Podcast
Questions and Answers
What kind of change is taking place as the wood is chopped?
What kind of change is taking place as the wood is chopped?
- A change in matter
- A change in physical property (correct)
- A change in chemical property
- A change in substance
Who is correct regarding the definition of matter?
Who is correct regarding the definition of matter?
- Ricky
- Evan
- Leon (correct)
- Michelle
What type of separation method does an air purifier use?
What type of separation method does an air purifier use?
- Filtration (correct)
- Evaporation
- Magnetic attraction
- Distillation
Which comparison point would Min not use in the first stage?
Which comparison point would Min not use in the first stage?
What is the chemical formula of sulfuric acid?
What is the chemical formula of sulfuric acid?
Burning wood is an example of a change in (blank) property.
Burning wood is an example of a change in (blank) property.
A group of two or more atoms held together by chemical bonds is a (blank).
A group of two or more atoms held together by chemical bonds is a (blank).
What are two ways in which mixtures differ from compounds?
What are two ways in which mixtures differ from compounds?
Match the following substances with their classification:
Match the following substances with their classification:
Which measurement did the Apollo 17 astronauts not use for moon rocks?
Which measurement did the Apollo 17 astronauts not use for moon rocks?
Which object has a mass of 27 grams with an identical volume of 3 cm³?
Which object has a mass of 27 grams with an identical volume of 3 cm³?
Flashcards
Physical Change
Physical Change
A change that affects the form or appearance of a substance, but not its chemical composition.
Compound
Compound
A substance composed of two or more elements chemically bonded in fixed proportions.
Chemical Change
Chemical Change
A change that involves the rearrangement of atoms to form new substances.
Molecule
Molecule
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Mixtures vs. Compounds
Mixtures vs. Compounds
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Filtration
Filtration
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Sulfuric Acid Formula
Sulfuric Acid Formula
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Mass vs. Weight
Mass vs. Weight
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Density
Density
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Study Notes
Describing and Classifying Matter
- Physical Change: A change in the form or appearance of a substance, but not its chemical composition. For example, chopping wood changes its shape but not its chemical makeup.
- Chemical Change: A change that results in the formation of new substances with different properties.
- Matter: Anything that has mass and occupies space.
- Air Purifier: Uses filtration to separate dust and allergens from the air.
- Physical Property: A characteristic of a substance that can be observed without changing its chemical composition. For example, color, conductivity, and boiling point are physical properties.
- Chemical Property: A characteristic of a substance that describes how it reacts with other substances. For example, flammability is a chemical property.
- Compound: A substance formed by the chemical combination of two or more elements in a fixed ratio. For example, sulfuric acid (Hâ‚‚SOâ‚„) is a compound.
- Mixture: A combination of two or more substances that are not chemically bonded. For example, air, smog, coffee, and chocolate milk are mixtures.
Measuring Matter
- Mass: The amount of matter in an object. It is independent of gravity.
- Volume: The amount of space that an object occupies.
- Density: The ratio of an object's mass to its volume.
- Weight: The force of gravity on an object. It is dependent on gravity.
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