Click to listen Early atmosphere ~4.5 billion years ago Mostly Hydrogen and Helium Escaped into space Outgassing of water vapor and CO2 created a secondary.
Matter and Change. Chemistry is… …the study of the composition, structure, and properties of matter and the changes it undergoes.
Ch2 Minerals
Biology ps1
Observations ◦ Existing knowledge – ask a question ◦ Do some background research ◦ Qualitative data – information that describes color, odor, shape.
Anything that has mass and takes up space Mass – a measurement that reflects the amount of matter Weight – a measure of the amount of matter and.
