Gravity Pulls Objects Down
Gravity pulls objects down toward Earth, and it acts on every object with mass even when nothing is touching it. When you drop a ball, gravity is the invisible force responsible for pulling it to the ground. Unlike magnetism, gravity is always attractive and works on all matter, not just magnetic materials. In Grade 3 science with Amplify Science California Grade 3, students learn that gravity is a non-contact force that acts across a distance. Understanding gravity is fundamental to physics and connects to studying planetary motion, falling objects, and engineering design.
Key Concepts
When an object is dropped, it falls downward. This happens because of a force called gravity . Gravity is a special non contact force that acts between the Earth and objects. Even though nothing is touching a falling apple, Earth is pulling it. Gravity always pulls objects toward the center of the Earth. This constant pull is what keeps us on the ground and causes the train to fall if the magnets are turned off.
Common Questions
What is gravity?
Gravity is a non-contact force that pulls objects toward each other. On Earth, gravity pulls everything toward the planet center, which is why objects fall when dropped and why we stay on the ground.
Does gravity push or pull?
Gravity only pulls and it is always an attractive force. Unlike magnetism, there is no gravitational repulsion. Gravity pulls all objects with mass toward each other, though on Earth the planet large mass dominates.
What is a non-contact force?
A non-contact force acts on objects without physically touching them. Gravity is a non-contact force because it pulls on a falling apple before the apple touches the ground. Magnetism and static electricity are other examples.
Does gravity act on all objects?
Yes. Gravity acts on every object that has mass. This includes solid objects, liquids, gases, and even light. On Earth, all objects fall at the same rate in a vacuum, regardless of their mass.
How do 3rd graders learn about gravity?
In Amplify Science Grade 3, students investigate non-contact forces including gravity. They observe that dropped objects always fall downward and compare gravity behavior to magnetism, noting that gravity only pulls while magnets can both push and pull.
Why is learning about gravity important?
Understanding gravity explains why objects fall, how planets orbit the sun, how the tides work, and how rockets must overcome Earth pull to reach space. It is one of the four fundamental forces of nature and applies to nearly every physical event.