Importance of Scientific Investigation Method

Variables and Hypothesis

• Three variables: •Manipulated : is changed (we

change the value/quantity)• Responding : changing• Constant : kept constant

• Hypothesis: relationship between manipulated and responding variables.

Examples of hypothesis:

• You change the temperature of water to see if there is any changes to the volume of water.

• Hypothesis:• The more temperature, the less volume

of water.

Answers:

1. a) i. The temperature ii. Rate of photosynthesis

b) The higher the temperature, the higher the rate of photosynthesis.

Answers:

2. a) i. The length of thread ii. Time taken

iii. Type of pendulum/number of oscillation

b) The longer the thread, the longer time take to oscillate.

Answers:

1. a) i. The weight of load ii. Length of spring

iii. Type of load/ spring

b) The heavier the load, the longer the spring.

c) Hypothesis is accepted. The heavier the load, the longer the spring.