Yes, the answer is A for PLATO users.
ozonosphere
ionosphere
exosphere
the relative ages of rocks.
the age of the atoms in a rock.
the half-life of a fossil organism.
the Fraser River
B.
the Yukon River
C.
the Mackenzie River
D.
the St. Lawrence River
Answer:
B
Explanation:
Yukon river is the longest north america river and transports goods
Answer:
B
Explanation: