WorksheetsM2_Semester Review_Fall 2025_M2_(TEKS 7.6, 7.7, 7.8)
Total questions: 19
Worksheet time: 10mins
Use the periodic table to identify which statement best describes carbon dioxide, CO2.
It is an element that consists of 3 total atoms.
It is a molecule that consists of 3 total atoms.
Think about the similarities and differences between elements and compounds. Which of the following is true?
Elements are made of one kind of atom, and compounds are made of more than one kind of atom.
Elements are made of molecules, and compounds are made of atoms.
Glucose has the chemical formula C6H12O6. Which of the following is true about one molecule of glucose?
It consists of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
It consists of 6 carbon atoms, 6 hydrogen atoms, and 12 oxygen atoms.
Elements and compounds are similar in some ways and different in others. Circle TWO correct answers.
The chemical formula for chlorine gas is C.
An element’s symbol must start with a capital letter.
Elements are represented by a single chemical symbol.
A compound, such as water, can have different chemical formulas.
Using the periodic table, which elements are present in the formula CaCO3?
calcium, carbon, and oxygen
calcium and cobalt
Ellen learned that honey is a saturated solution of glucose and fructose dissolved in water. Which describe solute(s) and solvent(s) in the honey solution?
Water is the solvent and glucose is the only solute.
Water is the solvent and glucose and fructose are the solutes.
Which phrase describes a chemical change?
boiling a pot of water
fruit rotting and giving off a smell
Physical and chemical changes can be identified based on various observations of changes in objects. For a piece of paper, which type of change is described by the observation: soaked with water?
Physical change
Chemical change
Physical and chemical changes can be identified based on various observations of changes in objects. For a piece of paper, which type of change is described by the observation: set on fire and burned?
Physical change
Chemical change
Physical and chemical changes can be identified based on various observations of changes in objects. For a piece of paper, which type of change is described by the observation: painted from white to red?
Physical change
Chemical change
Physical and chemical changes can be identified based on various observations of changes in objects. For a piece of paper, which type of change is described by the observation: interacts with acid and turns yellow?
Physical change
Chemical change
Jensen investigated a toy’s car’s motion by graphing the distance it traveled over time. He then calculated the car’s average speed. What is the average speed of the toy car?
0.2 m/s
0.2 s/m
5 m/s
It takes one hour for an airplane to travel north for 750 kilometers (km). What is the airplane’s average velocity?
750 km/hr
750 km/hr north
Students measure the speed of two cars on the same road. Car A travels north at 40 km/h and Car B travels south at 40 km/h. Which statement correctly compares the speed and velocity of the two cars?
The velocities are different because the cars are moving in different directions but at the same speed.
The velocities are different because the cars are moving in different directions and at different speeds.
A school bus travels 2 kilometers in 4 minutes and then stops to pick up more students. It travels another 3 kilometers in 2 minutes. The bus stops again and then travels 3 more kilometers to school. Which distance-time graph BEST records the motion they took to school on the bus?
A
B
C
Which statement correctly describes convection?
Thermal energy is transferred through movement of particles within a substance.
Thermal energy is transferred through electromagnetic waves without involving particles.
Hot soup is poured into a room-temperature bowl to model thermal energy transfer. Energy moves within the soup-bowl system. Which statement explains the flow of thermal energy in the system?
Thermal energy flows from the higher-temperature soup to the bowl until the soup and bowl are the same temperature.
Thermal energy flows from the lower-temperature bowl to the soup until the soup and bowl are the same temperature.
Jack drew four models of the molecules of the same substance in different forms. Which model shows the substance at the lowest temperature?
Model A
Model B
Model C
Model D
In which direction is thermal energy transferred between two substances with different initial temperatures?
from the cold substance to the hot substance
from the warm substance to the cold substance
