What is matter?
a) any visible solid that has mass
b) any liquid that takes up space and has mass
c) anything that takes up space and has mass
d) any solid or liquid that takes up space
C
100
Bleach removes stains by:
a) changing the color of the stain
b) covering the stain
c) removing the stain causing substances
d) disinfecting the stain
A
100
How do you calculate the average speed?
Average speed is calculated by dividing the distance traveled, by the time it takes to travel that distance.
100
What is earth's interior made up of?
Several compositional layers.
100
What causes a lunar eclipse?
When a moon passes through the shadow of Earth.
200
What precautions should you take when working with acids?
You should wear safety goggles, gloves, and a labratory apron while working with acids.
200
Grapefruit, lemons, limes, and oranges contain ________ acids. Apples contain ________ acids. Grapes contain ________ acids.
citrus / malic / tartaric
200
What is another common name for potential difference?
Voltage
200
What kind of weather typically results from a cold front?
A cold front often cause high winds & thunderstorms.
200
How does the amount of mass affect the future of the universe?
The amount of mass will determine whether the universe expands forever, reaches stasis or contracts on itself.
300
Where does the chemical energy released in a chemical reaction come from?
Most of the energy that is released in a chemical reaction comes from the stored energy in chemical bonds.
300
Which of the following mixtures is homogeneous?
a) tossed salad
b) soil
c) vegetable soup
d) salt water
D
300
What is the SI unit of power?
The SI unit of power is the watt which is = to 1J/s.
300
What is an ecosystem?
A community of organisms and their abiotic enviroment.
300
What is the closest star to the Earth?
Sun
400
What is the difference between a physical change and a chemical change?
Physical changes do not change the identity of a substance, where as chemical changes do.
400
Why are alkali metals very reactive?
Alkali metals are reactive because each atom has one valence electron that can easily be removed. Thus, they form compounds very easily.
400
An electric current does no exist in:
a) a closed circuit
b) a series circuit
c) a parallel circuit
d) open circuit
D
400
How does the greenhouse effect work?
Certain atmosphere gases keep the earth warm by absorbing radiation from the sun and returning it to Earth.
400
Why does the moon have phases?
Because it revolves around the Earth.
500
What is the relationship between a monomer and a polymer?
A polymer is a molecule that is a long chain of smaller molecules called monomers.
500
Why is sodium iodide so soluble?
Sodium iodide is soluble because the forces between the water molecules and the sodium ions and the iodine ions are much greater than the forces between the sodium ions and the iodine ions in the crystal.
500
How is inertia related to mass?
Inertia is directly related to mass; the larger an object's mass is, the greater its inertia will be.
500
What is the difference between a renewable resources and a nonrenewable resource?
Renewable- a natural resource that can be replaced at the same rate at which the resource is consumed.
Nonrenewable- a resource that forms at the rate that is much slower than the rate at which it is consumed.