StudyBlaze

Building a Foundation

1. Which of the following are compounds? (Select all that apply) (multiple choice)

B) O2

A) H2O

C) CO2

D) NaCl

2. Define a mixture and provide two examples.

3. Which of the following is an element? (1 choice)

B) Carbon

C) Salt

A) Water

D) Air

4. List two characteristics of elements and two characteristics of compounds.

Characteristic of elements

Characteristic of compounds

Your answers will be evaluated by AI for key concepts, not exact wording. Focus on main ideas.

5. What is the primary difference between a compound and a mixture? (1 choice)

D) Compounds can be separated by physical means, mixtures cannot.

C) Mixtures are pure substances, compounds are not.

B) Compounds have a fixed ratio of elements, mixtures do not.

A) Compounds are made of elements, mixtures are not.

Comprehension and Application

6. Which statement best describes a homogeneous mixture? (1 choice)

A) It has a uniform composition throughout.

D) It can only be separated by chemical means.

B) It consists of visibly different substances.

C) It is a pure substance.

7. Which of the following statements are true about elements? (Select all that apply) (multiple choice)

A) They can be broken down into simpler substances.

B) They are represented by symbols on the periodic table.

C) They consist of only one type of atom.

D) They can form compounds.

8. Explain why water is considered a compound and not a mixture.

9. If you have a mixture of sand and salt, which method would you use to separate them? (1 choice)

A) Filtration

D) Magnetism

C) Evaporation

B) Distillation

10. Which of the following processes can be used to separate mixtures? (Select all that apply) (multiple choice)

A) Filtration

D) Chromatography

B) Electrolysis

C) Distillation

11. Describe a real-world scenario where separating a mixture is necessary and explain the method used.

Analysis, Evaluation, and Creation

12. Analyze the following substances and determine which are mixtures. (Select all that apply) (multiple choice)

A) Air

B) Gold

C) Salad

D) Water

13. Compare and contrast the properties of a compound and a mixture, using examples to support your analysis.

14. Which method would be most effective for purifying water in a survival situation? (1 choice)

D) Freezing

C) Distillation

A) Filtration

B) Boiling

15. Evaluate the following statements and identify which are correct about separating mixtures. (Select all that apply) (multiple choice)

D) Separation methods depend on the properties of the components.

C) Mixtures can be separated into pure substances.

B) Chemical reactions are needed to separate mixtures.

A) Physical methods can separate mixtures.

16. Design an experiment to separate a mixture of oil and water, explaining the steps and principles involved.

17. Which of the following best describes the relationship between elements and compounds? (1 choice)

D) Compounds cannot be broken down into elements.

A) Elements are formed from compounds.

B) Compounds are formed from elements.

C) Elements and compounds are the same.

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