Earth & Space
The non-contact force pulling everything towards Earth — and how objects fall when air resistance is negligible.
⏱ Whole lesson ≈ 44 min · pick a tier in the bar, or leave on "All"
Recap of last lesson: water resistance.
Name two forces that slow moving things down.
All these forces need contact. Can you think of a force that works without touching?
Predict what happens when two objects are released together from the same height. Compare a gravity-only model with a fall through air.
Gravity is a non-contact force. Every object with mass has a gravitational pull — the greater the mass, the greater the pull. Gravity pulls everything towards Earth's centre.
Gravity pulls objects ____ (up / down).
Why is gravity a non-contact force?
Predict: do heavier objects always fall faster? Explain your thinking.
Teacher models. Watch, then separate mass from weight.
Swap the clip: change the ID after /embed/ (now 6rE78Ieu7s0).
Use a Newton meter together; read weight in N.
⚖️ mass = grams (matter) | 🡇 weight = Newtons (pull of gravity)
Play the gravity-only model: the balls start together with no air resistance. It does not show every real fall through air.
A gravity-only model: released together from rest at the same height, the balls land together because air resistance is absent.
Watch for: "heavier things always fall faster" and "there is no gravity on the Moon" (there is — it's weaker).
Sort a few statements as a class.
On your own. Sort each statement, then write at your tier.
Tap a card to sort it…
Sort the cards. Then finish: Gravity pulls objects towards Earth's ____.
Sort them, then explain the difference between mass and weight.
Explain why objects of different mass, released together from rest at the same height, land together when air resistance is negligible.
Answer at your tier, then hand it in.
Is there gravity on the Moon? Explain what happens to mass and weight there.