Nature of science. What does that mean ? Organizes knowledge in the form of testable explanations and predictions about the universe. What is yeast?. Vocabulary. Properties of matter Chemical change Physical change State of matter Control Salt Dissolve Yeast Particles
What does that mean?
Organizes knowledge in the form of testable explanations and predictions about the universe
Properties = the characteristics of a substance
Protons and Neutrons are located at the nucleus (center) of the atom, while the electrons whiz around the nucleus.
If an atom's nucleus was the size of the sun, the whole atom would be on a scale of 100 times the size of the solar system.
Energy & Matter make-up the universe mercury, mars, pluto, saturn, earth
Building blocks of every known material
Molecules are made up of two or more atoms.
Simplest molecule is hydrogen, H2
Acompound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds.
pulling apart the substance
Chemical properties can only be observed and measured by performing a chemical reaction
Change in temperature
Nail turns rusty
Change is permanent!!
transmission of energy:
the passage of energy, particularly heat or electricity, through something
Convection is the concerted, collective movement of ensembles of molecules within fluids -- liquids, gasesand rheids. Convection of mass cannot take place in solids, mass can’t flow.