Science 7 Sample Review Questions (Unit 2: Topics 5 & 6)
1. We made juice in Science class and it tasted great. It was a solution that had just the right mixture of juice crystals and water. What kind of a solution did we create? Dilute, concentrated, saturated, or unsaturated? Circle one.
2. Orange juice from concentrate (in a can) is an example of a concentrated solution. What does this mean in terms of the amount of solute/solvent in the mixture?
3. What is the term given to the amount of solute (in grams) that can be dissolved in a certain amount of solution?
4. What is the unit of measurement of concentration?
5. Which of the following is more concentrated? A solution of 10g of drink crystals dissolved in 50 mL of water, or a solution of 25g of drink crystals dissolved in 100mL of water?
6. If a saturated solution has a concentration of 20g per 100mL of water, how many grams of the solute could be dissolved in 50mL of water?
7. Why are solutes generally able to dissolve faster in hot water than in cold water? Use the Particle Theory of Matter to support your answer.
8. When solute particles do not bind with solvent particles, the solutes are considered _________________.
9. What is hard water?
10. List two disadvantages to using hard water.
11. True or false: Glass is a pure substance.
12. Identify at least two raw materials used in making glass.
13. What is the difference between pig iron and steel?
14. True or false: Soap is a type of detergent.
15. What is a surfactant?
16. Name two components of toothpaste and explain their purpose.
17. What is meant by the term biodegradable?
18. What is sewage?
19. List one benefit and one drawback of using livestock manure as field fertilizer.
6 comments:
Miss Campbell I don't understand what you are saying in #3 "What is the term for th amount of solute (in grams) that can be dissolved in certain amount of solution" Please explain this to me at school before he quest. Thanks!!!!! :) :) :)
what ?s are for home work
hey miss campbell i dont really understand #3:"What is the term given to the amount of solute (in grams) that can be dissolved in a certain amount of solution?" i dont understand what u mean by that. could you plz explain to me what you mean? thanks =P
Olivia and Courtney. The amount of solute (in grams) that can be dissolved in a certain amount of solution is called its concentration - remember that we measure it in g/100mL.
Alyssa - these questions are for your own review for the test. The other questions that are for homework can be found a couple posts back.
Happy studying to all, and to all a good night!
Miss Campbell Curtney told me that brenna said that you talked to brenna and said that section three was due this report card. Is this true ??? I tried to get on my online theory at home and it doesn't work. :( wat should i do ????
Hi Olivia - Section 3 for theory is due by April 15th so you still have a couple weeks to catch up if your marks had been wiped out earlier. As for accessing the program from home, my guess is that you have the old URL. The one that works is:
www.canadianband.ca/onlinetheory/moodle2/moodle
Try loading that page, then choosing SK/AB version, signing in with lastnamne.firstname and your password, and give me a shout if you're still having trouble!
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