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Chemistry
University -
Professional Development
Lesson 1 - True or False
10 questions
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- 1. Multiple Choice
A substance is a type of matter that has a consistent composition.
True
False
- 2. Multiple Choice
Elements are substances that are made up of two or more elements chemically combined.
True
False
- 3. Multiple Choice
Whereas a compound is made from the chemical combination of two or more substances, a mixture is made from two or more substances that are physically combined.
True
False
- 4. Multiple Choice
Heterogeneous mixtures are mixtures that have a uniform composition throughout the entire sample.
True
False
- 5. Multiple Choice
Unlike in the example of compounds, the substances that make up a mixture do not lose their individual properties.
True
False
- 6. Multiple Choice
The substances in a mixture can be separated by physical means.
True
False
- 7. Multiple Choice
When a compound is formed, altogether a new substance is formed and the properties of which are similar to its constituent elements.
True
False
- 8. Multiple Choice
All mixtures have variable composition. It means that the substances that are found in the mixture can be mixed with various proportions or concentrations.
True
False
- 9. Multiple Choice
Chemical reactions can break more complex substances down into elements, but elements can only be broken down further by nuclear reactions.
True
False
- 10. Multiple Choice
Oxygen is a substance because it has a consistent composition and it is an element because it is only made up of one type of atom.
True
False
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