MATTER
What is the definition of MATTER?
Anything that has mass & takes up space.
What is the equation used to calculate Density?
D = M/V
Why is molding clay considered a physical change?
It only changes its shape.
What's the best way to know if a Chemical Change has occurred?
If the composition changes & a new substance is formed.
What is the equation to find volume of a regular solid?
length x width x height
What is the Metric Unit used to measure MASS?
Kilogram (kg), Gram (g), or Milligram (mg)
What units of density are best for a solid?
g/cm3
Fruit ripening is an example of what kind of change?
Chemical Change
How is heat involved in Chemical Changes?
Heat is either absorbed or released.
What units would you use to measure the length of an ant?
Millimeters (mm)
Which property of matter is a measure of gravitational force?
Weight
Density describes the relationship between what 2 things?
Mass & Volume
Why is freezing water considered a physical change?
The water only changes its state.
Souring milk is an example of what kind of change?
Chemical Change
What units would you use to measure liquid volume?
Milliliters (mL) or Liters (L)
What metric units are used to measure the volume of an irregular solid?
cubic centimeters (cm3)
Why does ice float on top of liquid water?
Ice is less dense than liquid water
What kind of change is exploding fireworks, and how do you know?
It's a Chemical Change because it forms new substances & it's irreversible.
Baking a cake is what kind of change, and how do you know?
Chemical change because new substances form and it's irreversible.
What units would you use to express the density of a liquid?
g/mL (grams per milliliter)
How is Weight different than Mass?
Weight can vary depending on location.
What is the density of 7mL of a liquid with a mass of 14g?
2.0 g/mL
What kind of change is melting crayons, and how do you now?
It's a Physical Change because it only changes state and is reversible.
What are the 2 chemical properties?
Flammability & Reactivity
A 20g object has a length of 10cm, width of 2cm, and height of 1cm. What is its density?
1 g/cm3