3rd Nine Weeks Review

How many Magnesium are in 10MgCl₂?

• 10

• 5

• 20

2H₂ + O₂ ----> 2H₂O What is the product?

• 2H₂O

• 2H₂+ O₂

• H₂O+O₂

showing a likeness in some ways between things that are otherwise different

• homogeneous

• heterogeneous

• analogous

T/F chemical change breaks the bonds between elements

• True

• False

T/F Air pressure increases with height in the atmosphere.

• True

• False

high-altitude air streams

• conduction

• convection

• radiation

We live here

• troposphere

• thermosphere

• stratosphere

What is a coefficient?

• The large number to the left of a formula.

• The small number on the right of the chemical symbol.

Reflects radio waves back to Earth

• stratosphere

• mesosphere

• ionosphere

steady winds that flow from west to east

• easterlies

• westerlies

• trade winds