Mass and Weight
they’re not the same and you don’t “WEIGH” 70kg!
Prestructural - I still think that I “weigh” a certain number of kg.
Unistructural - I can complete a cartoon explaining that mass is the amount of atoms something has (measured in kg). Weight (N) is the force caused by gravity acting on the mass something has.
Multistructural - I can calculate the weight of a baby morepork on different planets using the formula W=mg. That means weight = mass x gravity.
Relational - I can formulate 5 questions to test whether someone understands how weight is different from mass, or test whether they can calculate weight using mass and gravity.
NZC Level Six Science Strand Physical World | Students can: Investigate trends and relationships in physical phenomena in the area of mechanics. | Specific Learning Outcomes: 2. Explain why weight is a force and you don’t “weigh” any amount of kg. |
Extended Abstract - I can theorise about why people use the word ‘weight’ wrong (I “weigh” 70kg and I’m going to lift 5kg “weights” now) and how Year 11 students could remember how to calculate weight for their NCEA Mechanics exam.
NZC Level Six Science Strand Physical World | Students can: Investigate trends and relationships in physical phenomena in the area of mechanics. | Specific Learning Outcomes: 2. Explain why weight is a force and you don’t “weigh” any amount of kg’s. |
Gramma Talla says she weighs 53kg but my teacher says that’s her mass...
Hoi?
So if her mass is 53kg, that means she has about 53kg worth of atoms that make up her body.
Hoi.
So what’s her weight on Earth then?
Well Moana, Gramma Talla’s weight is when...
Unistructural - I can complete a cartoon defining mass as the amount of atoms something has (measured in kg). Weight (N) is the force caused by gravity acting on the mass something has.
NZC Level Six Science Strand Physical World | Students can: Investigate trends and relationships in physical phenomena in the area of mechanics. | Specific Learning Outcomes: 2. Explain why weight is a force and you don’t “weigh” any amount of kg’s. |
Multistructural - I can calculate the weight of a baby morepork on different planets using the formula W=mg. That means weight = mass x gravity.
Weight (N) = mass (kg) x gravity (m/s2)
Planet | Morepork mass (kg) | Gravity on planet (m/s2) | Weight of bird (N) |
Mercury | 1.3 | 3.7 | |
Venus | 1.3 | 8.8 | |
Earth | 1.3 | 9.8 | |
Mars | 1.3 | 3.7 | |
Jupiter | 1.3 | 24.9 | |
Saturn | 1.3 | 10.4 | |
Uranus | 1.3 | 8.8 | |
Neptune | 1.3 | 11.2 | |
NZC Level Six Science Strand Physical World | Students can: Investigate trends and relationships in physical phenomena in the area of mechanics. | Specific Learning Outcomes: 2. Explain why weight is a force and you don’t “weigh” any amount of kg’s. |
Relational - I can formulate 5 questions to test whether someone understands how weight is different from mass, or test whether they can calculate weight using mass and gravity.
You can write your questions below or create a Google Form and link it here:
NZC Level Six Science Strand Physical World | Students can: Investigate trends and relationships in physical phenomena in the area of mechanics. | Specific Learning Outcomes: 2. Explain why weight is a force and you don’t “weigh” any amount of kg’s. |
Extended Abstract - I can theorise about why people use the word ‘weight’ wrong (I “weigh” 70kg and I’m going to lift 5kg “weights” now) and how Year 11 students could remember how to calculate weight for their NCEA Mechanics exam.
I think that....