32. Which substance would be best separated with a magnet?
33. In the table below, list two characteristics of the molecules of solids, liquids, and gases.
32. Iron filings & sand
33. See image
100
30. Look at the pictures above. Once stirred, which substances would NOT maintain their physical properties?
31. Two or more substances that are mixed together that do NOT maintain their physical properties because they blend in together until their grains can no longer be seen are called __________.
30. The kool-aid and the sugar & water
31. solutions
100
28. Look at the pictures above. Once stirred, which substances would maintain their physical properties?
29. Two or more substances that are mixed together that maintain their physical properties and CAN be separated easily are called __________.
28. The iron filings & sand and the water & pepper
29. mixtures
100
Explain how matter changes states.
Freezing, Boiling, Melting Points
100
A student is using each of the materials below to wrap individual glass jars. She is then pouring hot water into the jars. She measured the temperature of the water before pouring it into the jars. Then she measured the temperature of the water in each jar after 5 minutes.
26. What would be a good title for this data table?
27. Explain how you came up with your title.
26. Insulator of Thermal Energy
27. I know that metal and glass are good conductors
200
24. What materials make good insulators of electric energy?
25. What materials make good conductor of electric energy?
24. Rubber, plastic, wood, or cloth
25. Metal
200
21. Which liquid is less dense than water?
22. Which liquid is more dense than water?
23. Why does the paperclip sink and the popsicle stick float?
21. Oil
22. Corn syrup
23. They both have different densities
200
19. Which item is the least dense?
20. Which item is more dense than water?
19. Popsicle Stick
20. Paper Clip
200
17. What is the mass of this item on a triple
beam balance?
18. If I add a can to the triple beam
balance that has a mass of 28.5 grams,
what would be the total mass?
17. Mass: 342.1 grams
18. 342.1g + 28.5g = 370.6g
200
16. Describe a material that makes a good electrical conductor.
Copper is the best type of metal to conduct electricity
300
15. Why are electrical cords wrapped in plastic or rubber?
Plastic/rubber insulates and keeps you from getting shocked
300
14. What makes a good thermal insulator? How do you know that an object is a good thermal insulator?
Rubber, wood, plastic; it holds heat in
300
13. How does salt affect the boiling point and freezing point of water?
Salt raises boiling point to 120°C, lowers freezing point to -20°C.
300
12. You are trying to make ice cubes and the temperature of the water is 43°C. How much does the temperature need to drop to reach the freezing point?
43-0 = 43 degrees
300
11. You are trying to boil water, so you place a thermometer in the pot and it reads 72°C. How many more degrees does the water temperature need to rise in order to reach the boiling point?
100-72 = 28 degrees
400
10. Write the temperature of each thermometer. What is the difference between the two?
42-34 = 8 degrees
400
9. What is the melting point of water in Celsius? What state of matter is it?
Melting Point: 0°C
State of Matter: Liquid
400
8. What is the boiling point of water in Celsius? What state of matter is it?
Boiling Point: 100°C
State of Matter: Gas
400
7. What is the freezing point of water in Celsius? What state of matter is it?
Freezing Point: 0°C
State of Matter: Solid
400
6. Why is it important to have a plastic or wooden handle on a cooking pan?
The handle is an insulator so it protects your hand from the hot pan.
500
5. Describe what happens to sugar or salt when it is dissolved in water.
The sugar or salt particles get smaller in size until they are evenly spread out and cannot be seen anymore. The sugar and salt do, however, maintain their same mass.
500
4. One of these items is less dense than water, soluble in water, and is in a liquid physical state. Which item is it?
Object number 7
500
3. How many objects had a mass greater than 4.3 grams?
5 objects
500
2. Why aren't all metal objects magnetic?
Only certain metals are magnetic. Copper, for example, IS NOT magnetic.