.
True
What is the SI unit of force?
Newton (N)
Fill in the blank: The force of gravity acting on an object is called its _____ .
weight
True or False: Friction is a force that opposes motion.
True
What type of force is gravity?
Attractive force
Fill in the blank: The _____ force is the force exerted by a surface to support the weight of an object resting on it.
normal
What is the difference between mass and weight?
Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.
True or False: Action and reaction forces act on the same object.
False
What is the force that opposes the relative motion of two surfaces in contact?
Friction
What is the relationship between force, mass, and acceleration according to Newton’s Second Law?
Force is equal to mass multiplied by acceleration (F = ma).
Fill in the blank: The force of attraction between two masses is known as _____ .
gravity
What is the effect of balanced forces on an object?
Balanced forces do not change the motion of an object.
What type of force is tension?
A pulling force transmitted through a string, rope, or cable.
True or False: A larger mass requires more force to accelerate than a smaller mass.
True
What is the gravitational force between two objects dependent on?
The masses of the objects and the distance between them.
Fill in the blank: The _____ force is the force that opposes the motion of an object through a fluid.
drag
True or False: The greater the surface area of an object, the greater the air resistance it experiences.
True
What are the three main states of matter?
Solids, liquids, and gases.
True or False: Solids have a definite shape and volume.
True.
Fill in the blank: In a liquid, particles are ______ than in a solid.
closer together but can move past each other.
What state of matter has a definite volume but no definite shape?
Liquid.
Which state of matter has particles that are far apart and move freely?
Gas.
What happens to the particles in a solid when it is heated?
They gain energy and may begin to vibrate more and eventually melt.
True or False: Gases can be compressed easily.
True.
What is the process called when a liquid turns into a gas?
Evaporation.
Fill in the blank: The particles in a gas are ______ compared to solids and liquids.
far apart.
What is the term for the change of state from solid to liquid?
Melting.
What is the term for the change of state from liquid to solid?
Freezing.
Which state of matter has the highest energy particles?
Gas.
Fill in the blank: A solid’s particles are arranged in a ______ structure.
fixed.
What is condensation?
The process by which a gas turns into a liquid.
True or False: All substances can exist in all three states of matter.
True.
What is the boiling point of water?
100 degrees Celsius at standard atmospheric pressure.
Fill in the blank: The process of a solid turning directly into a gas is called ______.
sublimation.
What do we call the temperature at which a solid becomes a liquid?
Melting point.
What is the primary characteristic of liquids?
They take the shape of their container.
True or False: In a gas, the particles are closely packed together.
False.
What is the measure of how much space a substance occupies?
Volume.
Fill in the blank: The process of a liquid becoming a gas is called ______.
boiling.
What happens to the volume of a gas when it is heated?
It expands.
What is a common example of sublimation?
Dry ice turning into carbon dioxide gas.
Fill in the blank: The particles in a liquid are ______ than those in a gas.
closer together.
What is the term for the change of state from gas to solid?
Deposition.
