Physical science mcqs
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Define matter.
Anything that has mass and occupies space.
True or false: Atoms are the smallest units of matter.
TRUE
Fill in the blank: Solids have a definite _______ and volume.
shape
What is density?
The mass per unit volume of a substance.
Define kinetic energy.
The energy an object possesses due to its motion.
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed.
Fill in the blank: Potential energy is stored energy based on an object’s _______.
position
True or false: Heat is a form of energy.
TRUE
What does Newton’s first law state?
An object at rest stays at rest unless acted upon by a force.
Define friction.
The resistance that one surface or object encounters when moving over another.
What is acceleration?
The rate of change of velocity of an object.
Fill in the blank: Light is a form of _______ energy.
electromagnetic
True or false: Sound travels faster in air than in water.
FALSE
What is the pH scale used for?
Measuring the acidity or alkalinity of a solution.
Define chemical reaction.
A process that leads to the transformation of one set of chemical substances to another.
Fill in the blank: Photosynthesis converts sunlight into _______.
chemical energy
What is gravity?
The force that attracts a body toward the center of the Earth.
True or false: Electrons have a positive charge.
FALSE
What is buoyancy?
The ability of an object to float in a fluid.
Define thermodynamics.
The branch of physics that deals with heat and temperature and their relation to energy.
Fill in the blank: Magnetism is a force that can attract or repel _______.
magnetic materials
What is wave frequency?
The number of waves that pass a point in one second.
True or false: Isotopes have the same number of protons but different neutrons.
TRUE
What is the atomic number?
The number of protons in the nucleus of an atom.