What is the purpose of making observations in the scientific method?
1. To gather data and information
To prove a hypothesis
To develop a conclusion
To form bias
2. Which of the following statements best describes the purpose of forming a hypothesis in the scientific method? (1 point)
To prove a theory correct
To make predictions about the outcome of an experiment
To collect data and analyze results
To communicate findings to others
3. Which of the following is a limitation of scientific models?
They are too simple to represent complex phenomena
They are always 100% accurate in their predictions
They cannot be modified or improved upon
They are only used in theoretical research
4. How are scientific theories different from scientific laws? (1 poir
Theories are based on facts, while laws are based on opinions.
Theories are explanations, while laws are mathematical equations.
Theories are always proven, while laws are still being tested.
Theories can be modified, while laws are fixed and unchangeable.
5. How does mass differ from weight? (1 point)
Mass is a measure of the force of gravity on an object, while weight is the amount of matter in an object.
Mass and weight are the same thing.
Mass is a measure of the matter in an object, while weight is the force of gravity acting on an object
Mass and weight are completely unrelated concepts.
6. A block of wood floats in water. Which of the following statements is correct? (1 point)
The wood has a higher density than water
The wood has a lower density than water
The wood and water have the same density
The density of the wood cannot be determined
7. Which of the following is an example of a mixture? (1 point)
Water
Salt
Oxygen Gas
Air
8. Particles in each state of matter behave differently because they have different amounts of thermal energy. For each statement below, select whether it is true or false. (1 point)
Particles in a solid are packed tightly. True or False
Particles in a solid have thermal energy. True or False
Particles in a solid are completely still. True or False
9. Determine whether each statement below is true or false to complete the table. (1 point)
The nucleus of an atom is found in the atom's center. True or False
The nucleus of an atom contains at least one proton. True or False
A neutron has a positive electrical charge. True or False
Most of an atoms mass is found in protons and neutrons. True or False
10. Which of the following statements best describes the periodic table? (1 point)
A chart that organizes elements based on their atomic number.
A chart that lists elements in alphabetical order.
A chart that groups elements based on their melting points
A chart that shows the number of electrons in each element.
1. To gather data and information
2. To make predictions about the outcome of an experiment
3. They are too simple to represent complex phenomena
4. Theories are explanations, while laws are mathematical equations.
5. Mass is a measure of the matter in an object, while weight is the force of gravity acting on an object.
6. The wood has a lower density than water
7. Air
8. Particles in a solid are packed tightly: True, Particles in a solid have thermal energy: True, Particles in a solid are completely still: False
9. The nucleus of an atom is found in the atom's center: True, The nucleus of an atom contains at least one proton: True, A neutron has a positive electrical charge: False, Most of an atom's mass is found in protons and neutrons: True
10. A chart that organizes elements based on their atomic number.
Double check bot
11. Which of the following is a physical property of matter? (1 point)
Ability to rust
Ability to burn
Ability to conduct electricity
Ability to react with water
12. The chemical reaction that produces soap is called saponification. During one type of saponification, oil and sodium hydroxide undergo a chemical change to produce glycerol and soap. As a result of this reaction, the soap has different properties than the oil and sodium hydroxide. Some of these properties are what give soap its cleaning ability. For each statement below, choose whether it is true
or false.
A chemical change occurs during saponification. True or False
Soap is a reactant of the saponification reaction. True or False
Together, the products of a chemical reaction have the same arrangement of atoms as the reactants. True or False
13. What happens to the pH of a solution when it becomes more acidic?
• The pH increases.
• The pH decreases.
• The pH remains the same.
• The pH becomes neutral.
14. What is the significance of atoms in the formation of compounds?
• Atoms are the smallest particles of matter.
• Atoms determine the color of compounds.
• Atoms provide energy to compounds.
• Atoms combine to form compounds.
15. Below are two atomic models. Each model represents a different atom. Complete the sentence: The two atoms represented above contain the same number of (blank)
• Protons
• Neutrons
• Electrons
16. What do these two changes have in common?
• rust forming on a metal gate
• snails growing shells
(1 point)
• Both conserve mass
• Both are chemical changes
• Both are only physical changes
• Both are changes in state
17. Which of the following best describes the gravitational force on the Moon compared to Earth?
(1 point)
• The Moon has stronger gravity than Earth.
