Heat energy flows from ________objects to ___________objects.
warmer, cooler
100
How many sig figs are there in 72.503
five
100
Write 0.00602 in scientific notation.
6.02 x 10 ^-3
100
A proposed explanation of observations is a(n)
theory
100
Convert 23*C to Kelvin.
296K
200
Specific heat is the amount of heat energy needed to raise the temperature of _______________ of a substance 1K.
1 gram
200
How many sigs figs in 760?
two
200
In doing scientific notation, how many nonzero digits should be before the decimal point?
one
200
What is the value for absolute zero?
0K
200
3 darts strike near the center of a target. Whoever threw the darts is what?
a. both accurate and precise
b. accurate
c. neither accurate nor precise
d. precise
a. both accurate and precise
300
What is the law when energy can't be created or destroyed?
The Law of Conservation of Energy
300
Multiply 3.72 by 4.5 and provide the answer to the correct amount of sig figs.
17
300
Write 3,760,000 in scientific notation.
3.76 x 10^6
300
Out of the following, which is not a model?
a. globe
b. plastic water molecule
c. soccer ball
c. soccer ball
300
True or false. In a physical change, the substances composition changes.
False. A chemical change is when the substances composition is changed. Remember composition is what it is made up of.
400
You are holding a snowball in your hand and watch it melt. This is an exchange of heat energy. The snowball is considered endothermic or exothermic?
endothermic
400
What is the volume of a solid with dimensions 1.27cm, 1.3cm, and 2.5cm?
4.1 cubic centimeters
400
Divide 32 x 10^7 by 16 x 10^3 (I realize that this isn't correct scientific notation, just deal with it.)
2.0 x 10^4
400
A testable statement used for making predictions and carrying out further experiments is a(n)
hypothesis
400
What is the density of an object when the volume is 15.5mL and the mass is 56.11g? Remember sig figs!
3.62 g/mL
500
Explain why the temperature will not increase above 100*C when you boil water.
During phase changes the temperature will remain constant until all of the liquid becomes a gas.
500
Round 0.03607 to two sig figs.
0.036
500
Multiply 6.02 x 10^23 by 9.1 x 10 ^-31
5.5 x 10^-7
500
Briefly describe a controlled experiment.
A controlled experiment is when you only are changing one variable.
500
Why could someone have poor precision when using laboratory equipment?
Measuring instrument might be off and have limitations. There could be human error.