Chemical or physical change
What is at least one characteristic of a chemical change?
- cannot go back to it's original form
- a new substance has formed
- physical signs include heat, sounds, bubbling, or a precipitate form.
This describes the smell of a substance.
What is odor
How do we describe density?
How do we define color?
The way something looks.
True or false: the elements or molecules that are created in a reaction are called the reactants.
What is false.
What is at least one characteristic of a physical change?
- change in the state of matter
- can easily be reversed (mostly)
- no new products are formed
Which term describes the ability for a substance to burn or lack of.
What is flammability.
How do we find/solve density?
What is mass divided by the volume.
This term is described as the smallest pure substance that can be combined to create molecules.
What is an element.
True or false: We use a bar graph to represent data over time.
What is false.
Is the following example a physical or chemical change: liquid water freezing into solid ice.
What is physical change.
Define mixture.
A combination of 2 or more substances.
Describe at least one way we can find the volume of an object.
What is multiplying the length, width, and height or by finding the water displacement.
This describes the amount of water that an object pushes aside equaling out to its own volume.
What is water displacement?
What was the catalyst in the elephant toothpaste experiment?
What is the warm water and yeast mixture.
Is wood burning in a fire an example of a physical or chemical change?
What is chemical change.
Define solubility
the ability for a substance to dissolve.
Solve for the density. Volume = 13 ml ; mass = 3.3 grams
Density = 0.25 g/ml
What word or phrase best describes the definition: 'matter cannot be created or destroyed'
What is the conservation of mass.
How many elements are in a water molecule? What are the elements names?
What is 2 elements. Hydrogen and Oxygen.
What is an example of a chemical and physical change occurring in the same example?
What is a candle burning.
This term is described as the smallest unit in a chemical compound.
What is molecule.
Find the density of the object.
Mass = 71 grams
Length = 21 cm ; Width = 3 cm ; Height = 1.2 cm
Density = 0.94 g/ml (cm^3)
What is the definition for a catalyst?
A substance that speeds up a chemical reaction without being consumed or permanently changed in the process.
What is an example of data we could use to help determine if a chemical reaction is occurring?
What is the mass, density, volume or temperature.