PA Review
B- Biochemistry- Read the clue relating to an important biological molecule, and circle the molecule that matches that clue.
A- make muscles, hair, nails, diease fighting
carbohydrate nucleic acids lipids enzymeproteinphospholipid
B- sugar, starch, cellulose
carbohydrate nucleic acids lipids enzymeproteinphospholipid
C- molecule that has a head and tail, loves and hates water
carbohydrate nucleic acids lipids enzymeproteinphospholipid
D- determines what you look like
carbohydrate nucleic acids lipids enzymeproteinphospholipid
E- Long term energy and insulation
carbohydrate nucleic acids lipids enzymeproteinphospholipid
F- Identify these biochemical molecules
.
1-Draw the structure of an amino acid. Look at your biochemistry section to help you.
2- What organic molecule do amino acids build up to make?______
3- Circle the molecule above that is the disaccharide.
4- The picture that has the phosphate, pentose sugar, and nitrogen base make up which organic molecule?______
D- Energy Flow
1- Is this figure above a food web or food chain?
2-Where is the most available energy?
3- Which organism is the top order carnivore?
4- Which organism is the herbivore?
5- How would the elimination of small fish affect this flow of energy?
E-Cell Transport
1 2 3
Beaker # / Type of Solution(hypertonic, hypotonic, isotonic) / How will water move? / Result to the cell
1
2
3
F- Cell Organelles: a-Label the animal cell with the appropriate organelle names
Name the organelle that has the following functions and characteristics
a- flexible barrier that controls what enters and leaves the cell______
b-regulates activities, “brain” of the cell______
c-makes proteins, can be found floating in the cytoplasm or attached to the E.R.______
d- found in plant cells only, used to make food for plant______
e- packages materials for transport ______
f- powerhouse of cell, break down food to release energy______
G- Cellular Energy
a- Reactants of photosynthesis:a- Reactants of cellular respiration:
b- Products of photosynthesis:b- Products of cellular respiration:
c- Location of photosynthesis:c- Location of cellular respiration:
- Cellular respiration makes the energy molecule named ______.
- How do these two processes (photosynthesis and sell respiration) relate to each other?
H- Defining Elements of a Scientific Method: Using the words provided match each word to a statement below.
Objective (Question) Research Hypothesis Variable Control
Observation Data Conclusion Qualitative Quantitative
1. Factor being tested is the ______.
2. The problem that the laboratory activity is designed to solve ______
3. Gathering information about the subject of the activity before you begin your experiment is
called ______.
4. The final results of a laboratory activity is the ______.
5. Observation that includes numbers. Ex) There are two birds in the tree ______
5. Proposed explanation for a problem or observation is a ______.
6. What the person performing the activity sees, hears, feels, smells, or tastes is called a type of
______
7. Type of observation that does not include numbers. Ex) The tree is green. ______
8. The group you do not change, and use for comparison is called the ______.
9. Measurements are considered a type of ______.
IX- Scientific Method Scenarios
John’s wanted to see if grass composting will help bean plants grow. They planted two flats of bean plants (25 plants/flat) and they were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month-old compost, (b) Flat B: 0 g compost. The plants received the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants (cm).
A. What is the question John is asking?
B. What was John’s hypothesis?
C. What is the dependent variable? D. What is the independent variable?
E. What is an example of one variable he will control in each group?
A scientist is testing how sugar affects the activity level of elementary school students. He sets up two groups of 50 students from the 2nd grade. The scientist gives one group of the second graders a drink with 50 grams of sugar in it. The other group received a drink with no sugar added. He then observed the actions of the students over the time period of an hour, and recorded his data. His data suggested that the children who ingested the sugary drink had more high-intensity activity than the students who just received a no sugar beverage.
A.What is the independent variable?B. What is the dependent variable?
C. What is the control group?D. What is the experimental group?
E. What is the hypothesis that the scientist is testing?
X-Graphing and Analyzing Data- The thickness of the annual rings indicate what type of environmental situation was occurring at the time of its development. A thin ring, usually indicates a rough period of development. Lack of water, forest fires, or a major insect infestation. On the other hand, a thick ring indicates just the opposite.
Make a line graph of the data and answer the following questions.
Age of the tree in years / Average thickness of the annual rings in cm.Forest A / Average thickness of the annual rings in cm.
Forest B
10 / 2.0 / 2.2
20 / 2.2 / 2.5
30 / 3.5 / 3.6
35 / 3.0 / 3.8
50 / 4.5 / 4.0
60 / 4.3 / 4.5
1.What is the dependent variable? ______
2.What is the independent variable? ______
3.What was the average thickness of the annual rings of 40 year old trees in Forest A? ______
4.Which forest would you consider to have survived through more difficult environmental conditions? ______