science final 2
Terms
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- states of matter
- the physical forms in which a substance can exist, states include solid, liquid, gas, and plasma
- solid
- the state in which matter has a definite shape and volume
- absorption
- the transfer of energy carried by light waves to particles in matter
- acceleration
- the rate at which velocity changes; an object accelerates if its speed changes, its its direction changes, or if both its speed and direction change
- activation energy
- the minimum amount of energy needed for substances to react
- acid
- any compound that increases the # of hydrogen ions when dissolved in water and whose solution tastes sour and can change the color of certain compounds
- physical science
- the study of matter and energy
- scientific method
- a series of steps that scientists use to answer questons and solve problems
- technology
- the application of knowledge, tools, and materials to solver problems and accomplsih tasks
- observation
- any use of the senses to gather info.
- hypothesis
- a possible explanation or answer to a question
- data
- any pieces of info. acquired through experimentaion
- theory
- a unifying explination for a broad range of hypothesis and observations that have been supported by testing