Final answer:
Gravity is a force that helps us stay on Earth and is a force of attraction between objects with mass. However, gravity exists everywhere in the universe, not just on Earth, and its strength is not uniform across different locations on Earth.
Step-by-step explanation:
When considering the statements provided about gravity, there are specific facts that we can affirm as true:
- Gravity helps us stay situated on Earth without floating away. This is because gravity is the force that attracts a body towards the center of the Earth, or any other physical body having mass.
- Gravity is a force of attraction between objects with mass. Indeed, according to Newton's law of universal gravitation, any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
However, the following statements are not accurate:
- Gravity only exists on Earth and not in space. This is false because gravity exists everywhere in the universe, not just on Earth. It is the force that holds the planets in orbit, among other universal phenomena.
- The strength of gravity is the same everywhere on Earth. This is incorrect. The strength of gravity varies slightly depending on the mass distribution of Earth and the distance from the Earth's center, meaning that gravity can be slightly stronger or weaker in different locations on the planet.