Microscopes

It happened over 300 years _________sinceagobeforeafter in Holland. Anton van Leeuwenhoek (AN-tun van LAY-vun-hook) had a new microscope that he had _________madelostprevieweddelivered. One day he _________fellbrokelookedwent through it at a drop of lake water. What he saw surprised him.

The water was alive with what Leeuwenhoek called "wee beasties." The microscope made tiny organisms look 200 times _________farthersmallerdarkerlarger than life size. Leeuwenhoek was one of the first scientists to see living things that were that _________lifesmalldarkerlarger. His work was a giant _________turtlegorillasteptower for science.

Today, microscopes are much stronger. An electron microscope can make tiny organisms look 200,000 times _________smalloverunderlife size. A few electron microscopes can see individual atoms. Pictures can be made to show the objects or organisms much bigger. The pictures add greatly to what we know about tiny objects and _________organismsgravityelectricitymicroscopes. Microscopes have come a long way in 300 years!