ReadOasis Step 2CEFR A2
Albert was a quiet boy. He liked to think a lot. He looked at the sky and stars. He asked, ?Why? How? What if??
At school, he did not talk much. Some teachers thought he was slow. But Albert kept asking big questions. He read books. He drew pictures. He walked and thought for hours.

One day, he had a big idea. He wrote: E = mc² (E equals M C squared).
What does E = mc² mean?

E means energy (power to move or do things).
M means mass (stuff, things, matter).
C means the...