1. What is the logical and organized steps in solving a problem?

• A. Experimental method

• B. Investigation method

• C. Research method

• D. Scientific method

2. 2. A grade 7 student wants to know if tomato seeds grow faster than mongo seeds. His teacher reminds him to follow the steps in scientific methods in planning his work. How will he perform the correct order of steps in scientific method?

I.  Gathering preliminary data

II. Formulating a hypothesis

III. Identifying the problem

IV. Conducting an experiment

V. Verifying the conclusion

VI. Drawing a conclusion

VII. Collecting and interpreting the data

 

• A. I, II, III, IV, V, VI, VII

• B. IV, I, II, V, VI, III, VII

• C. III, I, II, IV, VII, VI, V

• D. II, V, VII, III, I, IV, VI

3. What type of substance is water?

                                     

                                 

• A. It is a solution

• B. It is a mixture

•     C. It is an element.

•        D. It is a compound.

4. The teacher gave a sample of a material to her student. The student was asked to determine whether it is an element, compound, or mixture. The student found out that she cannot separate the components of the sample through physical means. However, she can separate the sample by chemical means into three different pure substances. How would you classify the given sample material?

• A. a compound

• B. an element

• C. a mixture

• D. a solution

5. Water is vital for all known forms of life, even though it provides no calories or organic nutrients. Which of the following describes water?

                                      

                                      

• A. It is a solution.  

• B. It is a mixture.  

• C. It is an element.

• D. It is a compound.

6. Why does carbon is considered an element while carbon dioxide is considered a compound?

• A. Carbon dioxide is a gas at room temperature.

• B. Carbon dioxide is made of two different elements.

• C. Carbon dioxide is given off by humans and animals.

• D. Carbon dioxide is taken in by plants.

7. When Iron (Fe) nails are exposed to the environment, they get rusty. What is Iron (Fe)?

• A. It is a solution.

• B. It is a mixture.

• C. It is an element.

• D. It is a compound.

8. Which of the following explains why saltwater is considered a mixture?

• A. It is composed of one element.

• B. It is composed of one compound.

• C. It is composed of two or more substances and has new chemical properties.

• D. It is composed of two or more substances and retains its own chemical properties.

9. Which of the following BEST describes an unknown solid substance?

• A. The solid material melts completely/smoothly.

• B. The solid material takes a long time to completely melt.

• C. The solid material has a constant boiling temperature.

• D. The solid material boils at a temperature range.

10. 10. Your classmate John is absent due to cough and colds, if you are to recommend, what kind of solution is suited for him?

• A. Calamansi juice

• B. Coffee

• C. Iced tea

• D. Powder juice