Waves
What is a wave?
A disturbance that transfers energy from place to place.
What is force?
The push or pull on an object with mass that causes it to change velocity.
What is a chemical reaction?
A process that leads to the chemical transformation of one set of chemical substance to another.
What are the two ends of the magnet called?
North pole and south pole.
What causes a phase change?
A phase change is caused by the addition or subtraction of heat energy.
What is wavelength?
Wavelength is the distance between two identical adjacent points in a wave.
Matter is pulled to the ground by:
a. space
b. gravity
c. air
d. soil
b. gravity
All chemical reactions in living things take place in:
a. in dry conditions
b. in water solutions
c. outside a membrane
d. inside a membrane
d. inside a membrane
What objects do magnets stick to?
They stick to strong metals such as iron and cobalt.
What is the change of state from liquid to solid called?
What are all sound waves?
They are all compressional.
What does it mean to accelerate?
It means to increase speed.
How are solutions and mixtures alike?
Two or more substances are physically combined.
What does magnetic force act through?
What happens to particles when they are heated?
They speed up and spread out.
Whats the difference between a transverse wave and a longitudinal wave?
Transverse waves are waves vibrating at right angles to the direction of its propagation. Longitudinal waves are waves vibrating in the direction if its propagation.
How is Newtons Third Law of Motion stated?
For every action, there is an equal and opposite reaction.
Molecules must collide with their energy, so chemical bonds can break.
What is a magnetic needle that is free to turn?
A compass
What are the molecules responsible for during a phase change?
To rearrange the matter into a new state.
What are the properties of waves?
What does the strength of force of gravity depend on?
The masses of the objects and the distance between them.
What is a substance that dissolves in another substance?
Solute
What does the north pole of the compass needle point towards?
It points towards Earth's north pole in the Antarctica Circle.
Do all phase changes require energy to be added or taken away?
True