WorksheetsFinal Study Review
Total questions: 50
Worksheet time: 26mins
Lenny accidentally drops his matchbox car into a graduated cylinder. The car has a mass of 10 grams and the water level in the cylinder rises from 41 ml to 46 ml. Determine the density of the matchbox car. The formula for density is D = mv.
0.5 g/ml
2 g/ml
15 g/ml
50 g/ml
Which safety rule is MOST important when smelling the product of a chemical reaction?
Hold with tongs.
Use a wafting motion.
Wear closed-toed shoes.
Keep nose directly above open container.
Which is true of ionic compounds?
They are good conductors as solids.
They are made by sharing electrons.
They are made of metals and nonmetals.
They are electrically neutral when dissolved in a solution.
Which is true of all covalent compounds?
They share electrons in bonds.
They are electrically charged.
They are good conductors in water.
They are usually made of a metal and a nonmetal.
The periodic table is organized by
atomic mass.
atomic size.
atomic number.
What is the smallest unit that can carry on all functions of life?
cells
molecules
elements
organelles
When two or more substances combine, but each keeps its own properties, the new combination is called a(an)
Element
Mixture
Compound
Homogeneous substance
The atomic number of magnesium is 12. This means that its nucleus must contain
6 protons and 6 neutrons.
6 neutrons and 6 electrons.
12 neutrons and no protons.
12 protons and no electrons.
According to the scale, which of these substances is the strongest acid
NaOH
blood
bleach
lemon juice
Which sub-atomic particle is positively charged and found in the nucleus
proton
neutron
electron
beta particle
Describe the location of non-metals on the periodic table?
middle
upper left corner
lower left corner
upper right corner
A student studies the gathering of frogs at the end of a pond. She has collected data, formed graphs, and now should do what with that information?
experiment
author a procedure
publish her findings
analyze and conclude
While getting a beaker from the shelf, Robert dropped the beaker and it broke. What should Robert do FIRST?
Inform his teacher.
Get a broom and sweep up the beaker
Put on gloves and carry the glass to the trash can.
Carefully place the glass shards inside a separate beaker.
Which measures the mass of an object?
a spring scale (in N)
a height scale (in feet)
a graduated cylinder (in mL)
a triple beam balance (in grams)
Which subatomic particle is NOT found at the center of the atom?
electron
neutron
nucleus
nucleus
What is the identity of the atom shown?
fluorine
neon
nitrogen
potassium
Which two structures are not found in animal cells?
vacuoles and ribosomes
chloroplasts and ribosomes
cell walls and chloroplasts
endoplasmic reticulum and cell walls
When heating a test tube or flask,
it should remain capped.
it should remain in a test tube rack.
safety goggles should be worn for the duration of the experiment.
an experimenter can briefly look directly into the tube to make observations
If there are 4 grams of reactant, how many grams of product are produced by the chemical reaction?
0 grams
2 grams
4 grams
8 grams
Which statement could ONLY be accurately placed within the base circle?
is common in fruit juices
can be found in the stomach
can dissolve a copper penny
includes many cleaners, like bleach
According to the cell theory, where do cells come from?
cells can only come from other, pre-existing cells
cells are formed from the semi-conservative replication of DNA
cells can only arise from the complex chemical environment found in organic solutions
cells come from other cells and, on rare occasions, from the spontaneous action of inorganic enzymes
Brad and Juan conducted several tests to determine the properties of silver metal. They noted that is was white, and conducted both electricity and heat. They computed the density to be 10.49 g/cm3. Silver did not react with water but in nitric acid, gas was released.
What evidence supports a chemical change in the silver?
Silver conducts electricity.
Silver reacts with nitric acid to produce a gas.
The color of silver at room temperature is white.
Silver conducted heat and as the temperature increased, became more malleable.
One difference between mixtures and pure substances is that
mixtures can be physically separated.
mixtures are made of one type of atom.
pure substances have no chemical bonds.
pure substances can be physically separated
To determine the density of an empty plastic jug, you would measure
it on a scale.
it with a ruler.
the mass and volume.
the length and volume.
Rusting metal is an example of a _________ change.
phase
state
chemical
physical
All the elements of a family in the periodic table have what feature in common?
They all have similar chemical properties.
They all have the same number of protons in the nucleus.
They are all located in the same horizontal row or period.
They all have the same number of electrons in the electron cloud.
Which property is an example of a chemical property?
the ability to burn
the ability to melt
the ability to dissolve
the ability to evaporate
In the classification of matter chart, letter A. would be a(n
acid.
compound.
element.
solution.
Which organelle is the powerhouse of the cell, the site of cellular respiration?
2 - nucleus
5 - endoplasmic reticulum
6 - Golgi bodies
9 - mitochondria
Your science teacher has asked the class to make a cell city model. Which building or business in the city could represent the mitochondria, and why?
city dump - waste storage
city hall - control center
roads - transportation system
power company - produces energy
Organisms that use energy from the sun to make their own food are called
carnivores
consumers
omnivores
producers
Based on the pyramid, which organism provides the most available energy?
predator fish
birds and mammals
insects and zooplankton
phytoplankton and bacteria
A student studies the gathering of frogs at the end of a pond. She has collected data, formed graphs, and now should do what with that information?
experiment
author a procedure
publish her findings
analyze and conclude
Susie places 3 beakers in the freezer. The first beaker contains water only, the second contains water and salt, and the third contains a water and sugar solution. Susie recorded the temperature and the time at which each mixture froze, Which is the most appropriate hypothesis for her experiment?
