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WorksheetsCSA Post Test Prep
Total questions: 20
Worksheet time: 10mins
The nucleus of most atoms is composed of which of the following sub-atomic particles?
tightly packed protons
tightly packed neutrons
tightly packed protons and neutrons
loosely connected protons and electrons
The image shows a model of the atom. Which subatomic particle does the arrow in the image below identify?
electron
proton
neutron
Higgs-boson
Which of the following descriptions correctly describes the structure of an atom?
An atom has a central nucleus that contains protons and electron with neutrons orbiting the nucleus
An atom has a central nucleus that contains electrons and neutrons with protons orbiting the nucleus.
An atom is made up of randomly organized protons, neutrons, and electrons
An atom has a central nucleus that contains protons and neutrons with electrons orbiting the nucleus
Calcium is an element. What is the smallest particle of calcium that has the same chemical properties of calcium?
a proton from a calcium atom
a molecule that contains calcium
an atom of calcium
an electron from a calcium atom
Which element from this portion of the table chemically reacts in a way similar to the way the element chlorine (Cl) reacts?
Oxygen
Iodine
Silicon
Xenon
The following is a small portion of the periodic table. What do all of the elements in group 13 have in common?
They are all the same color
They all share similar physical properties
They all share similar chemical properties
They have the same number of proton
Jayden wants to model how the motion of particles changes with temperature. He considers water in an iron pot. Jayden draws a model to show how the water particles and iron particles move at room temperature. Then, he draws a second model to show how the water particles and iron particles move as the pot of water is heated. How should Jayden’s second model differ from the first?
The water particles should vibrate faster, and the iron particles should not move.
Both the water particles and the iron particles should slide past each other faster
The water particles should slide past each other faster, and the iron particles should vibrate faster
The water particles should move freely in all directions, and the iron particles should slide past each other faster.
Norea draws a model to show how the particles in a liquid appear. Which model (or models) above could be Norea’s drawing of particles in a LIQUID?
model 1
model 3
models 1 & 2
all three models
Cadence and Kauan are trying to classify several objects that they found during a field trip to the beach. They collected a sample of seawater, a piece of driftwood, and several smooth pebbles. What property does the driftwood share with the pebbles that it does not share with the water?
Its particles move freely in all directions.
Its particles vibrate but are locked in place.
Its particles do not move at all
Its particles are attracted to each other and can slide around each other
The theory of a Sun-centered solar system and the theory of evolution caused similar negative reactions when first proposed. Which of the following led to them becoming a scientific theory?
There was no evidence for either theory
Evidence to support both theories were discovered that consistently supported them
Both theories were proposed by more than one scientist
Both theories were tested in a laboratory and results were consistently supported
Scientific knowledge results from the interaction of scientists who are investigating natural phenomena. Which of these best describe how a scientific explanation becomes widely accepted?
A hypothesis is tested repeatedly and the results are confirmed with evidence and debated by the scientific community
A hypothesis is debated by the scientific community
A hypothesis is tested repeatedly and the results of the tests are debated.
A hypothesis is tested repeatedly and the results are partially supported by the scientific evidence.
In 1912, Alfred Wegener proposed the idea of continental drift. The idea stated that Earth’s continents were once joined as a single landmass, as shown in the illustration. Wegener believed that over time, this landmass broke into pieces and drifted apart to form the continents as they are known today. Wegener had evidence to support his idea, most scientists rejected the idea of continental drift because they could not explain how it occurred. Today, however, the theory of continental drift is widely accepted by scientists. Which of the following explains how the theory of continental drift came to be widely accepted?
Scientists found evidence of a pattern in layered rock deposits
Scientists repeatedly found evidence of sea floor spreading in ocean ridges.
More information was discovered about the rock cycle by a scientist studying rock formation.
Scientists believed that all natural processes had to occur everywhere on Earth in the same way.
Which of the following describes a similarity between scientific laws and scientific theories?
Both contain descriptive and detailed explanations of supported hypothesis.
Both are an established universally observable fact.
Both provide explanations of a phenomenon.
Both are well supported by a large body of evidence and believed to be true by most scientists.
The figure above shows how the view of an atom changed over time. Why did this scientific knowledge change over time?
Thomson and Rutherford’s ideas were completely incorrect.
Thomson, Rutherford, and current scientists have different opinions of atoms.
New evidence leads scientists to modify existing models
Older models were based on opinions, whereas current models are based on facts
The result of one experiment carried out by a research team would be considered to be valid if...
everyone on the research team went to college
the experiment had variables
if everyone agreed that they would get the same result
the experiment is repeated many times and the results were the same every time
Four container of water at different temperatures are placed on a table as shown, in a room that has a temperature of 25 oC. After 4 hours, the scientist measures the temperature of each container. Which of the following is the independent variable in this experiment
The amount of water in each beaker
The temperature of the water after 4 hours
A change in temperature of the beakers
The temperature of the water before the 4 hours
By using objects of the same mass, the students can learn about both the effect of the mass and shape
If they do not use objects of the same mass, the students cannot learn about the effect of shape
By using objects of the same mass, the students can learn about the effects of mass
It is NOT important for the objects to have the same mass because the students are not testing the effects of mass
Gavin designed and carried out an experiment about light and plant growth over a specified time period. He displayed his results on the graph shown here. With the teacher's approval, Madeline chose to perform the exact same experiment. What was she trying to accomplish?
Madeline is trying to replicate Gavin's experiment
Madeline is trying to redesign Gavin's experiment
Madeline is trying to analyze the results of Gavin's experiment.
Madeline is trying to beat Gavin’s experiment.
A piece of titanium has a mass of 18g. Using a graduated cylinder partially filled with water, a scientist found that the titanium displaced 4mL of water. What is the density of the titatnium
18 g/cm3
324 g/cm3
4.5 g/cm3
0.22 g/cm3
Kyle is preparing to bake a cake at home and places several ingredients on the counter. First, he preheats the oven to 175 oC, then mixes all of the ingredients together. He pours all the cake batter into 2 pans and bakes for 1 hour. The cake layers are allowed to cool for 15 minutes. At which of the following steps did the chemical change occurred?
Preheating the oven to 175 oC
Baking the cake
Mixing the ingredients
Cooling the layers of the cake
