Do We Expand With The Universe

The video explains that while the universe isn't expanding, space itself is. This expansion affects the distance between objects, but forces like gravity and electromagnetism keep atoms and solar systems intact. An analogy of a cat on a leash illustrates how these forces work. Over vast distances, gravity's pull weakens, allowing galaxies to drift apart, evidenced by redshifted light.

What is actually expanding in the universe?

• The universe itself

• Atoms and molecules

• Space

• Galaxies

Which forces are strong enough to resist the expansion of space?

• Electromagnetism and gravity

• Electromagnetism and nuclear force

• Magnetism and inertia

• Nuclear force and friction

What analogy is used to describe how forces keep objects together despite space expanding?

• A leash holding a cat

• A magnet and metal

• A rope tying two boats

• A chain linking two anchors

What happens to galaxies over super long distances due to space expansion?

• They grow more distant

• They remain static

• They shrink

• They collide

How do we know that distant galaxies are moving apart?

• Through the redshift of light

• Through the blue shift of light

• By measuring their size

• By observing their brightness