North Pole
The North Pole, also called True North, is the northernmost point on Earth. When you are s...
Sarah loved the science fair at school. She never won, but she always had fun. Every year, she made a volcano. She loved sculpting a mountain out of clay, painting it, and placing fake trees and grass around the bottom. In the opening of the top, she put a small canister of baking powder and food coloring. When it was her turn to impress the judges, she'd add a little vinegar. The volcano would erupt. It always made a mess on the gym floor. The judges got upset. She loved making their foreheads wrinkle. Every year she added more vinegar or more baking powder to make a bigger mess. By the time she got to fifth grade, she wanted to make the eruption so big it splattered on the judges' shirts. Sarah smiled. It was only one week to the fair. The volcano had been built. Now she just had to wait.
The North Pole, also called True North, is the northernmost point on Earth. When you are s...
An airship is an aircraft that uses a gas that is lighter than air to lift off the ground....
Comets are like big snowballs in space. They are mostly made up of frozen gases. Far from ...