Worksheets2025 1st quarter assessment
Total questions: 56
Worksheet time: 1hrs 28mins
What are the main parts of a Bohr Diagram?
Nucleus, electrons, and electron shells.
Protons, neutrons, and molecules.
Atoms, ions, and compounds.
Energy, mass, and volume.
How does the Bohr Diagram help in predicting how atoms behave? (DoK Level 3)
By showing the likely locations of electrons, which helps us understand chemical behavior.
By showing the color of atoms.
By displaying the temperature of atoms.
By indicating the speed of light.
What should you do after filling the K shell with electrons in a Bohr Diagram?
Continue drawing each shell and filling with electrons until all electrons are accounted for.
Erase the diagram and start over.
Add protons to the shells.
Stop drawing, as the diagram is complete.
Altogether, how many electrons does this atom have?
16
8
6
12
Label the parts of an atom.
Which image shows a Bohr model for Carbon.
What charge do protons have?
positive
negative
no charge
depends on their location in the atom
How many neutrons are there in the most common isotope of Boron? (a)
The number of energy shells in a lithium atom are (a)
How many valence electrons are shown in this Bohr diagram?
2
3
5
8
How many valence electrons?
5
6
7
8
How many atoms of hydrogen are in this compound?
1
2
3
4
How many atoms of hydrogen are in
C6H12O6
6
12
18
2
How many atoms of oxygen are in
3Fe2O3
6
9
18
2
What is the chemical formula for this molecule?
H1O2
H1O1
HO
H2O2
A substance made up of atoms of two or more different elements joined by chemical bonds
Molecule
compound
polar covalent bond
nonpolar covalent bond
The total amount of matter is not created or destroyed.
Law of conservation of mass
chemical equation
subscript
coefficient
The number in front of a chemical equation that multiplies the number of atoms.
Law of conservation of mass
chemical equation
subscript
coefficient
The number written to the lower right of an element that tells you the number of atoms.
Law of conservation of mass
chemical equation
subscript
coefficient
Found on the right side of a chemical equation.
products
reactants
subscript
coefficient
Found on the left side of a chemical equation.
products
reactants
subscript
coefficient
three hydrogen (H)
one sulfur (S)
four oxygen (O)
What is the FIRST Step in The Engineering Design Process?
Define the problem.
Identify constraints on your solution.
Brainstorm solutions for the problem.
Communicate your results.
Once you define the problem and identify constraints and needs for success, you must...
Define the Problem.
Determine which solution will be the best.
Brainstorm multiple solutions.
Brainstorm 1 possible solution.
Define a "prototype".
A PROTOTYPE is the problem you have discovered.
A PROTOTYPE is the conclusion you reach at the end of the Engineering Design Process.
A PROTOTYPE is a test to determine if your solution works.
A PROTOTYPE is the first sample created to test your solution.
A group of students are designing a solar cooker. As part of the design process, the students must test a prototype to see if it is able to boil water. What should the students do just before they test it?
Test and evaluate the prototype.
Imagine possible solutions.
Change the prototype and retest it.
Plan and make a prototype.
Identify and research a need.
1. Ask 2, Brainstorm 3. Plan 4. Create 5. Improve - These are all steps of what?
The Engineering Design Process
Artificial Intelligence
Newton's 1st Law of Motion
Identified limitations to the design of a product or system are the
1. Efficiency
2. Criteria
3. Constraints
4. Trade-offs
Time, budget, and safety are almost always considered to be ________________.
Trade-offs
Criteria
Constraints
Efficiency
"The vehicle must travel the farthest distance possible" is an example of...
Criteria
Constraints
Trade off
Research
Problem Statement
"The vehicle needs to go straight" is an example of...
Criteria
Constraints
Trade off
Research
Problem Statement
The vertical axis of a line graph is called the __________.
slope
line of best fit
x-axis
y-axis
What is an independent variable?
the variable that changes because another variable changes
independent variables are only found on pie charts.
a variable most often found on the y-axis
the variable the experimenter changes or manipulates.
What is a dependent variable?
the variable the experimenter changes or manipulates.
the variable that changes because another variable changes
dependent variables are only found on pie charts
a variable most often found on the x-axis
Which type of graph best represents data that shows a change over a period of time?
line
bar
table
circle
What is a variable?
something used to compare the parts of a whole
Something that is useful for displaying data or information that changes over time
Any display of information with tabs, rows and/or columns
Anything in an experiment that can change and can affect the outcome of the experiment
What is the independent variable on the graph?
What is the dependent variable on the graph?
The dependent variable is not shown on this graph
What should you wear in science lab to be safe and protected from dangerous chemicals?
Goggles
Lab apron
Closed toe shoes
ALL OF THESE
Identify the graduated cylinder:
Identify the beaker:
The lab instructions tell students to heat each element separately. Zak decides to heat elements A and B together to see what happens. Has Zak followed the correct procedure?
Yes
No
Always pull back ____________ and roll up your sleeves when doing an experiment.
hair
gloves
apron
lab coat
Electron
A negatively charged subatomic particle located around the nucleus of an atom.
Electron Shell
Areas around the nucleus filled with electrons.
Valence Electron
The electrons filling the outermost shell; react with other atoms.
Compound
A substance formed from two or more atoms chemically united in fixed proportions.
Molecule
A group of atoms held together by chemical forces.
In reaction A +B --> C, reactants A + B have a total mass of 9g. What is the mass of product C?
4g
5g
9g
14g
Which statement is true of the following chemical reaction?
The mass of the reactants is less than the mass of the products.
The mass of the reactants is greater than the mass of the products.
The mass of the reactants is equal to the mass of the products.
(Lesson 3) Label the parts of the atom.
