Game-2

1. Game-2

2. Question-1 What is matter? Matter is anything that has mass and volume. Click Click

3. Question-2 List 3 types of physical changes. • Change of state • Dissolution • Deformation Click Click

4. Question-3 List 5 types of chemical characteristic properties. 1.Acid/base (litmus paper) 2. Contains hydrogen (lit splint) 3. Contains oxygen (glowing splint) 4. Contains carbon dioxide (limewater) 5. Contains water (cobalt chloride paper) Click Click

5. Question-4 List 4 types of chemical changes. • Synthesis • Decomposition • Oxidation • Precipitation Click Click

6. Question-5 Which ones are chemical changes? Iron rusting. A gas is released when acid is placed on copper. Ice melting. Egg cooking. Wood burning When copper is heat it changes colour and mass. All except c Click Click

7. Question-6 What is the formula for density and what is the unit for density? p = m/v (g/mL or g/cm³) Click Click

8. Question-7 Given 5 kg of a liquid whose volume is 5000 mL, what is its density? What is this liquid? 1g/mL , water Click Click

9. Question-8 What is the formula for concentration and what is the unit for concentration? c = m/v (g/L) Click Click

10. Question-9 You are to prepare a 500 mL salt solution with a concentration of 25g/L. What mass of salt will you need? 12.5g Click Click

11. Question-10 What is the formula for dilution? C1V1 = C2V2 Click Click

12. Question-11 You have 250 mL of a 50 g/L solution. You are asked to diluted the solution to a concentration of 10 g/L. How much water must you add to accomplish this? 1000 mL Click Click

13. Question-12 Balance the following equation: ___H2O2  ___H2O + ___O2 3H2O2  3H2O + 3O Click Click

14. Question-13 What is pressure? Pressure is the force applied per unit of area. Click Click

15. Question-14 What is the formula used to calculate pressure and what is its unit? P = F/A (pascals) Click Click

16. Question-15 A 2000cm by 3000cm box, with a mass of 6kg is placed on a table. What is the pressure exerted by the box on the table? 10 Pa Click Click

17. Question-16 What would happen to pressure if you do the following thing? The mass of an object increases. The surface area increases. The volume increase, and the temperature remains the same. The temperature increase, and the volume remains the same. 1,4 Pressure increases 2,3 Pressure decreases Click Click

18. Question-17 What is the 1st general principle of pressure of fluids? A fluid naturally flows from a zone of high pressure to a zone of low pressure. Click Click

19. Question-18 Explain what happens if a balloon rises into the atmosphere. The pressure inside the balloon remains the same, as the pressure on the outside decreases (remember there is less air molecules as you go up into the atmosphere, so the atmospheric pressure decreases). By the 1st general principle of pressure of fluid, the high pressure inside the balloon will want to flow out to the low pressure, so the balloon will increase in volume. The volume of the balloon gets so big, it will eventually burst. Click Click

20. Question-19 There are two holes in a coke bottle. Why does the soda squirt out further in the bottom hole? There is more water above the bottom hole, so that means more pressure and so the water squirts out more at the bottom hole. Click Click

21. Question-20 Explain why it is not recommended that a person with high blood pressure not travel in an airplane? This is similar to the balloon - the arteries is like a balloon and can burst causing a heart attack. Click Click

22. Question-21 Why does a cup of water not spill if you cover it with a piece of paper, and flip it over? Remember atmospheric pressure (pressure from the air) is pushing on the paper, so as to balance out the pressure from the water. Hence, the water does not spill out. Click Click

23. Question-22 Why does a coke can crush if you heat it up and place it in ice water? As the can heats, the water inside the can turns into water vapour and the water molecules starts to spread out and the pressure decreases. Putting the can in the ice cold water, causes the water vapours to suddenly condense, and move in closer together , which creates an open space. The low pressure inside the can cannot support the high pressure from the air, so the can gets crushed. Click Click

24. Question-23 What would happen to you if you scuba dive too deep into the ocean? There is a greater mass of water on top of you, so the pressure increases and the high pressure crushes you. Click Click

25. Question-24 Why do your ears get blocked when you fly in an airplane? This is the same as the balloon – your ear drums are like the balloons, as you fly up, the air pressure decreases and the pressure in your body is high. Therefore, your ear drums swell and your ears get blocked. Click Click

26. Question-25 What is a wave? A wave is a disturbance that travels through a medium like water, air or the ground. Click Click

27. Question-26 Which wave has the most energy and why? The second wave because the shorter the wavelength the more the energy. Click Click

28. Question-27 Label the amplitude and wavelength of this wave. Wavelength Amplitude Click Click

29. Question-30 List the type of radiations in the electromagnetic spectrum from starting with the one with the shortest wavelength. Radio waves, microwaves, infrared radiation, visible light, ultra-violet light, x-rays, gamma rays Click Click

30. Question-31 Which type of radiation would be used? Remote controls Cancer treatment Night vision goggles Cell phones • Infrared radiation • Gamma rays • Infrared radiaton • microwaves Click Click

31. Question-32 Which type of radiation would be used? Radios Airport scanners Detecting fake money Light bulbs • Radio waves • X-rays • Ultra-violet light • Visible light Click Click

32. Thank God! End of Game-2