Salt affects teh freezing point of water
the addition of salt raises the freezing point of water
the addition of a sugar lowers the freezing point
the addition of different substances affects the freezing point of water
Clownfish have evolved resistance to the deadly stings of sea anemones. The sea anemone provides protection for the clownfish from predators and leaves the uneaten remains of its prey for the clownfish to finish off. Meanwhile the clownfish helps attract prey to the sea anemone with its bright colors.
The relationship between clownfish and sea anemones is a form of symbiosis called?
mutualism
predation
competition
commensalism
White coat (W) is dominant over tan (w) coat in foxes. When a white-coated male is mated with a tan-coated female, 100% of their offspring are white-coated. What is the genotype of the female fox?
WW
Ww
wW
ww
The graph shows the changes in population of black bears in rural Michigan during a single year. Competition for food among the black bear population was most likely the greatest during the
winter
late summer
late spring
month of June
In the drawing, the gene is located at a specific site on a(n) ______ strand
DNA
QRS
RNA
tRNA
A gene for disease resistance in fir trees is transferred to pine trees using modern DNA technology. How might this be economically helpful to tree farmers?
Abnormal pine tree growth would be eliminated.
Erosion of topsoil would no longer be a concern.
Pine trees would be safe from pine beetle attacks
More pine trees would live to maturity, increasing lumber output
Dr. Bob hypothesizes that drug X causes cuts to heal more quickly. He performs a medical experiment on a group of 100 people and confirms his original hypothesis. In the control group, a 1 cm cut took seven days to heal. In the experimental group, a 1 cm cut took four days to heal. What should Dr. Bob do next?
Repeat the experiment for accuracy.
Begin selling drug X to the public
Write a scientific theory about drug X
Publish the results of the experiment in a scientific journal.
Farmer Brown tests the hypothesis that the more alfalfa sprouts cattle eat, the more milk they produce. He divides his pasture into four fields and puts twenty cattle in each field. Field 1 cows get no alfalfa sprouts, field 2 cows get ten pounds of sprouts per day, field 3 cows get twenty pounds of sprouts, and field 4 cows get thirty pounds. He feeds all groups fifty pounds of regular hay per day, uses the same breed of cattle, and gives them the same amount of water. He measures gallons of milk produced per cow every day.
What is the independent (tested) variable in Farmer Brown's experiment?
The ratio of hay to milk produced.
The number of cattle in each field.
The amount of milk the cows produce.
The amount of alfalfa sprouts the cattle are fed.
A(n) ___________ is a collection of all of the abiotic factors and biotic factors in an entire region.
habitat
ecosystem
community
ecological niche
Which example illustrates commensalism and NOT mutualism?
Hippo dung (feces) is eaten by a large species of catfish native to African lakes. The catfish typically follow the hippo herds
Cattle have protozoa living in their gut that digest cellulose. The cows are able to feed on grass, while the protozoa are sheltered inside the cow.
Oxpeckers remove parasitic fly larvae from the skin of buffalo. In exchange, they are protected from predatory cats, who will not challenge a buffalo
Ants 'farm' aphid insects like cattle. Aphids suck the sap out of trees, which ants also feed on. In turn, the ants sting predators that attack the aphids.
Populations of organisms, such as kudzu and the fire ant, that are introduced into a new habitat and reproduce very rapidly are known as _____________ species.
endemic
predatory
invasive
parasitic
A biology class is conducting an experiment to determine how soil pH may affect the germination of pine seedlings. Three pine seeds are placed in a pot of soil with a pH of 6.5, and three pine seeds are placed in a pot of soil with a pH of 4.0. After one week, the students count the number of seeds which have germinated and determine the mass of each pine sprout. Which of these is the BEST way to improve the accuracy and validity of the data in this experiment?
repeat the experiment with other types of seeds
repeat the experiment using soils of different pH
increase the sample size by using additional pots and seeds
increase the number of independent variables in the experiment
A simple change in DNA results in
a mutation.
cell death.
replication.
an adaptation.
In rabbits, B represents the allele for black coat and b represents the allele for white coat. Black is dominant over white. If a rabbit has the genotype Bb, what is the rabbit's phenotype?
gray
black
white
BB X bb
The four living things seen here, dog, flower, algae, and bacteria, are all made of cells.
A - C are multicellular, but D is unicellular. What do all four have in common?
They are all equally complex
They are all made of at least one cell.
They all have special structures to make food through photosynthesis
They all have exactly the same internal structure
Look at the diagram of the food web. The arrows means “eaten by.” What will happen if the number of snakes goes down?
The owl will eat the grass.
The number of frogs will go down.
The hawk and owl will have less food.
The number of mice and grasshoppers will go up.
Soil quality affects the characteristics of an ecosystem. It determines the type of plants that grow or animals that live in it. What term describes the combination of air, minerals, water and organic compounds found in soil?
texture
composition
particle size
permeability
