What is Chemistry
_____ is the study of the composition of matter and the changes that matter undergoes.
What is Chemistry?
Solid, liquid, and gas.
What are the three phases of matter?
A physical blend of two or more components, each of which retains its own identity and properties
What is a Mixture?
A characteristic of a substance that can be observed or measured without changing the identity of the substance.
What is a physical property?
Write 3200 in scientific notation
*any group member must be able to explain how they got the answer*
3.2 x 103
Anything that has mass and takes up space.
What is matter?
The atomic level of this phase of matter (Ms. Rea has to draw on the board)
What is solid?
The classification of: a burrito
What is a heterogenous mixture?
The three clues that a chemical change has occurred.
What is energy transfer, production of gas, and color change?
Write 0.0000101 in scientific notation
*any group member must be able to explain how they got the answer*
1.01 x 10-5
The study of materials that do not contain carbon (ie nonliving things).
What is Inorganic Chemistry?
The bulk level properties of this phase of matter are indefinite shape and definite volume
What is the liquid phase?
The classification of: water
What is a compound?
The Law of Conservation of Mass states that
What is...
Mass is neither created nor destroyed, Mass of reactants is equal to mass of products, atoms are rearranged in a chemical change
Describe the precision and accuracy of the following measurements of someone's height (actual height = 5.7 ft)
7.1, 7.2, 7.1, 7.0
Hight precision
Low accuracy
The branch of chemistry that deals with: Studying how energy is transferred from the sun to plants in photosynthesis.
What is Physical Chemistry?
Name three intensive properties of a copper pan.
What is:
Conducts electricity, Magnetic, Shiny, malleable, copper-colored,...
How one separates a heterogenous mixture of a liquid and a solid
What is filtration?
or What is phase of matter?
List the reactants and products, then find the missing mass for Na2Cl2.
22g 2Na+18g Cl2 → 30g 2NaCl+ ? gNa2Cl2
What is...
Reactants: 2Na, Cl2
Products: 2NaCl, Na2Cl2
10g of Na2Cl2
Write your final answer in scientific notation:
(6.0 x 10-6) x (4.0 x 104) =
*any group member must be able to explain how they got the answer*
2.4 x 10-1
(NOT 24 x 10-2)
Identify the following parts of the scientific method in this experiment (observation, hypothesis, independent variable, dependent variable):
Sofia noticed that her houseplants seemed to grow faster when placed near a window, sparking her curiosity: "How does light exposure affect plant growth?" To investigate, she set up three identical plants in different light conditions: one in direct sunlight, one in partial shade, and one in complete darkness. Sofia measured each plant’s height at the start of the experiment and then recorded their growth over four weeks. She proposed that the plant receiving the most sunlight would grow the tallest. After the experiment, she analyzed the growth data and found that the plant in direct sunlight grew significantly taller than the others.
Observation: "houseplants seemed to grow faster when placed near a window"
Hypothesis: "She proposed that the plant receiving the most sunlight would grow the tallest"
Independent Variable: Light exposure
Dependent Variable: Plant height
A book has a greater volume than a sticky note because of this.
What is the book occupies more space?
Sodium (Na), Chlorine (Cl), Chlorine gas (Cl2) and sodium chloride (NaCl) are all examples of these.
What are substances?
48g Butane (C4H8) combusts to form 12g carbon monoxide, 18g carbon dioxide and an unknown amount of water.
How much water forms in this chemical reaction?
*Tiebreaker* write the chemical equation
What is 18 grams of water
C4H8 --> carbon monoxide + CO2 + H2O
Write your final answer in scientific notation:
(5.5 x 10-3) - (5.0 x 10-4) =
*any group member must be able to explain how they got the answer*
5 x 10-3