What is the use of wedge as a simple machine?

What kind of simple machine is a flat surface tilted at an angle with one end higher than the other?

It is a straight or bent rigid bar that is used to push, pull, or lift things.

A longer and thinner wedge has a greater mechanical advantage than a shorter thick wedge.

Select the correct animals in each group.

Classify each substance. 

The correct order of the planet is: 

Rearrange the words to form a meaningful sentence.

Order from smallest to largest.