A science lab experiment grows seedlings under four different light conditions. The bar chart shows the number that germinated under each condition. 0510152...
Question 1 Report
A science lab experiment grows seedlings under four different light conditions. The bar chart shows the number that germinated under each condition.
- Write down the light condition with the greatest number of germinated seedlings, and state how many germinated. (1)
- Work out the range of the number of germinated seedlings across the four conditions. (2)
Answer Details
Reading a bar chart means comparing the heights of the bars against the scale marked on the vertical axis; the range is then found in the usual way, by subtracting the smallest bar's value from the largest.
- The tallest bar is 'Bright', reaching \(25\) seedlings, so Bright had the greatest number of germinated seedlings. [1 mark]
- Reading each bar gives \(9\) (Dark), \(18\) (Dim), \(25\) (Bright) and \(20\) (Full sun); the range is: \[ 25-9=16 \] [2 marks]
Germination clearly improves as light increases from Dark up to Bright, but then falls back slightly under Full sun, which suggests the seedlings have an optimal amount of light beyond which too much light is no longer helpful.
Download The App On Google Playstore
Everything you need to excel in your exams
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning