Answer:
Streak is tested by scraping a mineral across plate
Explanation: Hope this helps :)
Answer:
1) mass and type of material
2) type of material
3) temperature
Explanation:
Answer:
Molecules move from areas of high concentration to areas of low concentration.
Answer:


Explanation:
Given



Required
Determine the area
The area of a triangle is :

By substituting values for the x and y coordinates of A, B and C;
We have:

So:
For instance



The area is:





