FLVS (Florida Virtual School) Pre-test Module 1
1. Answer the following questions about two different colored cubes. A pink cube has one side of 8cm and a mass of 24g. A green cube has one side of 6cm and a mass of 20g. Which one has more matter and a higher mass? *
A. The green cube
B. The pink cube
2. Answer the following questions about two different colored cubes. A pink cube has one side of 8cm and a mass of 24g. A green cube has one side of 6cm and a mass of 20g. Which one has a higher product of its sides? *
3 points
The green cube
The pink cube
3. Two samples of wallpaper, 27 grams and 54 grams, are cut out from a roll. Which of the following properties is different for the two? *
3 points
Amount of matter
Color
Density
Electrical conductivity
4. A student has a laptop cord that is 10-meter-long and made of copper wire having a density of 8.9 grams per cubic centimeters. The student then cuts the cord into 5 equal parts. What is the density of each small part? *
3 points
One-tenth of 8.9 grams per cubic centimeters since density is an intensive property
One-tenth of 8.9 grams per cubic centimeters since density is an extensive property
8.9 grams per cubic centimeters since density is an intensive property
8.9 grams per cubic centimeters since density is an extensive property
19. A student takes 5 gram sample of sulfur powder that has a melting point of 115.2 °C. What is the melting point of a 100-gram sample of sulfur powder? *
3 points
115.2 °C since melting point is an extensive property
Double of 115.2 °C since temperature is an extensive property
115.2 °C since melting point is an intensive property
Double of 115.2 °C since melting point is an intensive property
20. Which substances are likely to float in water? *
3 points
Spoon
Styrofoam cup
Pencil
Scissors
Wood
Glass
21. Object A and Object B have the same boiling points. Are they the same substance? *
3 points
Yes
No
22. Object A and Object B have different melting points. Are they the same substance? *
3 points
Yes
No
23. Object A and Object B have different solubility points. Are they the same substance? *
3 points
Yes
No
24. Object A and Object B have the same volumes but different masses. Are they the same substance? *
3 points
Yes
No
(Continued)
25. The data in the chart below was collected during an experiment. What is the dependent variable? *
3 points
Captionless Image
Your answer
26. The data in the chart above was collected during an experiment. What is the independent variable? *
3 points
Your answer
27. The data in the chart below was collected during an experiment. What is the dependent variable (outcome variable)? *
3 points
Captionless Image
Your answer
28. The data in the chart above was collected during an experiment. What is the independent variable? *
3 points
Captionless Image
Your answer
29. The data in the chart below was collected during an experiment. What is the dependent variable? *
8 points
Captionless Image
Your answer
30. The data in the chart above was collected during an experiment. What is the independent variable? *
8
To answer these questions, you will need to understand the concepts of matter, mass, density, melting point, boiling point, and solubility. Here are the steps to find the answers to each question:
1. To determine which cube has more matter and a higher mass, compare the mass of each cube. The cube with the higher mass has more matter. In this case, compare the mass of the pink cube (24g) and the green cube (20g). The pink cube has a higher mass, so the answer is B. The pink cube.
2. To find which cube has a higher product of its sides, calculate the product of the side lengths for both cubes. Compare the products to determine which one is higher. Calculate the product of the side length for the pink cube (8cm x 8cm = 64cm^2) and the green cube (6cm x 6cm = 36cm^2). The pink cube has a higher product, so the answer is The pink cube.
3. To determine which property is different for the two wallpaper samples, compare the given properties: amount of matter, color, density, and electrical conductivity. The properties of color and electrical conductivity are not provided for the two samples, so you can eliminate those options. Compare the amount of matter (27g and 54g) and density. The amount of matter is different for the two samples, so the answer is Amount of matter.
4. To find the density of each small part after cutting the cord, divide the original density by the number of parts. The original density is given as 8.9 grams per cubic centimeter. Since density is an intensive property, dividing the density by the number of parts would give the density of each small part. Divide 8.9 grams per cubic centimeter by 5. The density of each small part is 1.78 grams per cubic centimeter. Therefore, the answer is One-tenth of 8.9 grams per cubic centimeters since density is an intensive property.
5. To determine the melting point of a 100-gram sample of sulfur powder, use the given melting point of a 5-gram sample. Since the melting point is an extensive property, it does not change with the amount of substance. Therefore, the melting point of a 100-gram sample of sulfur powder would still be 115.2 °C. So the answer is 115.2 °C since melting point is an extensive property.
6. To figure out which substances are likely to float in water, remember that objects with a lower density than water will float. Compare the densities of the given substances: spoon, Styrofoam cup, pencil, scissors, wood, and glass. Styrofoam cup, wood, and glass have lower densities than water, so they are likely to float. Therefore, the answer is Styrofoam cup, wood, and glass.
7. To determine if Object A and Object B are the same substance, compare their boiling points. If they have the same boiling point, it suggests that they are the same substance. So, the answer is Yes.
8. To determine if Object A and Object B are the same substance, compare their melting points. If they have different melting points, it indicates that they are not the same substance. So, the answer is No.
9. To determine if Object A and Object B are the same substance, compare their solubility points. If they have different solubility points, it suggests that they are not the same substance. So, the answer is No.
10. To determine if Object A and Object B are the same substance, compare their masses and volumes. If they have the same volumes but different masses, it indicates that they are not the same substance. So, the answer is No.