No student devices needed. Know more
15 questions
Water at 20°C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly?
Cover it
Add salt to it
Increase the motion of molecules
Decrease the motion of molecules
Water vapor (a gas) changes to liquid water during which process?
melting
precipitation
condensation
Which process is an example of a physical change?
milk souring
wood burning
iron rusting
ice melting
A material that allows electric currents (energy) or heat to flow freely across atoms examples: copper, gold, and silver
Density
Chemical Reaction
Conductor
One or two letter code for a chemical element on the periodic table of elements
Element symbol
Force and motion
Chemical reaction
What is the energy that associated with moving objects
potential
kinectic
electrical
What happens when a substance increases in the volume of matter with increasing temperatures
expansion
contraction
A scientific prediction or guess about what’s going to happen in an experiment
conclusion
hypothesis
test
data table
Explore all questions with a free account