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Which of these best describes what must happen to the particles in water before it can change from one state to another?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
In an electromagnet, a current is passed through loops of wire that surround a core. Which material would be best to use as the core of an electromagnet?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
A bioengineered technology that changes how an organism functions is an adaptive technology. which of these is an example of an adaptive technology?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
Lemon juice has asour taste and turns blue litmus paper red. What do these properties sugest about lemon juice?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
Which group of substances contains only compounds?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
Where is the reactant located in a chemical equation?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
In which of these cases does a physical change occur?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
What keeps comets in orbit around the sun?
CH4, CaCO3, CO2
The particles must gain or lose energy.
the sun's gravity
genetically altered bacteria that produce human insulin
It is an acid.
to the left of the arrow
When mixed with water, salt dissolves.
a steel screw
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