Physcial properties/change
Describe what a physical property is?
observable or measurable characteristics that can be used to describe and classify substances.
What happens when you turn on a light bulb?
Chemical to Electrical
Electrical to Light and Heat
Mechanical to Electrical
Electrical to Thermal
Electrical to Light and Heat
True/False Hydrogen is an acid
True
True/False this is an example of chemical change; wax melts as it absorbs heat from a flame
False
The formula for density is mass/volume. What would be the volume in milliliters of 100 grams of vegetable oil if the density of the oil is 0.5g/mL?
200 milliliters
Which of the following is not a physical property
A.Boiling point
B.Thermal conductivity
C.Mass
D.Density
C
In a car engine, what transformation occurs to gasoline?
Kinetic to Thermal
Solar to Mechanical
Chemical to Electrical
Chemical to Kinetic and Thermal
Chemical to Kinetic and Thermal
How would you best classify water?
A.It is an element because it is made from a pure substance.
B.It is a solution because it is a homogenous mixture of different compounds.
C.It is a mixture because it is composed of more than one molecule.
D.It is a compound because it is made of a single kind of molecule.
D
A candle burning is a chemical change. True/False
True
How do the particles in a liquid move?
vibrate, move about, and slide past each other
What is Solubility
Solubility is a property of a substance that describes its ability to dissolve in a given solvent
When coal is burned to generate electricity, what is the primary energy transformation?
Thermal to Mechanical
Solar to Electrical
Mechanical to Thermal
Chemical to Thermal and Electrical
Chemical to Thermal and Electrical
Halogens are all on the seventh column of the periodic table. Why are these halogens apart of the same group?
What is evidence that a chemical change has taken place?
Carbon dioxide, water, and ash are produced
The matter shows signs of rusting
A substance emits heat and light
True/False All the ingredients were soluble in water when placing one tea bag in each cup of hot water and then adding one teaspoon of honey and three heaping teaspoons of sugar.
True
#6
What are pieces of evidence that tell you a physical change is happening?
Melting an ice cube
Crumpling a paper bag
Chopping wood
Boiling water
Change in size, shape, and sometimes color of matter
No new substances created
No bonds broken or formed
No change in chemical composition
Texture change
Change in state of matter
Change in color
Change in odor
Change in solubility
What transformation is primarily seen in a battery-powered fan?
Thermal to Chemical
Mechanical to Electrical
Chemical to Electrical
Electrical to Mechanical
Electrical to Mechanical
What is at least one property of an atom?
All atoms of a particular element are identical.
Atoms have the ability to vibrate and move.
Atoms have three subatomic particles.
True/False Baking a cake is a chemical reaction
True
How does heat flow
From the hot object to the cold
Freeze dried candy is an example of physical change?
True
What type of energy transformation occurs when a hawk eats a mouse and then uses the energy from the mouse to fly
mechanical energy to chemical energy
thermal energy to mechanical energy
chemical energy to mechanical energy
mechanical energy to thermal energy
chemical energy to mechanical energy
What do the group (vertical rows) tell us about the elements on the periodic table?
Reflect the organization of electrons in atoms.
Elements in the same group have similar properties.
Have identical valence electron counts and valence vacancy counts
True/False Changing State is an example of chemical change
False
What are the three forms of heat transfer and describe how heat flows
Conduction- direct touch
Convection- Hot air rises cool air falls
radiation- electromagnetic waves