Biology Maths Paper1
1 Gradient Gradient = Change in y
Change in x
2 Prefixes and multiple tera (T) = 1012 – giga (G) = 109 – mega (M) = 106 – kilo (k) = 1000 – deci (d) = 0.1 –
of unit centi (c) = 0.01 – milli (m) = 0.001 – micro (μ) = 10-6 – nano (n) = 10-9 – Pico = 10-12
3 Uncertainty Uncertainty = Range
2
4 Total magnification Total magnification = Eyepiece lens magnification × objective lens magnification
5 Image size Image size = Magnification × Real size
6 Rate of reaction Rate of reaction (cm3/s) = amount of product produced (cm 3) ÷ time taken (s)
Rate of reaction (cm3/s) = amount of reactant used up (cm3) ÷ time taken (s)
7 Amount of energy a Energy in Foods (J) = Mass of water (g) × Temperature of water (C̊) × 4.2
food contains
8 Energy per gram of Energy per gram of food (J) = Energy in food (J)
food Mass of food (J)
9 Percentage change in Percentage change = Final mass (g) – Initial mass (g) × 100
mass Initial mass (g)
10 Area of inhibition Area of a circle = πr2
zones
11 BMI Body Mass Index = Mass (kg)
(height(m)) 2
12 Body mass Index <18.5 = Underweight -- 15.5 – 24.9 = “normal” -- 2 – 29.9 = Overweight
weight descriptions 30 – 40 = moderately obese -- >40 = severely obese
13 Waist-hip-ratio Waist-to-hip ratio = Waist circumference (cm)
Hip circumference (cm)
14 Waist-hip-ratio >1.0 for males & > 0.85 for females = abdominal obesity > healthy ratio
weight descriptions
1 Gradient Gradient = Change in y
Change in x
2 Prefixes and multiple tera (T) = 1012 – giga (G) = 109 – mega (M) = 106 – kilo (k) = 1000 – deci (d) = 0.1 –
of unit centi (c) = 0.01 – milli (m) = 0.001 – micro (μ) = 10-6 – nano (n) = 10-9 – Pico = 10-12
3 Uncertainty Uncertainty = Range
2
4 Total magnification Total magnification = Eyepiece lens magnification × objective lens magnification
5 Image size Image size = Magnification × Real size
6 Rate of reaction Rate of reaction (cm3/s) = amount of product produced (cm 3) ÷ time taken (s)
Rate of reaction (cm3/s) = amount of reactant used up (cm3) ÷ time taken (s)
7 Amount of energy a Energy in Foods (J) = Mass of water (g) × Temperature of water (C̊) × 4.2
food contains
8 Energy per gram of Energy per gram of food (J) = Energy in food (J)
food Mass of food (J)
9 Percentage change in Percentage change = Final mass (g) – Initial mass (g) × 100
mass Initial mass (g)
10 Area of inhibition Area of a circle = πr2
zones
11 BMI Body Mass Index = Mass (kg)
(height(m)) 2
12 Body mass Index <18.5 = Underweight -- 15.5 – 24.9 = “normal” -- 2 – 29.9 = Overweight
weight descriptions 30 – 40 = moderately obese -- >40 = severely obese
13 Waist-hip-ratio Waist-to-hip ratio = Waist circumference (cm)
Hip circumference (cm)
14 Waist-hip-ratio >1.0 for males & > 0.85 for females = abdominal obesity > healthy ratio
weight descriptions
