Matter & Mass
Is Matter and Mass the same thing?
no
Is breaking a glass a physical change or a chemical change?
Physical change
Are there different types of electricity?
yes
What happens when magnets attract?
They move toward each other
(True or False) we usually eat the fruit of a pineapple tree.
True
What are the three main states of matter?
Solid, liquid, and gas
What is a physical change?
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.
What is electricity?
Electricity is the flow of electrical power or charge
Is metal always magnetic?
no
What is the rock cycle, and how does it work?
The rock cycle is a web of processes that outlines how each of the three major rock types—igneous, metamorphic, and sedimentary—form and break down based on the different applications of heat and pressure over time. For example, sedimentary rock shale becomes slate when heat and pressure are added.
How do you use Mass
If we know the density and volume of an object, we can find its mass using the formula: Mass = Density × Volume.
What is the difference between a chemical process and a physical process in chemistry?
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.
Name the two types of electrical current
There are two kinds of current electricity: direct current (DC) and alternating current (AC).
Will two magnets attract or repel if one side of the magnet is negative and the other side of the other magnet is positive?
They will attract
How has the surface of the Earth changed over time?
Wind, water, and ice erode and shape the land. Volcanic activity and earthquakes alter the landscape in a dramatic and often violent manner. And on a much longer timescale, the movement of earth's plates slowly reconfigures oceans and continents.
How can matter change from one state to another?
Changing states of matter occur when matter loses or absorbs energy
What are 3 examples of physical and chemical changes?
Physical
Chemical
Explain what static electricity is.
Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.
(True or False) Every magnet has a north pole and a south pole
True
What does an analysis of the rocks in an area tell you about the history of that area?
Rocks tell us a great deal about the Earth's history. Igneous rocks tell of past volcanic episodes and can also be used to age-date certain periods in the past.
What are some examples of how matter changes state in everyday life?
Examples of matter changes are: Melting (changing from solid to liquid). Freezing (changing to a solid from a liquid). Evaporation (changing from liquid to gas).
What are some examples of how physical and chemical changes state in everyday life.
Physical changes in matter are often reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. Chemical changes, on the other hand, are not reversible: A log burned in a fire turns to ashes, but the ashes cannot be changed back into a log.
What are some examples of how electricity state in everyday life.
Various electrical devices (e.g., overhead lights, lamps, television, microwave, toaster, radio, hair dryer, computer, mobile phone, tablet, fan, etc.)
What are some examples of how Magnetism state in everyday life?
A Compass. We use compasses to find directions; essentially, to find the magnetic north, the rest of the directions can be identified if we know the north alone
What are some examples of how earth science state in everyday life.
Earth science affects our everyday lives. For example, meteorologists study the weather and watch for dangerous storms. Hydrologists study water and warn of floods. Seismologists study earthquakes and try to predict where they will strike.