Matter and Density Quiz

Matter and Density

• Matter: Anything that takes up space and can be weighed.
• Mass: The amount of matter in an object. It doesn't change regardless of location (e.g., Earth, Moon). Measured in grams (g) or kilograms (kg).
• Weight: The measure of the gravitational force on an object. It changes depending on gravity. Measured in ounces (oz), pounds (lb), or tons (t).
• Volume: The amount of space an object takes up. Measured in milliliters (mL), liters (L), or cubic centimeters (cm³).
• Density: The amount of mass in a given volume. Calculated as Mass / Volume. Commonly measured in grams per cubic centimeter (g/cm³).

Key Concepts

• Mass vs. Weight: Mass remains constant, while weight changes based on gravity.
• Floatation and Sinking: An object floats if its density is less than the liquid's density; it sinks if the object's density is greater.
• Density and Floating/Sinking: Less dense objects float, more dense objects sink.
• Predicting Floatation: If an object's mass (in grams) is less than its volume (in cm³), it will float. If the mass is greater, it will sink.
• Density of Liquids: A less dense liquid will float on top of a more dense liquid. A liquid sinks if it has a higher density than the liquid it is placed in.

Units

• Mass: Grams (g), Kilograms (kg)
• Weight: Ounces (oz), Pounds (lb), Tons (t)
• Volume: Milliliters (mL), Liters (L), Cubic Centimeters (cm³)
• Density: Grams per cubic centimeter (g/cm³)