Forces and Motion
This law explains that an object at rest stays at rest unless acted on by an unbalanced force.
Newton's First Law
What are the three main subatomic particles?
Protons, neutrons, and electrons
What type of wave requires a medium to travel?
Mechanical wave
What type of force acts at a distance without direct contact?
Field force
What is the main source of energy for stars?
Nuclear fusion
What happens to acceleration when force increases but mass stays the same?
Acceleration Increases
Which subatomic particle has a negative charge? Where can it be found?
Electron; located in the electron cloud
What happens to wave speed when it moves from one medium to another?
The speed changes
What are the two types of electric charges?
Positive and negative
What gas is primarily fused in stars to produce energy?
Hydrogen
This force opposes motion between two surfaces in contact.
Friction
Where is most of the mass of an atom located?
In the nucleus
What is the distance between two wave peaks called?
Wavelength
What happens when like charges interact?
They repel
What determines the color of a star?
Temperature
What is the net force if two forces of 10 N act in opposite directions?
0 N (balanced forces)
What determines the identity of an element? what is it called?
Number of protons (atomic number)
What happens to a wave when it enters a new medium at an angle and bends?
Refraction
What type of force is responsible for magnets attracting or repelling?
Magnetic force
What stage comes after a star like the Sun runs out of fuel and expands?
Red Giant
What is the relationship between mass and acceleration when force is constant?
As mass increases, acceleration decreases
Atoms of the same element with different numbers of neutrons are called what?
Isotopes
Which type of wave can travel through empty space?
Electromagnetic wave
What is the region around a charged object where forces can be felt called?
Electric field
What tool do scientists use to study the composition of stars?
Spectroscope (or spectroscopy)