16611022
Description
Flashcards by Fatima Syeda, updated more than 1 year ago
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Created by Fatima Syeda
over 5 years ago
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| Question | Answer |
| Making Things Bigger | |
| Why do scientists use microscopes? | Scientists use microscopes to observe objects too small to view with the human eye. This helps them observe the tiny building blocks of life. |
| What is a light microscope? | The light microscope, is a type of microscope that commonly uses visible light and a system of lenses to magnify images of small objects. |
| What is a stereo microscope? |
Light from a mirror is reflected through the specimen into the powerful objective lens, which produces the first magnification. The image is then magnified again by the eyepiece lens, which acts as a simple magnifying glass.
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| What is a specimen? | A specimen is the object being looked at through the microscope. |
| Label this microscope. |
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| What is a dissection? |
When you cut apart a dead plant or animal to study it.
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| What is magnification? | The amount by which the image is magnified compared to the real object. |
| What is field of view? | The amount of the specimen seen through a microscope. |
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How much in length is a micro-metre?
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A micrometre is one-thousandth of a millimetre. |
| What are two types of electron microscope? | SEM and TEM |
| What do SEM and TEM stand for? | SEM stands for 'scanning electron microscope' and TEM stands for 'transmission electron microscope'. |
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Explain why people might use binoculars.
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People use binoculars to see detail from distance. You can use binoculars for observing scenery, landscape, animal, celestial bodies and much more. |
| List two difference between TEM AND SEM. | TEM: electrons pass through specimen, image is black and white but can be coloured to increase contrast SEM: electrons reflect off surface of specimen, image is black and white but can be given false colour using computers |
| How do electron microscopes work? | Electron microscopes use the beams of tiny particles called electrons instead of light and are able to magnify up to a million times. |
| Who constructed the first true microscope? |
Antony Van Leeuwenhoek
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| Who was the first person to see cells in a slice of cork? |
Robert Hooke
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| Riddle! The more you take, the more you leave behind. What am I? |
Footsteps.
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