So in FE8B Math we have been continuing with our angle proofs unit. We have learned new rules for a set of parallel lines with a transversal line. A transversal line is a straight line that goes though both the parallel lines. There is the F-rule that states the the two angles on the inside of the F are equal. Here is a diagram:

The green lines are the F, and the two red angles are equal.

The next rule is the Z rule which states that the two angles in the Z are equal. These are called alternate angles.

The green lines are the Z and the two red angles are equal.

The third rule is the C rule which shows that the two angles in the C equal 180 degrees. These are called corresponding angles.

The green lines are the C, and the two red angles equal 180 degrees.

The final rule is the exterior alternate rule which means that the two angles on the outside opposite each other are equal.

In this diagram, the two red angles are equal.

In Science we are learning about fluids. We have been talking about density of fluids, viscosity of fluids, and the properties of the different states of matter (solid, liquid, gas).

We have also learned about how states of matter change from one to the other. The transitions are as follows:

When a solid is heated, it becomes a liquid. This is called melting. An example of this is when you eat ice cream in the summer and it melts in your cone when you don't eat it fast enough.

When a liquid is cooled, it becomes a solid. This is called freezing. An example of this is when you leave a water bottle in your car over a winter night and the next day it has become ice.

When a liquid is heated, it becomes a gas. This is called vaporization. An example of this is when you boil water and vapour comes of, as the water has become a gas.

When a gas is cooled, it becomes a liquid. This is called condensation. An example of this is if you put a lid on the boiling water, the vapour cools as it hits the cold metal and turns back into water again.

When a solid becomes a gas or a gas becomes a solid WITHOUT going through a liquid stage it is called sublimation. An example of this is "dry ice" (solid carbon dioxide) that is used for special effects in concerts, movies, etc.

Until Next Wednesday,

-K