Vocab
What is Conductivity
the measure of a material's ability to conduct electric current or heat
Boiling water is a _________
Physical change
Rusting iron is a _____ change
Chemical
What is a compound?
Why are mass and weight different?
Because mass is what you are made of and weight is mass with the force of gravity pulling you down. Therefore, your mass stays the same on every planet but your weight changes with the gravity.
Endothermic
When energy is absorbed from the surroundings. Making the object or substance feel cold.
Burning paper is a ____ change
Chemical change
Baking a cake is a _____ change
Chemical
What is a homogeneous mixture?
A mixture of two or more substances that is evenly distributed and has uniform composition.
What is volume defined as?
The amount of space and object takes up
Exothermic
When energy is released from the object into the surroundings. This makes the object feel warmer to touch.
Mixing salt and water creates a Physical or chemical change?
Physical change
Malleability and ductility are examples physical or chemical changes?
Physical
Give an example of a heterogeneous mixture?
Chex mix, Sand and Iron, Mud and water etc. Anything you can seperate physically and is easily distinguishable.
What object would someone measure volume with?
Beaker, graduated cylinder, pipette etc.
What are properties?
Properties are like characteristics or traits.
Solubility is the ability to ______
Dissolve
Combustibility is?
How easily a substance catches fire
Is this an element, compound, or a mixture?
"NaCl"
Compound
If Mass is 10 grams (g) and Volume is 120 cm^3. What is the object's density?
.083 g/cm^3
Are humans endothermic or exothermic?
Endothermic. We regulate our body heat through metabolic processes internally.
Is flammability a physical or chemical property
Chemical. Because it creates a new identity.
Mixing mentos in Coke is a ____ change
Physical. The CO2 was already present, so no new substances were created.
What is a pure substance?
Has a constant composition and uniform properties throughout and is made of only one type of atom (an element) or one type of molecule (a compound)
If an object has a density of 100 g/cm^3 and a Mass of 30g. What is the object's Volume?
0.3 cm^3