Investigation 3- Vocabulary
5th Grade Science
Our first Lab Learner we will be working on is Microscopic Explorations!
- The parts of a microscope that refract light are the objective and eyepiece. They both contain lenses and the lenses cause the light to “bend”.
- Three examples of eukaryotic cells are: skin, tomato, and onion. Eukaryotic cells contain a defined nucleus.
- To find the total magnification on a microscope – times the eyepiece, which is 10x by the objective. Example: 10x times 40= 400x
- Rachel and Juan were looking at plant specimens under a microscope – they are not able to see chloroplast they tell Mrs. Snowden she says it is still a plant cell it must be from the root- without the sun cells don’t go through photosynthesis.
- As magnification increases, resolution increases and the field of view decreases.
- Concave lenses make the image smaller in appearance.
- Plant cells contain a nucleus, cytoplasm, cell membrane, cell wall and chloroplasts. Chloroplasts are responsible for photosynthesis.
- Convex lens increases the size of an object, and concave lens decrease the size of the object.
- There are 2 types of sectioning cross- sectioning (-----) and longitudinal ( l.)
- As magnification increases the detail and resolution increase.
- Robert Hooke-First scientist to discover cells by using a microscope.
3. Endoplasmic reticulum- Helps to clean out and detoxify cells.
4. Lysosomes- Helps with digestion in cells to get rid of unneeded materials. Breaks apart proteins, fats and sugars.
5 . Golgi Apparatus- said gol –g Responsible for sorting and getting rid of products in cells.
6. Peroxisomes- said pear ox i soms. Contains enzymes that help break down fatty acids.
7. Cytoplasm- A gel-like area of a cell between the nucleus and the cell wall. Resembles Jell-O.
8. Organelle- A small structure inside a cell that performs a specific function.
9. Mitochondria- Creates the energy of the cell. It is known as the powerhouse of the cell.
10. Eukaryotic Cell- A cell that has a defined nucleus.
11. Cell- The smallest structure of living organisms that perform functions necessary for life. They cannot be seen with the naked eye.
12 . .Electron microscope- A high powered microscope developed in the 1950’s that is used to view cells.
13. Cell membrane- Determines what comes in and out of the cell- the gatekeeper of the cell.
3 factors that affect photosynthesis
- Leaf pigments
- Length of night
Joseph Priestly- minister and teacher who is associated with discovering photosynthesis.
Jean Senebier- showed that plants took up carbon dioxide.
Cell wall- the non-living structure that surrounds the cell membrane of most plant cells. The cell wall helps the plant cell keep its shape.
Chloroplast- organelle in plant cells where photosynthesis occurs.
Chlorophyll pigments- green substances found in the chloroplasts of plants. Chlorophylls give leaves their green color and are important to photosynthesis.
Photosynthesis- the process in which energy from light is converted into the energy of chemical bonds. In plants, water, carbon dioxide and light are used to produce sugar and oxygen. The sugar is used as a source of food for the plant.
Prokaryotic cell- a cell that does not contains a clearly defined nucleus, such as bacteria.
Specimen- an example, or a small piece of a larger object, animal or plant.