Apply Its_Middle School Physical Science - Mastery Assess It_4

10/20/2016 Apply Its_Middle School Physical Science Mastery Assess It_4

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Mastery Assess It 4

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1. What is the density of an object that has a mass of 60 grams and a volume of 20 cm3?

a. 2 gm/cm3 Great effort, but density = mass/volume.b. 1 gm/cm3

Great effort, but density = mass/volume.c. 3 gm/cm3

You are correct! You did the math perfectly!d. .5 gm/cm3

Great effort, but density = mass/volume.

2. Calculate the volume of a box with a length of 20 centimeters, width of 10 centimeters, and height of 40 centimeters.

a.

Great effort, but remember, volume is length x width x height.

b.


c.

You are correct! You did the math perfectly!

d.


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3. Which is the correct formula to calculate the mass of an object?

a.

You are correct! The mass of an object may be calculated by dividing weight by the force of gravity!

b.

Great effort, but if weight is the force, and gravity is the acceleration in the formula f = m x a, how would you find the mass?

c.

Great effort, but if weight is the force, and gravity is the acceleration in the formula f = m x a, how would you find the mass?d. The correct answer is not shown.

Great effort, but if weight is the force, and gravity is the acceleration in the formula f = m x a, how would you find the mass?

4. Use the formula to calculate the gravitational force on a ball that has a mass of 20 kilograms and is accelerating due to gravity (9.8 m/s2). F = mass X acceleration due to gravity

a. 20 N

Great effort, but do you remember the formula for a force? F=MA. If you plug in the values for mass (20 kg) and acceleration due to gravity (9.8),you will arrive at a different answer.

b. 196 N You are correct! Using the formula F = MA, you used the formula to correctly calculate the answer!c. 9.8 N


d. 200 N


5. Which standard of measurement is expressed in cubic units?

a. Mass Great effort, but mass is measured in grams. It is a onedimensional unit.b. Volume

You are correct! Volume consists of 3 dimensions: length, width, height.c. Weight

Great effort, but weight is measured in grams. It is a onedimensional unit.d. none of the above

Great effort but one of the answers above is correct.

6. Density can be found by dividing the mass of an object by its volume. Use the formula to calculate the density of an object that has a mass of 40grams and a volume of 20 cubic centimeters. Remember: volume is expressed in cubic units.

a. 2 g / You are correct! You did the math perfectly!

b. 20 g /

Great effort, but remember that density is expressed in cubic units, not squared units. I think you may have made a mistake with the math as well.Check your calculation and try again!

c. 2 g / Great effort, but volume is expressed in cubic units.



7. If a book weighs 10 pounds on Earth, how much will it weigh in space?

a. 2 pounds Great effort, but remember a book has weight because of gravity, and gravity is 9.8 m/s/s. b. 0 pounds

You are correct! The book would have almost no mass in space.c. 10 pounds

Great effort, but remember a book has weight because of gravity, and gravity is 9.8 m/s/s. d. 5 pounds

Great effort, but remember a book has weight because of gravity, and gravity is 9.8 m/s/s.

8. If your weight is 130 pounds on Earth, what would it be on Mercury?

a. It would be more because Mercury has greater gravity than Earth. Great effort, but remember the difference between mass and weight. One includes gravity and the other does not.b. It would be less because Mercury has less gravity than Earth.

Correct! Weight changes with gravity, but mass does not.c. It would be the same, 130 pounds.

Great effort, but remember the difference between mass and weight. One includes gravity and the other does not.d. none of the above

Great effort, but remember the difference between mass and weight. One includes gravity and the other does not.

9. In the Metric System of Measurement, mass and weight are measured in which units?

a. ounces and pounds Great effort, but ounces and pounds are the standard units of measurement.b. liters and milliliters

Great effort, but liters and milliliters are metric units used to measure liquid volume.c. grams and kilograms

You are correct! The metric units for weight and mass are grams and kilograms!d. meters and kilometers

Great effort, but meters and kilometers are metric units used to measure liquid volume.



10. Study the diagram below and select the correct formula for finding the volume of a cone:

a.

Great effort, but this is the formula for calculating the volume of a pyramid.

b.

You are correct! As shown in the diagram, this is the formula for finding the volume of a cone!

c.

Great effort, but this is the formula for calculating the volume of a cylinder.

d.

Great effort, but this is the formula for calculating the volume of a sphere.

11. What is the difference between weight and mass?

a. Weight is a measure of the pull of gravity on an object, while mass is a measure of how much matter is contained in an object. You are correct! Weight is a measure of the force of gravity exerted on an object, while mass is a measure of how much matter is in an object!b. There is no difference.

Great effort, and while mass and weight are nearly identical in most places on earth, weight can change in space or on other planets. c. Mass will change in space, but weight will remain constant.

Great effort, but mass is constant, but weight, on the other hand, can change in space. d. Correct answer not given.

Great effort, but there is a correct answer shown.



12. Why is volume always expressed as a cubed unit?

a. because three measurements are added to get volume Great effort, but three measurements are multiplied, not added to get the volume of an object. b. because there are three units of measurement for volume

Great effort, but cubic units are used because there are three values that are multiplied together to get the volume of an object. c. because object always have three sides

Great effort, but many objects have more than three sides, and other objects are round, or of other irregular shapes. d. because three measurements are multiplied to calculate volume

You are correct! Weather standard or metric units are used, there are always three measurements that are multiplied to get volume!

13. Length times width times height is the formula for which unit of measurement?

a. Volume You are correct! The formula for volume is length x width x height.b. Weight

Great effort, but weight is not measured by length, width, or height.c. Mass

Great effort, but mass is measured in grams, and only consists of one dimension.d. The correct answer is not shown.

Great effort, but there is a correct answer.

14. What is the metric unit for volume?

a. the kilometer Great effort, but the kilometer is a large metric unit for distance. A kilometer is equal to 1000 meters.b. the pound

Great effort, but the pound is the standard unit for weight. Standard units are used in the United States, while metric units are used in the rest of theworld.

c. the meter Great effort, but the meter is the metric unit for length, or distance.d. the cubic centimeter

You are correct! The metric unit for volume is the cubic centimeter. For liquid volume, the metric unit is the liter.

15. If your mass on earth is 65 kilograms, what would it be on Pluto?

a. 55 kilograms Great effort, but remember the difference between mass and weight. One includes gravity and the other does not.b. 50 kilograms

Great effort, but remember the difference between mass and weight. One includes gravity and the other does not.c. 60 kilograms

Great effort, but remember, the difference between mass and weight. One includes gravity and the other does not.d. 65 kilograms

Correct! Mass does not change. Weight includes gravity, which is why weight changes with a change in gravity.

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