NEW
Font size
WorksheetsHow Do Scientists Know When Substances Change?
Total questions: 13
Worksheet time: 15mins
If you leave an ice cube out, and it melts, this is an example of
property change.
a reaction.
a state change
condensation.
When a substance evaporates, the particles in the substance...
move faster and the substance changes into a gas.
move faster and lose heat
move slower and the substance changes into a solid
move slower and change color
Which is an example of a reaction?
cooking an egg white
boiling water
freezing juice
water droplets on a pot lid
Which of the following is NOT a sign of a reaction?
The formation of a solid.
Change in color.
Release of energy.
Melting of a substance.
A glassblower is in the process of making a glass vase. Which of the following is an example of a property change taking place in the glass?
The glassblower heats solid glass, melting it into a syrup-like liquid.
The glassblower uses a soft cloth to wipe the dust off his finished vase.
The glassblower paints the glass vase he made, changing the color of the glass.
The glassblower puts the vase he made on display, changing its environment.
Robin looks out her window on a rainy day. Even though the roof protects the windows from rain, she sees water droplets on the outside surface of the glass. What is causing condensation to take place on the window glass?
Water vapor particles heat up when they make contact with the glass, changing from a liquid to a gas.
Water vapor particles in the air cool when they make contact with the glass, changing from a gas to a liquid.
Water vapor particles cool down when they make contact with the glass, changing from a liquid to a solid.
Water vapor particles heat up when they make contact with the glass, changing from a solid to a liquid.
A state change changes...
the properties and the substance.
the properties but not the substance.
the substance but not the properties.
neither the properties nor the substance.
What happens when a substance melts?
The particles slow down and stick together.
The particles speed up and move apart.
The particles slow down and stay close.
The particles speed up but stay close.
_________ happens when a liquid boils.
Melting
Freezing
Evaporation
Condensation
Condensation is the state change from...
liquid to solid.
gas to liquid.
solid to liquid.
gas to solid.
What changes in a reaction?
The properties and the substance.
The substances but not the properties.
The properties but not the substances.
Neither the properties nor the substances.
Burning is a reaction that causes...
an energy to change.
a solid formation.
a gas formation.
all of the above.
Cooking pasta...
changes the pasta properties.
causes a reaction with water.
changes the pasta substance.
causes no changes to the pasta.
