Gravity and Its Effects

In the 1600s, Isaac Newton discovered gravity's characteristics, formulating the law of universal gravitation. Gravity is a force that pulls objects together, always a pull, never a push. The gravitational force depends on the mass of objects and the distance between them. While Earth's gravity is noticeable, smaller objects have negligible effects. Gravity keeps planets in orbit and organisms grounded. Overcoming gravity requires strong forces like jet propulsion.

Who discovered the characteristics of gravity in the 1600s?

• Albert Einstein

• Isaac Newton

• Galileo Galilei

• Nikola Tesla

What is Newton's law of universal gravitation about?

• The theory of relativity

• The laws of motion

• The force of gravity

• The speed of light

How does gravity act on objects near Earth?

• It pushes them away

• It makes them float

• It pulls them together

• It has no effect

What happens when a person jumps up?

• They stay in the air

• They float away

• They are pulled back down to Earth

• They move sideways

What affects an object's gravitational pull?

• Its shape

• Its color

• Its temperature

• Its mass

Why is the gravitational pull from some objects hardly noticeable?

• Because they are too far away

• Because they are too small

• Because they are too fast

• Because they are too hot

How does distance affect gravitational pull?

• Distance has no effect on gravitational pull

• The closer objects are, the stronger the pull

• The closer objects are, the weaker the pull

• The farther objects are, the stronger the pull

What happens to an astronaut floating in space in terms of gravity?

• They feel more gravity from Earth

• They feel the same gravity as on Earth

• They feel less gravity from Earth

• They feel no gravity at all

What role does gravity play in the solar system?

• It helps planets stay in place around the sun

• It makes planets move away from the sun

• It has no effect on planets

• It makes planets collide with each other

What is needed to overcome the pull of gravity?

• A magnetic force

• No force at all

• A weak force

• A strong force like jet propulsion