Water’s Properties: Density, Floating & Surface Effects — Drills · Grade 6 Science
Chapter: Matter, Mixtures & Water PropertiesWhat these drills covers
By the end of Water’s Properties: Density, Floating & Surface Effects you should be able to:
- I can predict whether an object floats by comparing its average density with water's.
- I can explain how a steel ship floats when steel is far denser than water.
- I can explain why coastal places have smaller temperature swings than inland ones.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: buoyancy, surface tension, evidence, system boundary, uncertainty.
Problem 1
- The heaviest or largest object must always sink.
- buoyancy: The upward force a fluid exerts on an immersed or partly immersed object.
- Ice floats because freezing removes its mass.
- A sample with missing measurements has proved those values are zero.
Answer and explanation
buoyancy: The upward force a fluid exerts on an immersed or partly immersed object.
The upward force a fluid exerts on an immersed or partly immersed object.
Problem 2
- The heaviest or largest object must always sink.
- Ice floats because freezing removes its mass.
- surface tension: An effect of particle interactions at a liquid surface that can influence small surface objects.
- Repeating any method makes every causal claim true.
Answer and explanation
surface tension: An effect of particle interactions at a liquid surface that can influence small surface objects.
An effect of particle interactions at a liquid surface that can influence small surface objects.
Problem 3
Answer and explanation
No. Mass stays 90 g while volume and density change with arrangement.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 4
Answer and explanation
No. A surface force can matter for a small object; density and buoyancy must be considered separately.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.