Forces
What is the definition of a force?
A push or a pull
What are the 3 states of matter?
Solid, liquid, gas
What is a chemical change?
A change to the chemical composition of an object
What is the definition a wave?
What are the 2 main types of energy?
Potential and Kinetic
What are the 2 types of forces?
Contact and non contact
What is the definition of matter?
Anything that has mass and takes up space
Which one would represent the chemical change?
1. Toasting a marshmallow
2. Breaking a stick
3. Crumpling up a piece of paper
4. Freezing water
1. Toasting a marshmallow
Through sound waves vibrating the matter.
What is the definition of kinetic energy?
What is Newton's First Law
An object at rest stays at rest, an object in motion stays in UNLESS otherwise acted on.
What is an indicator of a chemical change?
Change in pH, gas production, burning something, change in color
What wave type is the shortest wavelength?
Gamma
What are the 3 types of potential energy?
Gravitational, chemical, and elastic
What is an example of a non contact force?
What is the difference between a chemical and a physical change?
Physical changes can be undone, chemical changes cannot.
What are the 2 sides of a chemical equation?
Why are UV rays dangerous
They have a short wavelength, high frequency, and can cause skin cancer.
Acceptable answers include: mass, gravity, height
How do you calculate force?
Force = mass times acceleration
What happens as water vapor becomes ice
The water molecules get slower and get closer together.
How do you show that chemical equations are balanced?
There are an equal amount of each type of each atom on both sides
They break all of the CO2 in the atmosphere and can cause there be excess heat.
What is the formula for kinetic energy?
1/2mv2