ATOMS and MODELS
According to the Particle Model of Matter, what is matter made up for?
A. Energy
B. Tiny Particle
C. A nucleus at the center
D. Nothing, just empty space
B. Tiny Particle
Which of the following is not a state of matter?
A. Solid
B. Liquid
C. Gas
D. Energy
D. Energy
Which of this best describes the order of the scientific investigation steps?
A.Observation → Question → Hypothesis → Experiment → Conclusion
B. Hypothesis → Experiment → Conclusion → Observation → Question
C. Question → Experiment → Observation → Conclusion → Hypothesis
D. Experiment → Hypothesis → Observation → Conclusion → Question
A. Observation → Question → Hypothesis → Experiment → Conclusion
A student dissolves powdered juice in water to make a drink. Which is the solute?
A. The drink C. Powdered juice
B. Water
C. Powdered juice
D. Both powdered juice and water
C. Powdered juice
Which of the following will NOT affect the solubility of a solid in a liquid?
A. Temperature B. Pressure C. Stirring D. Particle size
B. Pressure
Which of the following is NOT a type of model that may be used to describe what makes up matter?
A. Physical model C. Conceptual model
B. Mathematical model D. Emotional model
D. Emotional model
Which state of matter has the fastest moving particles at the same temperature?
A. Solid
B. Liquid
C. Gas
D. Plasma
C. Gas
Which of the following is NOT one of the key steps in a scientific investigation?
A. Aim or problem
B. Materials and equipment
C. Hypothesis
D. Conclusions
B. Materials and equipment
In soda, carbon dioxide gas is dissolved in liquid water. Which is the solvent?
A. Carbon dioxide B. Water C. The bubbles D. Sugar
B. Water
Which of the following household items is a base and will turn red litmus paper blue?
A. Vinegar B. Lemon juice C. Baking soda solution D. Milk
C. Baking soda solution
Who proposed the idea that atoms are indivisible and solid like a billiard ball?
A. J.J. Thomson
B. John Dalton
C. Ernest Rutherford
D. Niels Bohr
B. John Dalton
What best describes the particle arrangement in a gas?
A. Close together and vibrating
B. Slightly apart and sliding
C. Far apart and moving freely in all directions
D. Fixed in a regular pattern
C. Far apart and moving freely in all directions
In which step would you create a detailed record of the experiment's setup and conditions?
B. Record and Analyze the Results
A scuba diver uses an oxygen tank filled with a mixture of gases. In this mixture, nitrogen makes up the largest percentage. Which role does nitrogen play?
A. Solute, because it is less important than oxygen.
B. Solvent, because it is the major component.
C. Solvent, because gases cannot be solutes.
D. Solute, because oxygen is lighter.
B. Solvent, because it is the major component.
Which of the following is a common household acid that would turn blue litmus paper red?
A. Vinegar B. Baking soda solution C. Soap D. Saltwater
A. Vinegar
Which model of the atom describes electrons orbiting the nucleus in fixed paths?
A. Dalton's Model
B. Thomson's Plum Pudding Model
C. Rutherford's Model
D. Bohr's Model
D. Bohr's Model
Which statement is true about the relationship between temperature and particle speed?
A. The lower the temperature, the faster the particles move
B. Temperature has no effect
C. Higher temperature increases particle speed
D. Only solids are affected by temperature
C. Higher temperature increases particle speed
What is the best way to ensure that measurements of volume are accurate and consistent?
A. Measure quickly to avoid evaporation
B. Use the meniscus to read the level of the liquid
C. Fill the liquid to the top of the graduated cylinder
D. Use a thermometer to check the liquid’s temperature
Use the meniscus to read the level of the liquid
Which of the following best explains why stirring increases the rate of solubility?
A. Stirring adds heat to the solution.
B. Stirring increases contact between solute and solvent particles.
C. Stirring reduces the number of solute particles.
D. Stirring changes the solvent into a gas.
B. Stirring increases contact between solute and solvent particles.
How should you properly handle a glass beaker that has been heated?
A. Cool it quickly by placing it under cold water.
B. Use heat-resistant gloves or tongs to handle it.
C. Pick it up directly with your hands to avoid spills.
D. Place it on a cold surface to cool down immediately.
B. Use heat-resistant gloves or tongs to handle it.
Which of the following best describes a scientific model?
A. A real object used in experiments
B. A set of laws used in math
C. A representation of an idea, object, or process to explain or predict behavior
D. A guess without evidence
C. A representation of an idea, object, or process to explain or predict behavior
If you place perfume in one corner of a room, why does its scent spread quickly in warm air?
A. Warm air blocks scent
B. Perfume evaporates slowly
C. Warm particles move faster, helping scent particles spread
D. Cold air absorbs the smell
C. Warm particles move faster, helping scent particles spread
“To investigate the effect of temperature on the rate of photosynthesis in green algae.” is your main problem in your research. Which tool is used to measure the of an object?
A. Ruler B. Graduated Cylinder C. Scale D. Thermometer
D. Thermometer
. If 10mL of acetic acid is diluted with 200 mL water, what is the percent by volume of acetic acid in the solution?
A. 4.00% B. 4. 50% C. 4. 75% D. 5.00%
C. 4. 75%
What is the proper way to dispose of chemical waste in a school laboratory?
A. Throw it in the regular trash bin.
B. Pour it down the sink with running water.
C. Mix it with other chemicals to neutralize it before disposal.
D. Follow the specific disposal instructions provided by the teacher or lab manual.
D. Follow the specific disposal instructions provided by the teacher or lab manual.