Chemical Change 2

How do you know that rusting is a chemical change?

• it changes color

• atoms were rearranged to form a new substance

• we just know

• the rust

What property of metals does the term conductivity describe? (HINT: Think back to 6th grade.)

• reactivity with other elements

• melting & freezing point

• ability to transfer heat and electrcity

• density

What does an element's location on the periodic table tell you?

• info about the properties of the element

• importance & abundance if the elements

• order of discovery

• alphabetical order

The following are examples of evidence of a chemical reaction....

• ice melting into a liquid

• condensation

• endothermic reaction

• change in color, production of gas bubbles

What happens when a new substance is produced during a reaction?

• physical change

• chemical change

A green powder is heated & a gas is given off while it turns to a black solid. This describes

• Physical Change

• Chemical Change

• Change in State

• Change in Temperature

Which of the following could indicate that a chemical change took place?

• Change in color

• Production of Energy

• Formation of Gas

• All are correct

A green powder is heated & a gas is given off while it turns to a black solid. This describes

• Physical Change

• Chemical Change

• Change in State

• Change in Temperature

Which of the following could indicate that a chemical change took place?

• Change in color

• Production of Energy

• Formation of Gas

• All are correct

The formation of a solid when two liquids combine is called?

• Solidification

• Freezing

• Precipitate

• Solubility