3) which is an example of a physical change? a) grinding pepper b) toasting bread c) lighting up a grill d) baking a cake

Define pseudoscience?

What is true of enzymes? They only speed up reactions. They speed up or slow down any reaction in a living thing. They act as catalysts, each for one specific reaction. They only slow down reactions

State in which a substance has definite shape and a definite volume

Which elements are in the same group of the periodic table? A. Ca, Na, Rb, Sr B. Al, Ar, Cl, S C. Au, Hg, Pb, Pt D. As, Bi, P, Sb

Which of the following changes decreases the pressure in a gaseous system? a) decreasing the volume b) increasing the temperature c) increasing the number of gas molecules d) all of the above e) none of the above

What kind of cell keep dirt off your body's organs

How could one rapidly separate red #40 from zinc oxide? indicate every step.

What is the KE of 750 kg car moving at 25 m/s?

Which of the following is an extensive physical property? viscosity color mass density

Are protons and neutrons the same size? Explain.