specific for ocr gateway additonal science B.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| what does detritus mean? | remains of dead and decaying plants and animals
🗑
|
||||
| what are detritivores? | animals which depend on detritus for their food
🗑
|
||||
| examples of detritivores? | earthworms, maggots, woodlice
🗑
|
||||
| what do detritivores do? | speed up decay as they break the detritus down into smaller pieces, which increases the surface area
🗑
|
||||
| why are detritivores important? | they recycle chemicals from dead plants and animals
🗑
|
||||
| what is another method of using decay? | for compost
🗑
|
||||
| what conditions speed up the composting process? | -warmth
-moisture
-good aeration (to allow oxygen in)
🗑
|
||||
| what happens inside a compost bin? | microorganisms respire, which give off heat and warms up the compost, which speeds up decay
🗑
|
||||
| what does decay depend on? | enzyme action - conditions that speed up enzyme action also speed up decay
🗑
|
||||
| what is the optimum temperature for bacteria? | 37
🗑
|
||||
| what is the optimum temperature for fungi? | 25
🗑
|
||||
| what are the two types of bacteria? | aerobic and anaerobic
🗑
|
||||
| why do aerobic bacteria break down dead detritus quickly? | because they produce oxygen, which speeds up decay
🗑
|
||||
| why do anaerobic bacteria break down dead detritus slowly? | because they produce acid conditions, which slows down decay
🗑
|
||||
| what is a saprophyte? | a fungus that feeds off dead and decaying materials
🗑
|
||||
| what happens to the saprophyte's digestive enzymes? | released on to the food and break it down into simple soluble substances so the digested food is absorbed easily
🗑
|
||||
| what are the 5 ways to preserve food? | canning, cooking, vinegar, drying, freezing, adding sugar or salt
🗑
|
||||
| how does cooking work? | kills bacteria. food poisoning is caused by food being undercooked
🗑
|
||||
| how does canning work? | killheats food before being canned to kill the bacteria. then sealed in a can to stop any bacteria getting ins bacteriA
🗑
|
||||
| how does vinegar work? | it's an acid. very few bacteria can grow in acid conditions.
🗑
|
||||
| examples of food preserved in vinegar? | pickled eggs, chutney
🗑
|
||||
| how does drying work? | bacteria and fungi can't grow without water
🗑
|
||||
| examples of food preserved by drying? | cereals
🗑
|
||||
| how does freezing work? | kills bacteria or slows their growth
🗑
|
||||
| how does adding sugar or salt work? | kills some bacteria and fungi and stops the growth of others
🗑
|
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:
jirwin
Popular Biology sets