Across
- 2. These are the lenses located on the revolving nosepiece of a microscope. They provide different levels of magnification, such as 4x, 10x, and 40x.
- 4. This is a measurement of how much larger an object appears under the microscope. You find the total power by multiplying the ocular lens by the objective lens.
- 5. These are short, microscopic hairs that cover the outside of some cells. They vibrate in unison to move the cell or to pull food into its mouth.
- 7. This is a process where organisms use energy from chemical reactions to produce food. Unlike plants, these organisms do not require any sunlight to survive.
- 9. This is the large knob used to move the stage up and down quickly. It should only be used when you are first finding the specimen on low power.
- 11. This term refers to a false foot created by the stretching of a cell's membrane. It is used by organisms like amoebas to move and capture prey.
- 14. This is a slide preparation that uses a drop of water or liquid to suspend the specimen. It is commonly used to view living microorganisms.
- 17. This consists of organic matter produced by the decomposition of organisms. It serves as a major food source for many small marine creatures.
- 18. This occurs when a living creature absorbs a toxic substance at a rate faster than it can be released. Over time, the concentration of the toxin increases within the organism.
- 19. This is the smaller knob used to sharpen the focus of the image. It is specifically used when you are on high-power magnification.
- 21. This refers to the entire circular area that is visible when looking through the eyepiece. The area gets smaller as you increase the magnification.
- 22. This is the flat platform where you place the slide for observation. It usually has clips to keep the slide from moving around.
- 25. These are solid, layered structures created by the trapping of sedimentary grains by colonies of microorganisms. They represent some of the oldest records of life on Earth.
- 26. In biology, this is an organism that does not cause disease itself but spreads infection by conveying pathogens from one host to another.
- 27. These are long, thread-like structures that stick out from a cell body. They whip back and forth to help the microorganism move through liquid.
- 28. These are tiny, colorful algae that live inside the tissues of coral. They provide the coral with food through photosynthesis.
Down
- 1. This is a method of asexual reproduction used by bacteria. A single cell duplicates its genetic material and then splits into two identical cells.
- 3. This is the lens at the very top of the microscope that you look through with your eye. It typically provides a 10x magnification on its own.
- 6. This is a microscopic agent that can only replicate inside the living cells of another organism. Scientists often debate if they should be considered truly alive.
- 7. These are a group of bacteria that can manufacture their own food through photosynthesis. They are often referred to as blue-green algae.
- 8. This is a very small, thin square of plastic or glass that is placed over a specimen. It protects the microscope lens and keeps the specimen flat.
- 10. This is a general term for the hard, protective shell or skeleton found on some microorganisms. It helps protect the soft internal parts of the cell.
- 12. This is a single-celled type of algae that is famous for its unique cell wall. Its shell is made of silica, which gives it a glass-like appearance.
- 13. These are tiny marine organisms that use two whip-like tails to swim in a spinning motion. Some species are bioluminescent and can glow in the dark.
- 15. This is a specific genus of dinoflagellate that is sometimes called the phantom algae. It is known for releasing toxins that can be harmful to fish.
- 16. This is a thin, rectangular piece of glass used to hold a specimen. It allows light to pass through the object so it can be seen clearly.
- 20. This is a rapid increase in the population of algae in a water system. It often turns the water green and can deplete oxygen levels.
- 21. This is the hard, porous external layer of a diatom. It is made mostly of silica and consists of two overlapping halves.
- 23. This is the name for one of the two shells that make up a diatom's protective exterior. They fit together like a tiny pillbox.
- 24. This is the sturdy bottom part of the microscope that supports the entire instrument. You should always keep one hand under it when carrying the device.