100 g 200 g 300 g 400 g 500g Mass Force needed to lift the mass 2.1 N 3.6N 5.2 N 6.8 N 8.3 N What are the variables? Which is the input variable? Which is the outcome variable? What is the relationship between the variables? Predict the force needed to lift a 600g mass 1. Pulleys 1cm 2cm 4cm 8cm 16cm container number Diameter 130 cm 32 cm 8 cm 2 cm ? Depth of water What is the input variable? What is the outcome variable? What is the relationship between the variables? Predict the depth of water for container 5 2. Height of liquid Leaf 1 - top surface covered with vaseline Leaf 2 - bottom surface covered with vaseline Leaf 3 - top and bottom covered with vaseline Leaf 4 - No surface covered with vaseline nearly dry leaf second freshest leaf driest leaf Surface covered in vaseline Freshness of leaf 3. Leaves What is the input variable? What is the outcome variable? Is water lost mostly from a) the top surface? b) the bottom surface? c) both surfaces equally? d) neither surface? Give a reason for your answer Activity 2: Variables Two variables Veena Clark Sharon Susan Robert Lee Name of student 148 cm 146 cm 151 cm 142 cm 149 cm 144 cm 43 kg 31 kg 38 kg 35 kg 34 kg 42 kg Height of student Weight of student 4. Height and weight What is the input variable? What is the outcome variable? What is the relationship between the variables? Give a reason for your answer

What are the variables? Which is the input variable? Which is the outcome variable? What is the relationship between the variables? Predict the force needed to lift a 600g mass 1. Pulleys What is the input variable? What is the outcome variable? What is the relationship between the variables? Predict the depth of water for container 5 2. Height of liquid 3. Leaves What is the input variable? What is the outcome variable? Is water lost mostly from a) the top surface? b) the bottom surface? c) both surfaces equally? d) neither surface? Give a reason for your answer Activity 2: Variables Two variables 4. Height and weight What is the input variable? What is the outcome variable? What is the relationship between the variables? Give a reason for your answer

Graph A Input Variable Outcome variable Graph B Outcome variable Input Variable Outcome variable Input Variable Graph C Input Variable Outcome variable Which of these graphs, if any, best represents any relationship found in each of the four sets of results obtained from activity two? Give reasons for your answer. Graph D

100 g 200 g 300 g 400 g 500g 600g ? Mass Force needed to lift the mass 2.1 N 3.6N 5.2 N 6.8 N 8.3 N ? Pulleys 1cm 2cm 4cm 8cm 16cm ? container number Diameter of container 130 cm 32 cm 8 cm 2 cm ? 511cm Depth of water 2. Height of liquid Activity 2: Variables Two variables Veena Clark Sharon Susan Robert Lee Noel Name of student 148 cm 146 cm 151 cm 142 cm 149 cm 144 cm 139 cm 43 kg 31 kg 38 kg 35 kg 34 kg 42 kg ? Height of student Mass of student 3. Height and mass For each of the above examples, answer the following questions ( A )What are the variables being investigated in each example? ( B ) What is the input variable in each example? ( C ) What is the outcome variable in each example? ( D )Is there a relationship between the input and outcome variables in each example? Give a reason for your answer ( E ) Predict values that can replace each question mark shown in the above examples. Justify your predictions.

ANSWERS (A) (B) (C) (D) (E) ANSWERS A) (B) (C) (D) (E) ANSWERS A) (B) (C) (D) (E) 1. Pulleys2. Height of liquid Activity 2: Variables Two variables 3. Height and mass