Describing Matter
The metal tungsten is used in incandescent light bulbs because of its property of _______.
Electricity.
A molecule is the smallest part of
a.) an element
b.) a compound
c.) a substance
d.) an atom
C.
An object that floats in water has a density of less than 1 g/mL.
True.
Butter is melted in a pan. What type of change is that?
Physical change.
Which of the following is true about matter?
a.) it is a solid that takes up space
b.) it has mass and takes up space
c.) it has mass and is usually a liquid
d.) it is always has a substance
B.
What combination forms compounds.
Chemical.
What is the formula is for density?
Mass/volume.
What is thee energy stored in the bonds of atoms called?
Chemical energy.
Another term for the ability to burn is _______.
Flammable.
Substance in a mixture keep their own properties.
True.
The amount of matter in object is ______.
Mass.
_______ energy naturally flows from warmer matter to cooler matter.
Thermal.
A ________ is a single kind of matter that has a specific composition.
Substance.
Salad dressing is a homogeneous mixture.
False. Heterogeneous.
The SI unit of volume is the kilogram.
Cubic meter.
What type of change releases energy?
Exothermic.
Which of the following is not true about a pool of water and a piece of ice?
a.) they have the same composition
b.) they are in different states of matter
c.) they have different chemical properties
d.) they have different physical properties
C.
The chemical symbol for water is H2O.
False. Symbol.
The SI unit of mass is the cubic meter.
Kilogram.
How are new substances produced?
Chemical change.