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TELL ME WHY. UNIT 74
WHY DO SCIENTISTS BELIEVE IN SOMETHING THEY CANNOT SEE?
| DEFINITION | TERM |
|---|---|
| the physical substance that everything in the universe is made of | matter |
| to keep something in position or prevent it from separating | to hold |
| to travel around a planet, star or other object in space | to orbit |
| situated on the outside or farther from the centre | outer |
| the place where something ends or its outer limit begins | edge |
| to hit another person or object while moving | to collide |
| until now; up to the present moment | so far |
| to form a conclusion from evidence rather than direct observation | to infer |
| the amount of matter contained in an object | mass |
| a circle of light or a ring-shaped area surrounding something | halo |
| a curved piece of glass or other material that bends light | lens |
| a possible explanation that can be tested through study or experiment | hypothesis |
| to come together or bring people or things together in one place | to gather |
| not present where someone or something is expected to be | missing |
| evidence that shows that something is true or certain | proof |