Properties and changes
Types of matter
Density Calculations
Metric Conversions
Scientific method
100
A change in appearance, size, shape, phase, or texture.
Physical change
100
The purest AND simplest substance. Made of atoms.
Elements
100
A cup of water is 200ml in volume and weighs 200g. What is the density?
1g/ml
100
how many grams are in 2 kilo grams?
2000 grams
100
The variable that is changed by the scientist.
independent variable
200
A change in the composition of matter that comprises a substance
Chemical change
200
Comprised of multiple atoms held together by chemical bonds.
Compounds
200
A chunk of metal weighs 21 grams. A graduated cylinder is prepared with 20.0ml of water and after the metal is placed in it rises to 24.5 ml. What is the density?
4.67 g/ml
200
how many meters are in 25 centimeters?
.25 meters
200
The variable that changes in response to a planned change in the experiment. Usually the variable being studied.
dependent variable
300
An example of this would be flammability. The ability to combust.
Chemical property
300
An example of this would be saltwater
Homogeneous mixture
300
What is the mass of 50 cm3 of copper if it's density is 8.7 g/cm3.
435 grams
300
45 grams = ? milligrams
45000 milligrams
300
Parts of experimental design that are identical in each trial so the changes are known to be from the independent and dependent variable.
Constants
400
An example of this would be malleability. The ability for a substance to be molded into a shape.
Physical property
400
Which type of matter can be separated by chemical AND physical means?
Mixtures
400
What is the volume of 25.0 grams of aluminum with a density of 2.7 g/cm3.
9.3 cm3 of aluminum
400
How many milliliters are in .24 kiloliters?
240000 milliliters
400
The variable measured in response to changes made by the scientist.
dependent variable
500
Name the 5 pieces of evidence for a chemical change.
change in color, change in smell, production of a gas, change in temperature, and formation of a precipitate.
500
Identify which boxes are compound, elements, and mixtures.
Elements = A and F
Compounds = D and E
Mixtures = B and C
500
How many kilograms of iron would be needed to build a stand that is 2000cm3. (density is 7.87 g/cm3).
15.74 Kg
500
an aspirin has 200mg of ibuprofen in it tablet. How many kilograms are there per tablet?
.0002 Kilograms
500
We are testing the response of insects to different levels of light. What would the control be for this experiment?
Insects that are exposed to no light.