multiple choice
a. The average kinetic energy of the atoms in an object determines it___________.
b. If the amount of energy required to boil a pot of water were added to a swimming pool, the water in the pool would.............
a. temperature
b. changes very little
a. The ability to cause change is_______.
b. Exothermic reactions________.
a. energy
b. releases energy
a. boiling point is 100oC what is the degrees in fahrenheit?
b. Freezing point is 32oF what is the degrees in celsius?
a. 212oF
b. 0oC
Compare and contrast exothermic and endothermic.
Both are chemical exothermic releses energy, endothermic absorbs energy.
a. The conversion of carbon dioxide and water to oxygen and sugar in photosythesis is an example of a(n)_______.
b. To change the rate of a chemical reation in a beaker you can do all of these except ______.
a. endothermic reaction
b. Lift the beacker
a. The bouncing rubber ball has each of the following except________.
b. As a snowflake falls, it________.
a. heat
b. Loses potential energy and gains kinetic energy
c. Current temp is 10oC what is the degrees in fahrenheit?
d. Fahrenheit=Celsius -40oC what degrees in fahrenheit?
c. 50oC
d. -40oF
50oC is what in fahrenheit
122oF
a. Materials that do not transfer heat easily are_____.
b. The transfer of energy from warmer to cooler objects is known as_____.
a. insulators
b. heat
a. At 0oC on the Celsius temperature scale,______.
b. The scientist who described the law of conservation of energy is_____________.
a. water freezes
b. Joule
How does the heat from coffee change when poured into a coffee cup?
The heat from the coffee flows into the cup.
which of the two cans has more potetial energy?
the higher one because it has a longer fall.
a. In a chemical reaction, it takes energy to______.
b. An example of an exothermic reactions is ______.
a. break chemical bonds
b. the explosion of dynamite
a. An example of heat transfer by convection is the____.
b. Kinetic energy plays a role in each of the following EXCEPT a_______.
a. Formation of air currents
b. skier standing at the top of a hill
What happens to the temperature of the coffee?
The temperature of the coffee decreases.
if both cans are pushed off the shelves with equal force which package will have more kenetic energy?
the higher one because there is more potenrial than kinetic energy
a. The total amount of energy in the universe____.
b. In a chemical reaction,____.
c. The motion of atoms in all directions in solids, liquid, and gases is called______.
a.remains the same
b. Compounds are broken down, new compounds are formed
c. convection
a. Radiation involves the transfer of energy by______.
b. The spring inside a moving wind up toy has_____.
c. How does an exothermic reation take place when some kinds of cookie dough are baked?
a. waves
b. both potential and kinetic energy
c. Baking soda absorbs energy and produces gas that makes the cookies rise
a. What happens to the temperature of the coffee cup?
b. By what means does the transfer of energy take place?
a. The coffee increases the temperature of the coffee cup.
b. The transfer of energy takes place through the means of conduction.
Explain the law of conservation of energy
energy that cannot be created or destroyed it can be transforms from one form to another