1)Define Matter: Anything That Has Mass and Occupies Space

Chemistry Chp 1 Rev WS Answers

1)Define matter: Anything that has mass and occupies space.

2)Define chemistry: study of “matter”, its composition, properties, and the changes it undergoes.

3)List the FIVE traditional areas of study in chemistry. Give an EXAMPLE of what each area would look at:

A. Organic Chemistry – Understand how plants undergo photosynthesis.

B. Analytical Chemistry- amount of lead in water.

C. Inorganic Chemistry- test how different metals conduct electricity.

D. Biochemistry- Test how nutrient absorption works.

E. Physical Chemistry- Testing the rate of rusting on different metals.

4)Give an example of PURE and APPLIED chemistry.
Pure Chemistry – mix different chemicals/elements to see what happens.

Applied Chemistry – Research more efficient/different fuel options.

5)Using ONE word, describe macroscopic and microscopic. List an example of each.
Macro = big, ex = person Micro = small, ex = atoms

6)WhatScientific Method – You notice that American Godzilla is smaller and weaker than Japanese Godzilla. List the steps of the scientific method and what you would do for each step to test this.
Observe – Am Godz is smaller and weaker than Jap Godz.
Hypothesize – Jap Godz is closer to more nuclear power plants than Am. Godz.
Test – Hatch baby Godz.s close to NPP and far from them.
Conclusion – NPP effectGodz. Growth.

7)What is the relationship between a hypothesis and observation?
A hypothesis is an informative explanation for an observation

8)According to your experiment in problem 6, what was the independent and dependent variables?
Independent variable – Number of NPP.

Dependent variable – Growth

9)A theory is a well testedexplanation for a set of observations.
Theories are subject to change though.

10) A scientific law summarizes the results of many observations and experiments.
It does not explain - it just tells the relationship.

Chemistry Chp2 Review WS Answers

1. What are the three states of matter?

Solid, liquid, gas

1. Fill in the table below with “Definite” or “Indefinite”
   
2. What are TWO extensive and intensive properties of strawberry jello?

Extensive – Mass, volume, weight

Intensive – Color, density, consistency.

1. What is the difference between physical change and chemical change? Give one example of each.

Physical – changes substance, but not the composition Ex) boil, freeze, melt, cut
Chemical – Substance(s) turn into a brand new thing Ex) Iron + O2 = rust, cooking

1. Explain the law of conservation of mass with an example.

The mass of sea water before boiling = mass of salt + steam after boiling.

1. What is the difference between a mixture and a compound?
   Mixture = physical blend Compound = chemical blend
2. What is the difference between a heterogeneous & homogeneous mixture?
   How are they similar? Examples of each?
   Hetero – composition not uniform throughout - soup.
   Homo – composition uniform throughout – salt water.
   Similar – both are physical mixtures
   
3. If I wanted to separate the solid (precipitate) out of my solution, I would use __filtration____.
   If I wanted to separate the sugar out my lemonade, I would use ___distillation_____.
4. Give an example of an element. What makes it an element?

Al, can’t be separated into anything simpler.

1. Label each arrow with either PERIOD or GROUP

Period 
Group

1. Match the following. Each option will get TWO letters.

__EF___Heterogeneous mixture / A. H2O
__BG___Homogeneous mixture / B. Salt water
__AC___Compound / C. C6H12O6
_DH____Element / D. Si
E. Pepper water
F. Chocolate Chip Cookie
G. Green tea
H. P