Science 1st 9 wk ch. 3 (Haggard/7th gr)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Element | any substance that cannot be broken down into simpler substances
🗑
|
||||
| Compound | when two or more elements combine chemically
🗑
|
||||
| Organic Compound | any compound that contains the element carbon
🗑
|
||||
| Selectively Permeable Membrane | Some substances can pass through this kind of membrane, while other substances cannot pass through.
🗑
|
||||
| Diffusion | the process by which molecules move from an area of higher concentration to an area of lower concentration; it is the main method by which small molecules move across the cell membrane
🗑
|
||||
| Osmosis | the diffusion of WATER molecules through a selectively permeable membrane
🗑
|
||||
| Passive Transport | the movement of dissolved materials through a cell membrane without using cellular energy (ex. diffusion and osmosis)
🗑
|
||||
| Active Transport | the movement of materials through a cell membrane USING cellular energy
🗑
|
||||
| Photosynthesis | the process by which a cell captures energy from sunlight and uses it to make food
🗑
|
||||
| Respiration | the process by which cells obtain energy from glucose; cells break down simple food molecules such as sugar and release the energy they contain
🗑
|
||||
| Chlorophyll | the main photosynthetic pigment in chloroplasts (green color)
🗑
|
||||
| Fermentation | an energy-releaseing process that does not require oxygen (some single-celled organisms live where there is no oxygen, such as deep in the ocean or in the mud in swamps, and they obtain energy this way
🗑
|
||||
| Mitosis | the stage during which the cell's nucleus divides into two new nuclei
🗑
|
||||
| Why is water important for a cell? | Most chemical reactions in cells require water.
🗑
|
||||
| What important role do enzymes play? | They speed up chemical reactions.
🗑
|
||||
| How does photosynthesis help heterotrophy? | It creates food they can eat.
🗑
|
||||
| How are photosynthesis and respiration related? | They have opposite equations. Together, these two processes keep the levels of carbon dioxide and oxygen in the atmosphere fairly constant.
🗑
|
||||
| Explain what occurs during each of th two stages of photosynthesis. p. 88-89 | 1.) Chloroplasts in plant cells capture energy from sunlight. 2.) The captured light energy is used to produce sugars and oxygen from water and carbon dioxide.
🗑
|
||||
| Explain what occurs during each stage of respiration. | 1.) In cytoplasm, glucose is broken down into smaller molecules and a small amount of energy is released. 2.) In mitochondria, the smaller molecules combine with oxygen to produce water and carbon dioxide. This reaction releases a large amount of energy.
🗑
|
||||
| Describe a DNA molecule. (How is it shaped? What makes up each rung of the DNA ladder?) | It is spiral-shaped, like a spiral staircase. The rungs consist of pairs of nitrogen bases: A-T and C-G.
🗑
|
||||
| What is copied during DNA replication? | the cell's DNA
🗑
|
||||
| Study the comparison chart of photosynthesis and respiration. |
🗑
|
||||
| Cell Wall | provides shape and protection; found in plant cells only
🗑
|
||||
| Cell Membrane | separates cell from environment, and controls what enters and leaves; found in plant and animal cells
🗑
|
||||
| Nucleus | controls cellular activities, and this is where the chromosomes are located; found in plant and animal cells
🗑
|
||||
| Nucleolus p.62 | site where ribosomes are made; found in plant and animal cells
🗑
|
||||
| Cytoplasm | jelly-like substance that holds other organelles in cell, and this is the region between the cell membrane and the nucleus; found in plant and animal cells
🗑
|
||||
| Mitochondria | provides energy for cell; found in plant and animal cells
🗑
|
||||
| Endoplasmic Reticulum (ER) | transports liquids, proteins, and other materials through the cel; found in plant and animal cells
🗑
|
||||
| Ribosomes | produce proteins; found in plant and animal cells
🗑
|
||||
| Golgi bodies | receive proteins and other materials and packages them for storage or transport; found in plant and animal cells
🗑
|
||||
| Chloroplasts | capture sunlight for energy used to produce food through photosynthesis; found in plant cells only
🗑
|
||||
| Vacuoles | store and transport substances like food, water, and waste; found in plant and animal cells
🗑
|
||||
| Lysosomes | store enzymes, and used to break down large molecules, cell parts, and even whole cells; found in plant and animal cells
🗑
|
||||
| Photosynthesis | occurs in chloroplasts (with chlorophyll) energy is captured, raw materials are water and carbon dioxide, end products are glucose and oxygen,
🗑
|
||||
| Respiration | occurs in cytoplasm and mitochondria, energy is released, raw materials are glocuose and oxygen, end products are water and carbon dioxide
🗑
|
||||
| photosynthesis chemical equation | Carbon dioxide + water + light energy -->glucose + oxygen
🗑
|
||||
| respiration chemical equation | glucose + oxygen -->carbon dioxide + water + energy
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
hudsonl
Popular Science sets