Grade 8 Science: Understanding Density
This worksheet covers fundamental concepts of density, including its definition, formula, and how to calculate it for various objects. It aligns with Grade 8 physical science curriculum.
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Grade 8 Science: Understanding Density
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Density is defined as the of a substance per unit .
2. The formula for density is D = / .
3. Objects with a higher density than water will , while objects with a lower density will .
4. Which of the following units is commonly used for density?
grams per liter (g/L)
kilograms per meter (kg/m)
grams per cubic centimeter (g/cm³)
milliliters per gram (mL/g)
5. A block of wood has a mass of 150 grams and a volume of 200 cm³. What is its density?
1.33 g/cm³
0.75 g/cm³
30000 g/cm³
50 g/cm³
6. A rock has a volume of 25 cm³ and a mass of 75 grams. Calculate its density. Show your work.
7. Explain why a large log floats in water, even though it is very heavy.
8. Density is an intensive property, meaning it does not depend on the amount of substance.
True
False
9. If you increase the temperature of a substance, its density will always increase.
True
False
10. Draw a simple diagram showing two objects in a beaker of water: one that floats and one that sinks. Label them with appropriate densities (e.g., D=0.8 g/cm³ and D=1.2 g/cm³).
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