Question 1 A) The picture below shows the particles in one section of an unknown pure substance. Which option represents the particles in another section of this pure substance? (1 point) Responses Question 2 A) The model below shows a molecule of a gas that is present in Earth's atmosphere. Which statement best describes the molecule? (1 point) Responses a mixture composed of oxygen and carbon compounds. a mixture composed of oxygen and carbon compounds. an element composed of oxygen and carbon atoms. an element composed of oxygen and carbon atoms. a compound composed of oxygen and carbon atoms. a compound composed of oxygen and carbon atoms. an atom composed of oxygen and carbon elements. an atom composed of oxygen and carbon elements. Question 3 A) Select the diagram that correctly illustrates a mixture of oxygen, O2, and nitrogen, N2, gases. (1 point) Responses Question 4 A)Air is composed of many different gasses, while water is a pure substance. Which choice best compares air and water?(1 point) Responses Air is a compound of two or more components that keep their own identifying properties, while water is composed of elements that combine forming a mixture. Air is a compound of two or more components that keep their own identifying properties, while water is composed of elements that combine forming a mixture. Air is a mixture of two or more components that keep their own identifying properties, while water is composed of compounds that combine forming a mixture. Air is a mixture of two or more components that keep their own identifying properties, while water is composed of compounds that combine forming a mixture. Air is a mixture of two or more components that keep their own identifying properties, while water is composed of elements that combine forming a compound. Air is a mixture of two or more components that keep their own identifying properties, while water is composed of elements that combine forming a compound. Air is a compound of two or more components that keep their own identifying properties, while water is composed of mixtures that combine forming a compound. Air is a compound of two or more components that keep their own identifying properties, while water is composed of mixtures that combine forming a compound. Question 5 A)Jayla did an investigation about the different states of matter. As part of the investigation, she wanted to change a liquid into a solid. What must she do to bring about this change in state?(1 point) Responses place the liquid in a different container place the liquid in a different container stir the liquid as quickly and thoroughly as possible stir the liquid as quickly and thoroughly as possible remove energy from the liquid so that its particles slow down remove energy from the liquid so that its particles slow down increase the energy of the liquid so that its particles move faster increase the energy of the liquid so that its particles move faster Question 6 A) Reggie puts a beaker of ice and water on a hot plate. He observes the ice slowly melt as shown in diagram below. After a few minutes, only liquid water is left in the beaker. Eventually, the water becomes hot enough to boil. The liquid water changes to water vapor, which is a gas. How is the ice different from the water vapor that forms once the water begins to boil? (1 point) Responses The ice particles move faster. The ice particles move faster. The ice has a higher temperature. The ice has a higher temperature. The ice has a lower boiling point. The ice has a lower boiling point. The ice particles have less energy. The ice particles have less energy. Question 7 A)When heat is added to water, it becomes a gas called water vapor. What happens to the water particles after the the heat is applied?(1 point) Responses The particles slow down and move closer. The particles slow down and move closer. The particles slide past one another. The particles slide past one another. The particles bump into each other. The particles bump into each other. The particles move rapidly and spread far apart. The particles move rapidly and spread far apart. Question 8 A)Which statement correctly describes why hot liquids have more energy of motion compared to cold liquids?(1 point) Responses Hot liquids have a higher number of particles. Hot liquids have a higher number of particles. Cold liquids have less electrons. Cold liquids have less electrons. Particles in hot liquids move faster. Particles in hot liquids move faster. Particles in hot liquids move slower. Particles in hot liquids move slower. Question 9 A) Katie found a sample of an unknown solid. She performed a series of experiments to determine some of its properties. Her experiments are described in the chart below. Use the information to answer the following question. Which of the following is correct about Katie's experiments? (1 point) Responses Experiments 2 and 4 were designed to find chemical properties. Experiments 2 and 4 were designed to find chemical properties. Experiments 3 and 4 were designed to find physical properties. Experiments 3 and 4 were designed to find physical properties. Experiments 1 and 2 were designed to find physical properties Experiments 1 and 2 were designed to find physical properties Experiments 1 and 3 were designed to find chemical properties. Experiments 1 and 3 were designed to find chemical properties. Question 10 A)Which investigation could demonstrate a chemical property of iron?(1 point) Responses Performing an investigation to show how iron can conduct electricity and heat. Performing an investigation to show how iron can conduct electricity and heat. Performing an investigation to show how iron can be flattened into sheets. Performing an investigation to show how iron can be flattened into sheets. Performing an investigation to show how iron reacts with oxygen to form rust. Performing an investigation to show how iron reacts with oxygen to form rust. Performing an investigation to show how iron can be drawn into a wire.