• The Moon has weaker gravity than Earth.
• The Moon has the same gravity as Earth.
• The gravity on the Moon depends on its distance from the Sun.
18. What process transfers energy from the Sun's core to its surface? (
• Convection
• Radiation
• Conduction
• Diffusion
11. Ability to conduct electricity
12. A chemical change occurs during saponification: True, Soap is a reactant of the saponification reaction: False, Together, the products of a chemical reaction have the same arrangement of atoms as the reactants: False
13. The pH decreases.
14. Atoms combine to form compounds.
15. Electrons
16. Both are chemical changes
17. The Moon has weaker gravity than Earth.
18. Radiation
21. The model below shows the Moon at one position in its orbit around Earth The white half of the Moon represents the part of the Moon that is lit up by the Sun. Select the phase of the Moon shown in the model.
Full moon
Third Quarter moon
New Moon
1st quarter moon
22. Which two factors determine the strength of gravitational force between two objects?
Mass and Color
Distance and Shape
Mass and Distance
Color and Shape
23. Put the following astronomical bodies into the correct hierarchical order from smallest to largest.
Star
=Galaxy
Meteor
Solar System
Planet
Universe
24. How does physical evidence, such as rock layers, contribute to our understanding of Earth's history? (1 point)
It helps predict future climate patterns.
It provides information about ancient human settlements.
It reveals the sequence of events that occurred over time.
It demonstrates the impact of human activities on the environment.
25. Which of the following is a key characteristic of all planets? (1 point)
They are made up of mostly ice and dust
They orbit the sun and shine by reflecting light
They are small rocky objects the burn upon entering Earth's atmosphere
They have a tail that extends as it moves through space
26. Which of the following best describes the role of gravity in the formation of planets, stars, and solar systems? (1 point)
Gravity causes the expansion of the universe.
O Gravity prevents the formation of stars and planets.
Gravity brings together matter, leading to the formation of stars, planets, and solar systems.
Gravity is not involved in the formation of stars and planets.
27. Which of the following best explains why the Southern Hemisphere experiences seasons opposite to those in the Northern Hemisphere? (1 point)
The tilt of Earth's axis is reversed in the Southern Hemisphere.
The Southern Hemisphere is closer to the sun during its winter.
The Southern Hemisphere receives less direct sunlight during its summer.
The Southern Hemisphere has a longer revolution around the sun.
28. For each of the statements below, indicate whether the statement describes a scientific theory, a scientific law, or both. (1 point)
Both or Scientific Law or Scientific Theory
Can be modified if new evidence or information arises. Both or Scientific Law or Scientific Theory
Often represented by a mathematical formula. Both or Scientific Law or Scientific Theory
Explains how a natural phenomenon works. Both or Scientific Law or Scientific Theory
Describes a relationship that always occurs under specific conditions. Both or Scientific Law or Scientific Theory
29. Even though particles in a solid cannot move past one another, they are not completely still From the options below, select all of the TRUE statements. (1 point)
Particles in a solid have thermal energy
Particles in a solid are completely still
Particles in a solid are packed tightly
30. The diagram shows a representation of the particles in a liquid. Which of the following can happen when a liquid is heated? For each of the statements below, select whether it is true or false.
When a liquid is heated
(1 point)
the particles gain thermal energy. True or False
the mass of each particle increases. True or False
the substance vaporizes and becomes a gas True or False
21. Third Quarter moon
22. Mass and Distance
23. Meteor, Planet, Solar System, Star, Galaxy, Universe
24. It reveals the sequence of events that occurred over time.
25. They orbit the sun and shine by reflecting light
26. Gravity brings together matter, leading to the formation of stars, planets, and solar systems.
27. The tilt of Earth's axis is reversed in the Southern Hemisphere.
28. Can be modified if new evidence or information arises: Scientific Theory, Often represented by a mathematical formula: Scientific Law, Explains how a natural phenomenon works: Scientific Theory, Describes a relationship that always occurs under specific conditions: Scientific Law
29. Particles in a solid have thermal energy, Particles in a solid are packed tightly
30. the particles gain thermal energy: True, the mass of each particle increases: False, the substance vaporizes and becomes a gas: True