Answer:
1. 1. A quantity is completely described by magnitude alone. A quantity Is completely described by a magnitude with a direction.
[a]. scalar, vector
b. vector, scalar
2.2. Speed is a velocity is a quantity and quantity.
a. scalar, vector
[b]. vector, scalar
Pet rocks contain organic matter
It can be described as <span>a pure substance and an element. </span>
Answer:
b
Explanation:
it melts yes but it's still water [same element] so there fore it's a physical change