7th Grade PAP Science 2015-2016
Benchmark Exam Review 1
CHNOPS AND ELEMENT COUNTING
1. Define organic compound.
Compounds that contain a Carbon/Hydrogen bond and are found in all living things
can be classified as an organic compound.
2. Is the compound organic or inorganic?
Compound
Organic or Inorganic?
H2SO4
Inorganic
CO2
Inorganic
C6H12O6
Organic
CHCl3
Organic
CHNa03
Organic
NaCl
Inorganic
ClO2
Inorganic
H2O2
Inorganic
3.
What are the common elements that are commonly found in organic compounds?
Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous, and Sulfur (CHNOPS)
5. The chemical formula for a mineral known as Hematite is Fe2O3. Is this mineral an organic or inorganic
compound? Explain how you know.
The mineral is an inorganic compound because it does not contain a carbon hydrogen
bond and we also know minerals are not living things.
6. Complete the chart below by stating how many elements are found in each compound:
Compound
Number of ELEMENTS
Total Atoms
H2O
2
3
CHCO3
3
6
CO
2
2
C6H4N2O
4
13
C6H12O6
3
24
DICHOTOMOUS KEYS
28. Use the dichotomous key given below to identify the following 2 organisms. For each
organism, list the steps in the boxes provided below the dichotomous key that you went
through to identify the animal. The first two steps have been done for you for the first
organism.
ORGANISM 1
ORGANISM 2
1. a. Organism is living........................................................go to 4.
1. b. Organism is nonliving..................................................go to 2.
2. a. Object is metallic........................................................go to 3.
2. b. Object is nonmetallic..................................................ROCK.
3. a. Object has wheels......................................................BICYCLE.
3. b. Object does not have wheels......................................TIN CAN.
4. a. Organism is microscopic...................................PARAMECIUM.
4. b. Organism is macroscopic............................................go to 5.
5. a. Organism is a plant.....................................................go to 6.
5. b. Organism is an animal.................................................go to 8.
6. a. Plant has a woody stem..............................................go to 7.
6. b. Plant has a herbaceous stem.................................DANDELION.
7. a. Tree has needle like leaves.....................................PINE TREE.
7. b. Tree has broad leaves............................................OAK TREE.
8. a. Organism lives on land................................................go to 9.
8. b. Organism lives in water...............................................CLAM.
9. a. Organism has 4 legs or fewer......................................go to 10.
9. b. Organism has more than 4 legs...................................ANT.
10 a. Organism has fur........................................................go to 11.
10 b. Organism has feathers................................................ROBIN.
11 a. Organism has hooves.................................................DEER.
11 b. Organism has no hooves............................................MOUSE
ORGANISM 1 IDENTIFICATION STEPS:
Step 1: 1a
Step 2: 4b
Step 3: 5b
Step 4: 8a
Step 5: 9a
ORGANISM IDENTIFICATION STEPS:
Step 1: 1a
Step 2: 4b
Step 3: 5b
Step 4:8b CLAM
Step 6:10b ROBIN
29. Use the terms in the box and label the leaves with all characteristics that apply.
Leaf characteristics
A. Compound
E.Lobed Leaves
B. Simple
C. Needles
D. Scales
G. Unlobed Leaves
B, G
A, G
C
A, G
B, E
A, C
Cells
1.
Name the 3 points of the Cell Theory and provide examples of each?
1. Cells are the basic units of structure and function in living things (cells
do everything necessary for life, eat, make energy, create and get rid of waste)
2. All cells come from preexisting cells (cannot get living things from nonliving matter)
3. All living things are made of one or more cells (every organism is either
unicellular (bacteria/amoeba) or multicellular (plants/animals)
2. What organelle contains the genetic material in a cell?
The Nucleus holds all of the genetic material of an organism.
What is the genetic material called and what is its purpose?
Chromosomes have strands of DNA that hold genes. The purpose of this genetic
information is to control what the organism will look like and how it will
function when it is fully developed. It also allows it to have a variety of
information to pass to its offspring.
3.
Define organelles.
Organelles are the parts of the cell that perform the functions necessary for life.
4. How does the shape of a plant and animal cell differ?
Plants cells are a rectangular or box shape and Animal cells come in many shapes but
are usually shown round.
5.A. What piece of lab equipment is used to view cells?
Microscopes are used to view cells.
B. What do you do to that equipment if you want to view the cell bigger?
You must turn the nosepiece to a higher powered objective to view the cell larger.
Complete the chart below:
Cell Part
Picture
Animal
Plant
Prov provides the cell with
Cell Wall
Not Present
support and structure
during changes in
water pressure
Prov Allows things to go in
Cell Membrane
and out of the cell.
Same as animal cell.
Helps the cell to
maintain homeostasis.
Prov Holds genetic material
Nucleus
(DNA/Chromosomes)
Same as animal cell.
and is considered the
“brain” of the cell.
s.
Prov A jelly-like substance
that holds all the
Cytoplasm
organelles in place
Same as animal cell.
and provides support
to the cell.
s.
Mitochondrion
Makes Energy from food
for the cell.
Same as animal cell.
Photosynthesis (the
process of taking
Chloroplast
Not Present
the sun’s energy
and making food)
takes place here
Multiple vacuoles. Store
Vacuole
One large vacuole. Stores
nutrients, water
water, nutrients
and waste
and waste. Helps
plant cells keep
their shape.
The Nucleus – Reproduction, Heredity and Natural Selection
Which type of reproduction will result in genetic variation? WHY??
Sexual reproduction results in genetic variation because of all of the possible
combinations that can be formed with having 2 parents with a different set of traits.
Define genetic variation.
Genetic variation is the ability of a species to have multiple differences due to a
variety of genetic combinations.
. Define heredity.
Heredity is the passing of traits from parent to offspring.
24. In terms of heredity and inherited traits, describe why birds and insects are different?
Birds and insects inherit different traits and that makes them different. Birds get
traits like feathers and beaks while insects pass on exoskeletons and stingers.
25. Describe 2 inherited traits and 2 environmental traits.
Two examples of inherited traits are hair color and eye color and two environmental
traits would be pierced ears and wrinkles from sun exposure.
26. If a child inherits a dominant gene from Mom and a recessive gene from Dad, which
gene will show the trait?
When a child inherits different genes from its parents the dominant gene will cover
the recessive gene and be shown.
27. Explain the difference between genotype and phenotype.
Genotype is the genetic makeup of an organism and the phenotype is the physical
appearance of the organism.
What is the result of selective breeding?
Selective breeding results in a species having more similarities due to humans
choosing traits they find most appealing.
Describe how natural selection changes a population.
Natural Selections changes a population by only allowing the organisms with the best
traits for survival to reproduce.
Place the following descriptions into the category that they best fit
1. Genetic Variation
7. Offspring have a combination of DNA from the
parents
2. Involves one parent
8. Involves two parents
3. Kittens
9. Regeneration
4. Flowering Plants
10. Offspring will be identical to parent
5. Offspring will be unique
11. Inherited traits
6. DNA is passed from parent to offspring
12. Uniform genetic material
Sexual Reproduction
Asexual Reproduction
Both
2, 9, 10,
12
4, 6, 11
1, 3, 5, 7,
8