Answer:
amount of fertaliser--> the independant variable is the one being changed
Base unit is the fundamental unit of measurement that is not mutually dependent. The seven base units are,
Length - meter
Mass- kilogram
Time - second
Temperature - Kelvin
Current - Ampere
Luminous intensity - Candela
Amount of matter - mole
Derived units are derived from the seven base units. Like the area (square meters) is the square of length (meters), volume is the cube of length.
We have 1.2 kg of rust whithin 5 days.
the rate of reaction in grams per hour:
1.2 kg/5 day * 1000 g/kg * 1 day/24 hours = 10.0 grams/hour
hope this help
The disease can slow the predator down and the prey can get away easily.
Volcanic activity, obviously by erupting volcanoes