Tables, Graphs & Patterns in Data — Drills · Grade 7 Science
Chapter: Scientific Inquiry & Diversity of LifeWhat these drills covers
By the end of Tables, Graphs & Patterns in Data you should be able to:
- I can explain tables, graphs & patterns in data.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice, numeric and written answer, each with a worked explanation.
Vocabulary used: data, mean, range, correlation, extrapolation.
Problem 1
Which graph is suitable for separate habitat categories?
- A bar graph
- A drawing without labels
- A graph with changing scale intervals
- A pie chart with no totals
Answer and explanation
A bar graph
Bars can compare separate habitat categories when units and sampling effort are comparable.
Problem 2
Find the mean of 2, 4, and 9 cm.
Answer and explanation
5 cm
(2+4+9)/3=15/3=5 cm.
Problem 3
Why is a missing measurement not automatically zero?
Answer and explanation
Missing means no valid observation was recorded. Zero claims that the measured quantity was actually zero.
Problem 4
Does a mean of 5 cm require each plant to be 5 cm?
Answer and explanation
No. Different combinations of measurements can average 5 cm. Inspect the original values and their spread.