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Science 8 Unit 1,2
Science 8
| Question | Answer |
|---|---|
| nucleus | controls all the cell's activities |
| cell membrane | holds cell in place |
| cytoplasm | controls what enters and leaves |
| vacuole | stores material like wastes |
| mitochondria | produce energy |
| cell wall | protects and supports the plant cell |
| chloroplast | traps light energy |
| Diffusion | movement of the amount of a substance from an area of higher concentration to a area of lower concentration(temperature may change the speed) |
| Osmosis | is the diffusion of water |
| respiratory system | controls breathing |
| skeletal system | has bones that support the body and work with muscle to move the body |
| nervous system | has nerves that detect, signal, and respond to changes in the enviroment |
| excretory system | to remove liquid and gas waste |
| endocrine system | makes hormones |
| digestive system | takes in and break down food, absorbs nutrients and get rid of solid waste |
| integumentary system | protects the body and includes skin, hair and nails |
| reproductive system | include organs to produce offspring |
| immune system | defends the body against infection |
| muscular system | has muscles that work with bones to move the body |
| circulatory system | moves blood, gases, nutrients and wastes |
| carbohydrates | is the fastest source of energy (bread, rice) |
| proteins | helps build muscles, skin, nails and hair (fish and nuts are some examples) |
| fat | use to build cell membrane and can be save in body as energy |
| Innate immune response | quick, general and non specific. WHich means it responses when the body recognize the invader. Examples are, inflammation and phagocytes (white blood cells) |
| Acquired immune response | The phagocytes send a signal to helper T cell to find the specific B cell to defeat this invader. B cell launches antibody to provide antigen to spread. If it doesn't kill them, your body finally activates killer T cells, which destroy everything. |
| Antibodies | Made by B cells to stick on the antigens, providing them to spread. |
| Antigen | Unrecognized pathogens |
| Pathogen | Invaders of our body |
| Allergen | Causes allergy |
| Law of reflection | The angle of incidence is the same as the angle of reflection |
| Order of the electromagnetic spectrum | Radio->micro->infrared->visible->UV->X-ray->Gamma |
| Visible spectrum | ROYGBIV |
| Primary colors | Red, yellow, blue |
| Refraction | Bending of light |
| Crest | Top of a wave |
| Trough | Bottom of a wave |
| Wavelength | Distance from crest to crest, trough and trough ,and wave to wave |
| Amplitude | Height of wave |
| Rest position | A flat line to indicate the curves of the wave |
| Compression wave | Force moves back and forth |
| Transverse wave | Forces moves up and down |
| Translucent | Around half of the light will go through |
| Transparent | All the light could go through |
| Opaque | No light can go through |
| Pupil | the black circle in your eye |
| Iris | the colored ring around your eye |
| Sclera | The white part of your eye |
| Cornea | Refracts the light to hit the back your eye |
| Retina | Back of your eye |
| Lens | Fine tune the image seen by your light |
| Optic nerve | receive the image from your eyes |
| Blind spot | where the optic nerve is connected to the retina |
| Rod cells | Cells that provide us the ability to see shades of grey |
| Cone cells | Cells that provide us the ability to see colors |
Created by:
lwong
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