Science and Engineering Practices
What is the WorldWide accepted definition of sustainability.
Meeting the needs of the current generation without compromising the ability of future generations to meet their needs.
What do you call it when all forces on a object are equal
Equilibrium
What causes sound wave?
What is a physical property..
Any property that can be observed or measured without changing the substance.
What is friction
A force that resists motion
What is input?
Anything that flows into a system.
What is energy transformation
When energy changes from one form to another
Describe an insulator
A substance that does not easily transfer energy.
Why do elements bond?
to become stable
What do you call the substance formed in a reaction?
Products
What are the two parts of a hypothesis
Claim
Reasoning
What is the law of the conservation of energy
Energy cannot be created or destroyed it transfers or transforms
Describe a transverse wave
A wave whose oscillation is perpendicular to the direction of motion
What are the parts of atom and their charges?
Protons (+)
Electrons (-)
Neutrons ( no charge)
What do you call substances used in reactions?
Reactants
What is a constraint
Anything that the possible solutions to a problem
What is the relationship between forces and energy
Forces transfer or transform energy
Describe an analog signal
The whole contionous wave
What does the state of matter depend on
The state of matter depends on the kinetic energy in atoms/ molecules in the substance.
Two components or a good written observation
What happens
When/Where it happens
What are the four criteria for a good procedure
1. Numbered 2. Complete 3. States to record data 4. States to repeat trials
Which non-contact forces can be attractive or repulsive?
Electrostatic
magnetic
What are the three properties of materials that interact with light and what effect do they have it?
Transparent: Light passes through
Translucent: Some reflects some absorbs, some passes through
Opaque: All is absorbed or reflected
What are the two characteristics of a mixture?
•A combination of two or more substances that are not chemically combined
•retain their individual properties.
Describe a digital signal
Transmission of wave samples at time interval convertied into one’s and zero’s