Science Junior cert
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Name the two elements that water is made of | Hydrogen and Oxygen
🗑
|
||||
| What is the chemical formula for water ? | H2O
🗑
|
||||
| What would you use to test for water? | Cobalt chloride paper
🗑
|
||||
| What is the freezing point if water? | 0C
🗑
|
||||
| What is the boiling point of water? | 100C
🗑
|
||||
| Water is an ------------------- solvent | Excellent
🗑
|
||||
| What is the first stage of the water cycle? | Evaporation of oceans
🗑
|
||||
| What happens in the second stage of the water cycle | Condensation to form clouds
🗑
|
||||
| What happens in the third stage of water cycle | Rainfall
🗑
|
||||
| What do you call the water treatment step that involves the removal if large debris through a wire mesh | Screening
🗑
|
||||
| What do you call the water treatment step that allows medium size particles to settle at bottom | Settling
🗑
|
||||
| What do you call the water treatment step that involves passing the water over sand and gravel | Filtration
🗑
|
||||
| What do you call the water treatment step that involves the addition of chlorine to kill bacteria | Chlorination
🗑
|
||||
| What do you call the water treatment step that involves the addition of flourine compounds to help prevent tooth decay | Fluoridation
🗑
|
||||
| The purest form of water is called what?. | Distilled water
🗑
|
||||
| Water always contains ------------------solids | Dissolved
🗑
|
||||
| Water that does not lather easily is called what? | Hard water
🗑
|
||||
| Water that does lather easily is called what? | Soft water
🗑
|
||||
| What causes hardness in water | Calcium ions
🗑
|
||||
| What is limestone more commonly known as | Calcium carbonate
🗑
|
||||
| What do you call the process that removes the calcium ions from hard water | Ion exchange
🗑
|
||||
| What do you call the bead like material that you pass the hard water through to remove the calcium ions | Ion exchange resin
🗑
|
||||
| Is the water that passes through the ion exchange resin, hard or soft water | Soft water
🗑
|
||||
| What do you call the water that has been passed through the ion exchange resin | Deionised water
🗑
|
||||
| What do you call the production of a chemical reaction by electricity | Electrolysis
🗑
|
||||
| What is the name of the apparatus used to used in electrolysis | Hoffman Voltameter
🗑
|
||||
| Why do you add acid to the water in electrolysis | To conduct electricity
🗑
|
||||
| What is formed as a result of electrolysis | H2 and O2
🗑
|
||||
| Why is there twice as much hydrogen gas as oxygen gas produced in electrolysis | Because each water molecule has two hydrogen atoms and one oxygen atom
🗑
|
||||
| How would you determine if water samples were hard or soft | Add soap solution and shake to see if a lather (bubbles) form
🗑
|
||||
| How would you prove that water contains dissolved solids | Evaporate the sample and solids will be left behind on the clock glass
🗑
|
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:
gcu science
Popular Science sets