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Worksheets8th Grade Science Review #1
Total questions: 54
Worksheet time: 47mins
What organelle do plants have surrounding their cells that animals lack?
Cell Wall
Woody Stems
Cell Membrane
Sharp Thorns
When many organ systems work together it can form...
organ
cells
organism
organ system
Which organelle is only found in a plant cell?
nucleus
chloroplast
mitochondria
cell membrane
Directs all cell activities through the DNA located there.
Lysosomes
Nucleus
ribosomes
Mitochondria
You might think of me as the trash collector, but recycler is maybe more accurate. What am I?
mitochondria
vacuole
lysosome
ribosome
What is found in both plant and animal cells but is much larger in plant cells?
Nucleus
Mitochondria
Chloroplast
Vacuole
I am the outer most layer of an animal cell. What am I?
cell wall
cell membrane
nucleus
Cell Skin
What is the gel-like substance inside of cells called?
photoplasm
cytoskeleton
photosynthesis
cytoplasm
Which of the following is not part of the cell theory?
cells must contain DNA
all living things are made from cells
cells can only come from other cells
cells are the basic unit of life
Which structures are found in every living cell?
cell membrane and cytoplasm
chloroplasts and mitochondria
a cell wall and nucleus
chloroplasts and cell wall
Which organ system takes in oxygen and releases carbon dioxide?
Chemical system
Respiratory system
Circulatory system
Endocrine system
The digestive system converts food into usable
nutrients
muscles
energy
Plants use the sunlight to make their own food. Therefore, plants are
Producers, which produce energy for the rest of the ecosystem
Consumers, consuming other living things in an ecosystem
predators, top of the food chain
Which organisms make energy available to all other organisms in a food chain?
consumers
decomposers
producers
Which of the following is an example of a predator?
Wolf
Owl
Snail
Plant
Abiotic or Biotic: An insect
Abiotic
Biotic
Abiotic or Biotic: Water
Abiotic
Biotic
How many producers are in this food web?
1
2
3
4
What Is natural selection?
living things adapt to their environment to survive and produce more offspring
Living things eat and hunt lesser creatures so they are not the one eaten
The way natural works on its own
Changes in physical structure, function, or behavior that allow an organism to survive
Adaptation
Mutation
Camouflage
Interdependence
Coloring of markings that help or organism blend in with its surroundings
Adaptation
Trait
Camouflage
Mutation
Based on these properties, which element is most likely a nonmetal?
Element 1
Element 2
Element 3
Element 4
Which statements correctly compare metals and nonmetals?
F
G
H
J
A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?
F
G
H
J
Which statements best describe the charges on the particles in this model?
If a fluorine atom has a mass number of 19, how many neutrons are in the atom?
How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
Click on the visual for the question.
Sodium and Lithium have similar chemical properties. What characteristics of these elements explains why they are chemically similar?
Atoms of which two elements are represented by these two models?
Oxygen, O, and Neon, Ne
Fluorine, F, and Neon, Ne
Silicon, Si, and Phosphorous, P
Beryllium, Be, and Boron, B
Which pair of elements has reactivity that is similar to Chlorine, Cl ?
Fluorine, F
Sulfur, S
Iodine, I
Argon, Ar
Atoms of which two elements have a combined total of 23 protons?
Boron, B
Carbon, C
Sodium, Na
Magnesium, Mg
None of these
In this model, which particle determines the reactivity of the atom?
W
X
Y
Z
None of them
Which element has the same number of energy levels as Lithium?
Beryllium
Sodium
Magnesium
Potassium
Which element has chemical properties that are most similar to the chemical properties of Sulfur, S ?
Silicon, S
Chlorine, Cl
Selenium, Se
Phosphorus, P
Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?
Boron, B
Aluminum, Al
Fluorine, F
Cesium, Cs
Chlorine, Cl
One of the properties that makes Copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity? (a)
Based on this information, the element could NOT be a member of which group on the periodic table?
Group 2
Group 8
Group 12
Group 18
Based on the data given, the unknown metal is most likely--- (a)
The students most likely have which type of rock? (a)
Which process describes only a physical change? (a)
Click on the image for the question.
F
G
H
J
Click on the image for the question.
F
G
H
J
Which substance listed in the chart is made up of the most atoms?
Carbonic acide
Nitric acid
Phosphoric acid
Sulfuric acid
The table shows the physical properties of bleach, oven cleaner, vinegar, and carpet cleaner. Which physical property best categorizes vinegar in a separate group from the oven cleaner?
solubility in water
color of solution
melting point
boiling point
Look at the organisms pictured here. How are these organisms classified?
different domain, same kingdom
different domain, different kingdom
same domain, same kingdom
same domain, different kingdom
You are part of a class that is investigating acceleration. You are responsible for designing and experiment to determine how mass affects the acceleration of different objects. All of the groups in the class will use your plan to investigate different objects and then the class will combine all of the results. Which of the following describes the most important part of your job?
you need to create the same data tables and graphs for all the groups so that the class can easliy compare the result
you need to make sure each group collects the same data and reaches the same conclusion
you need the class to write as many scientific questions about acceleration as possible
you need to plan a single procedure for all groups to follow
Ralph decided to dive to the movies in his car. After he stopped at the traffic light, he accelerated onto the highway and then drove at a constant spee to 60 mph. Which of the following graphs BEST represents this information?
Different cell organelles have different functions. Which type of cells would most likely have the most mitochondria.
cells in the stomach lining that make digestive enzymes
nerve cells that transmit signals to the brain stem
muscle cells in the leg muscles of a runner
red blood cells that transport oxygen
If a geologist thinks that they have uncovered a location that contains ancient rocks, which of the following methods would be the BEST way to measure the age of rocks?
measure the amount of weathering present on the surface of the rocks
measure the amount of each radioactive element present in the rocks
measure the percentage of each mineral that makes up the rocks
measure the thickness of rock layers that cover the rocks
Use the facts in the picture to answer the question: Which evidence would MOST likely weaken the researcher's conclusion that this was a new species of snake?
another very similar snake is discovered in a different county
a snake expert disputes the characteristics identified by the researcher
another unknown snake is discovered in Laos
the researcher finds four other identical snakes in Laos
There are eight planets in our solar system. Those planets orbit the sun at varying speeds and distances. Venus and Mercury are the only planets in our solar system that do not have moons. Which of the following BEST explains why Venus and Mercury do not have moons?
Venus and Mercury have no gravity
Venus and Mercury are too hot to keep moons in orbit
Venus and Mercury travel too quickly around the Sun to attract moons
Venus and Mercury are too close to the Sun's gravity at attract moons
A population is composed of individual organisms. Which of the following is an example of genetic variation within a population of birds?
several organisms with broken wings
individual organisms with broken legs
organisms with different sized beaks
population of identical bird beaks
Rust is the process of iron combining with oxygen. Why is the formation of rust considered a chemical change?
rust has greater chemical reactivity than oxygen
rust has properties that differ from both iron and oxygen
rust has the same chemical composition as iron
rust has a very high melting point
