SCIENCE cp Flashcards
What is sound?
Sound is a form of energy that travels in waves through a medium such as air, water, or solids.
True or False: Sound can travel through a vacuum.
False
What is the primary theory for the formation of the Moon?
The Giant Impact Hypothesis suggests that the Moon formed from the debris left over after a Mars-sized body collided with Earth.
Fill in the blank: The Moon’s surface is covered with ______.
regolith
What particle is found in the nucleus of an atom and has a positive charge?
Proton
What is the atomic number of an element?
The atomic number is the number of protons in the nucleus of an atom of that element.
Which of the following is a noble gas? A) Oxygen B) Helium C) Iron
B) Helium
What is the formula for calculating electrical resistance?
Resistance (R) is calculated using Ohm’s Law: R = V/I, where V is voltage and I is current.
True or False: Voltage is the measure of the flow of electric charge.
False
What is the unit of voltage?
Volt
What is the role of a resistor in a circuit?
A resistor limits the flow of electric current in a circuit.
Fill in the blank: The carbon cycle describes the process by which carbon ______.
is exchanged among the atmosphere, land, water, and living organisms.
What is the main greenhouse gas involved in the carbon cycle?
Carbon dioxide (CO2)
Which element is the basis for organic chemistry?
Carbon
What is the significance of the carbon cycle in the environment?
The carbon cycle is crucial for regulating Earth’s climate and supporting life by cycling carbon through various forms.
True or False: Atoms of the same element can have different numbers of neutrons.
True
What is an ion?
An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.
What is the main difference between AC and DC electricity?
AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.
Fill in the blank: The __________ effect is the increase in frequency of sound as the source moves towards the observer.
Doppler
What is the speed of sound in air at room temperature?
Approximately 343 meters per second (m/s)
What are the three main types of circuits?
Series, parallel, and series-parallel circuits.
True or False: In a series circuit, the current is the same through all components.
True
What does the term ‘resistivity’ refer to?
Resistivity is a material’s ability to resist the flow of electric current, dependent on the material’s properties.
What is the primary source of energy for the carbon cycle?
The Sun
