Vocab
What is an isotope?
An atom with an unstable number of neutrons in the nucleus
Does a pendulum have more or less inertia on the first or final swing?
First
What is Thermodynamics?
The study of how energy moves through the universe
Do atoms try to stay in an unbalanced or balanced state?
balanced
What does pH measure?
the concentration of hydrogens ions
What is nuclear fission? Name 2 examples
A chain reaction that causes nucleuses in nearby atoms to split. Bomb and nuclear power plants
How is friction and drag the same?
What is the 2nd law of thermodynamics?
entropy (disorder and randomness)
Do atoms attract or repel opposite charges?
attract
Is the atmosphere a mixture or a compound and why?
mixture because it is not chemically bonded
What are photons?
solar cells used to generate electricity
When an object is in motion, what kind of energy does it have?
kinetic
What effect does heat have on atoms and molecules in matter?
It gives more energy causing them to accelerate
Why do we need alternatives to fossil fuels?
better for the environment/only a certain amount of fossil fuels
What do you call a substance that is neither an acid or base?
neutral
What is drag?
A force that works against an object in motion
How is inertia used in throwing a ball?
You and the ball have inertia and when your hand stops the ball will continue to move due to its inertia
How is sunlight turned into electricity?
What is a substance of at least two different elements that are chemically bonded called?
Compound
What is inertia?
Inertia is the resistance to change in motion
Does weight change how fast something falls?
NO
A propeller pulling an airplane through the air is an example of what?
thrust