📚 Topic Summary
Mass is a measure of how much matter an object contains. It's a fundamental property of an object and remains constant regardless of location. Mass is measured in kilograms (kg).
Weight, on the other hand, is the force exerted on an object due to gravity. It depends on both the object's mass and the gravitational acceleration at its location. Weight is measured in Newtons (N) and can change depending on where the object is (e.g., on Earth vs. on the Moon).
🧠 Part A: Vocabulary
Match the terms with their definitions:
- Term: Mass
- Term: Weight
- Term: Gravity
- Term: Kilogram
- Term: Newton
- Definition: The force of attraction between objects with mass.
- Definition: The SI unit of mass.
- Definition: The measure of the amount of matter in an object.
- Definition: The SI unit of force.
- Definition: The force exerted on an object due to gravity.
(Match the terms above with the correct definitions)
✍️ Part B: Fill in the Blanks
Complete the sentences below:
The _______ of an object is constant, while its _______ changes depending on the gravitational field. Mass is measured in _______, and weight is measured in _______. The formula to calculate weight is $W = m \times g$, where $W$ is _______, $m$ is _______, and $g$ is _______. On Earth, $g$ is approximately $9.8 \frac{m}{s^2}$.
🤔 Part C: Critical Thinking
Explain why an astronaut's mass remains the same on Earth and on the Moon, but their weight is different.