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What Is The Set Of Procedures That Can Be Used To Explain And Predict Events Or Phenomena?

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What Is The Set Of Procedures That Can Be Used To Explain And Predict Events Or Phenomena?
FIRST PERIODICAL EXAM
GRADE 7
NAME: SCORE:
YEAR AND SECTION: DATE:

I. MULTIPLE CHOICE. Circle the letter of the correct answer.

1. What is the set of procedures that can be used to explain and predict events or phenomena?
A. Scientific discovery
B. Scientific method
C. Scientific notation
D. Scientific thinking

2. Which of the following pairs of elements make up the salt compound?
A. chlorine and oxygen
B. oxygen and hydrogen
C. sodium and chlorine
D. sodium and hydrogen

3. What is meant by pH?
A. power of hafnium
B. power of hassium
C. power of helium
D. power of hydrogen

4. Which of the following is not a step in scientific method?
A. Disorganize data gathered
B. Do further experiments
C. Identify the problem
D. Make a guess or hypothesis

5. What is the …show more content…
Cris is making a pineapple juice with the amount of pineapple powder proportional to the amount of water.
C. Lino is making a salt solution with lesser amount of salt than water.
D. Ricky is making a milk drink by putting more milk powder than water.

15. Which of the following acts will increase solubility?
A. Student B heated the beaker containing salt solution.
B. Student C put the beaker containing salt solution in a freezer.
C. Student D cooled the beaker containing salt solution.
D. Student E just left the beaker containing salt solution without doing anything to it.

16. Which of the following pairs of substances are not soluble to each other?
A. ethanol and water
B. salt and water
C. water and oil
D. water and soap powder

17. Antacids taken by people who have hyperacidity contains bases and it reacts with the excess acids in the stomach. What reaction does it exhibit?
A. combustion reaction
B. decomposition reaction
C. displacement reaction
D. neutralization reaction

(A) (B)

18. Which of the two images above shows an acid?
A. Image A
B. Image B
C. Both images
D. None of those

19. Which of the two images above shows a base?
A. Image
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