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Module 2: Changes in

Module 02: Changes in Matter

QuestionAnswer
Which state of matter shows particles sliding past each other but still maintaining the same volume? liquid
Which state of matter shows particles moving all around a filling the space that they are in? gas
Which state of matter shows particles very close together, vibrating, and not changing their position? solid
Kaysen wrote the following phrase to describe the movement of particles in a state of matter. "Spheres jiggle together in a locked position." Which state of matter did Kaysen most likely describe? solid
Belinda wrote the following phrase to describe the movement of particles in a state of matter. "Marbles glide past one another." Which state of matter did Belinda most likely describe? liquid
Cindy wrote the following phrase to describe the movement of particles in a state of matter. "Tennis balls are neutral particles, far away from each other and moving at fast speeds." Which state of matter did Cindy most likely describe? gas
Chemical or physical change? Burning wood chemical
Chemical or physical change? Souring of milk chemical
Chemical or physical change? Charring of a marshmallow chemical
Chemical or physical change? Fireworks exploding chemical
Chemical or physical change? Different atoms than before are introduced after the change chemical
Chemical or physical change? A completely new substance is formed chemical
Chemical or physical change? Substance changes its form but not its molecular composition physical
Chemical or physical change? The changed substance retains its unique properties physical
Chemical or physical change? The changed substance retains its unique properties. physical
A plant uses carbon dioxide and water to form food and oxygen. Why is this a chemical change? The properties of carbon dioxide and oxygen are different.
Over a period of time a student observed a small tadpole changing into a frog. Which of the following explains the physical change that takes place in this growing frog? The tadpole changes its shape and form.
Justine observed that the water level in a dish placed on the window sill decreased after a few days, and vapor formed. What best explains that she observed a physical change? Vapor can be easily condensed back to form water.
A 100 kg log of wood was neatly cut into two smaller pieces. What is the total mass of all the smaller pieces put together? 100 kg
A cube of ice melts in a beaker to form 10 g of water. What is the best estimate of the mass of the ice cube? 10 g
In a chemical interaction 10 g of hydrogen chloride is added to 20 g of zinc to form 24 g of zinc chloride and a certain amount of hydrogen gas. What mass of hydrogen gas is expected to be formed? 6 g
Rust is formed by the interaction of iron and oxygen. When rust formed on an iron nail with a mass of 100 g, the mass of the rusted nail was 143 g. What mass of oxygen gas most likely reacted with the iron nail? 43 g
Which of the following most likely happens when the temperature of a chemical reaction is increased? molecules speed up
Which of the following most likely causes the rate of a chemical reaction to increase? adding heat to the reaction
Which of the following most likely happens when thermal energy is removed from a chemical reaction? fewer collisions occur between particles
Which of the following most likely causes the particles in a chemical reaction to slow down? lowering the temperature
Object A has a mass of 10 g and a volume of 8 cm3. Object B has a mass of 10 g and a volume of 6 cm3. Which object has a greater density and by how much? Object B, by 0.42 gram per cubic centimeter
When baking soda and vinegar react, the surface bubbles. What does this MOST LIKELY indicate? a chemical change, because a gas is being formed
Created by: kbordelon1
 

 



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