| A | B |
| Van Leeuwenhoek | first saw microscopic organisms |
| microscope | produces magnified images |
| lens | curved glass |
| compound microscope | has two or more lenses |
| electron microscope | uses electrons |
| X-Rays | invisible radiation |
| MRI | uses magnetism and radio waves |
| refracting telescope | uses lenses to focus light |
| reflecting telescope | uses mirrors to focus light |
| electromagnetic spectrum | visible and invisible light |
| radio telescope | collects radio waves |
| bathyscaph | small, sphere-shaped diving vessel |
| seismograph | detects earthquakes |
| barometer | measures air pressure |