Properties and Changes
Physical properties are (and give an example)
What is...
characteristics of a substance that can be measured or observed without changing what the substance is
Example: color
Chemistry is
What is how different chemicals and substances react with one another?
Molecules are (and give an example)
What is made up of two or more atoms held together by bonds?
Smallest particle of a substance that has all physical and chemical properties
Ex. carbon dioxide
Define scientific notation
What is...
Standard scientific notation represents a number as a factor multiplied by a power of 10
Example: 3,560,000 is expressed as 3.56 × 106.
This is useful for very large and very small numbers, especially in non-SI units.
Fill in the matter diagram
What is...
Matter
Pure substance Mixture
Element/Compound Homogenous/Heterogenous
Chemical properties are (and give an example)
What is...
describes how a substance behaves during a chemical reaction into something new
Example: flammability
Matter is
What is anything that takes up space and has mass?
commonly: solids, liquids, gases, and plasma
The difference between a pure substance and a mixture is that (and given an example of each)
What is....
a pure substance is made up of only one kind of a particle (carbon) while a mixture is made up of two or more substances that are not chemically combined (no reaction) (milk)
Define sig figs
What are...
specific digits within a number written in positional notation that carry both reliability and necessity in conveying a particular quantity
DOUBLE JEOPARDY
Fill in the atom structure diagram
What are...
Electron Orbits, Electron, Neutron, Proton, Nucelus
Physical Change is (and give an example)
What is...
The substance stays the same, even though it might look different; changing appearance but not chemical composition
Example: boiling water
The basic building block of all matter
What is an atom?
Elements are different from compounds because (and give an example of each)
What is...
Elements contain only one type of atom (gold) while compounds contain two or more types of atoms (water)
Are the underlined zeros significant or not:
1. 4300
2. 0.000270
3. 0.3024
4. 8, 392, 300.0
What are...
1. no
3. no
3. yes
4. yes
Record the correct number of significant figures
What is...
Thermometer A: 21.7 °C
Thermometer B: 21.64 °C
Chemical Change is (and give an example)
What is...
The substance actually transforms into a new substance with different properties; hard to reverse
Example: burning wood
DOUBLE JEOPARDY
Three basic types of subatomic particles
What are...
- proton (positively charged)
- neutron (neutral charge)
- electron (negatively charged)
The difference between heterogenous mixtures and homogenous mixtures (given an example of each)
What is...
Homogenous mixtures are evenly distributed and in a single phase (salt water)
Heterogeneous mixtures are not blended smoothly and often occur in two phases (soup)
State the number of sig figs in each number:
1. 5,391
2. 0.0049203
3. 654.
4. 13, 000
5. 65,072
What are...
1. 4
2. 5
3. 3
4. 2
5. 5
Name these indicators, what type of change (physical or chemical), and what they indicate
1. pH paper, chemical change, acidity/basicness of a substance
2. phenolthaline, chemical change, turns pink in basic solutions
3. iodine, chemical change, turns blackish-purple in the presence of sugar/starch
The 5 signs of a chemical change
What are...
Production of an odor
Change in color
Change in temperature
Formation of bubbles
Formation of a precipitate (solid)
The difference between mass and weight
What is...
Weight involves the factor of gravity?
Fill in the diagram of colloids, suspensions, and solutions
What is...
- settle upon standing: no, no, yes
- separate using filter paper: no, no, yes
- scatter light: no, yes, yes
Perform the following operations and record your answer with the correct number of significant figures:
1. 52.3 miles + 34 miles
2. 17.5 cm x 4.0 cm. x 7.552 cm
3. 490.2 kilograms - 34.112 kilograms
4. 73 m/s x 61.331 s
5. 539 cm / 4 cm
What are...
1. 86 miles
2. 530 cm3
3. 456.1 kilograms
4. 4500 m
5. 100 cm
Fill in the master matter diagram
See Google Classroom answer key