Archives

Topic: Earth & Space

How do rockets get past Earth’s atmosphere?

Rockets encounter most of the resistance when they’re near the Earth’s surface. The higher up they get, the thinner the air gets, and the resistance pushing against the rocket gets lower.

How does the moon affect the tides?

The tides are the result of the moon exerting its gravitational force on the ocean and bulging it both toward and away from the moon. The tide is higher, the ocean is higher, at the location closest to the moon and on the opposite side of the Earth.

How long would it take a tree to grow in space?

It’s a complicated question because, while researchers have grown spruce seedlings on the International Space Station, they haven’t grown full-size trees. Using knowledge of how trees operate on Earth, scientists can guess what’s going to happen when they’re grown in space.

Why are snowflakes individually unique?

Two important factors influence the shape of snowflakes. One is the ambient temperature, and the other is humidity. A snowflake needs to grow under the condition of a super saturated environment.

How does thunder form?

Thunder is formed by the intense heating produced by lightning. The thunder you hear is made up of vibrations that travel as sound waves through the air until they reach your ear.