1. Which is the first step in scientific method?
a. Hypothesis Making
b. Identify the Problem
c. Drawing Conclusion
d. Analyzing Data
2. Which is the last step in scientific method?
a. Testing the Hypothesis
b. Gathering Data
c. Application of Conclusion
d. Identify Problem
For 3 -5, refer to the situation below
[ Albien wonders on the effect of eggshell on the growth of the plants. He decided to design an experiment. He pulverized the eggshell and mixed the same amount of it to the same amount of soil in two plants. ]
3. What does Albien what to investigate in his experiment?
a. The effect of eggshell in the growth of plants
b. The effect of soil in plant growth
c. The effect of water in the plant growth
d. All of the above
4. What variable has a direct effect on the experimental group of plants?
a. Water
b. Soil
c. Pot
d. Eggshell
5. What variables were remained constant or in the same amount in all plant set-ups?
a. Eggshell
b. Soil
c. Water
d. B and C
For 6, refer to the situation below.
[Vryle, a grade – seven student, decided to design an experiment to investigate the factors that affect the solubility of salt in water. He prepared 5 test tubes to test with the different factors that may affect the solubility of the salt.]
6. What effect does stirring the solution do on the speed of dissolving the crystals?
a. Stirring can help dissolve the salt in water faster.
b. Stirring can help dissolve the salt in water slower
c. All of the above
d. None of the above
7. Which statement shows the “conclusion” of an experiment?
a. I want to know if a bean plant will grow more quickly inside or outside.
b. It took 15 minutes to dissolve the water crystal in tap water.
c. Look at the time it too for each container of water to freeze.
d. Based on the results of your experiment, it come out as to whether water with sugar freezes faster, slower, or at the same rate as water without sugar is added.
For 8, refer to the situation below.
[ Harmony, a Grade 7 student from Gabriela Silang High School, conducted an experiment. She made an electromagnet with 10 coils that picked up 3 paper clips. She asked herself what will happen if she would use a thicker wire, and thought that using a thicker wire would make the electromagnet stronger. ]
8. What was the conclusion of her experiment?
a. The greater the coil of wires in prepare electromagnet, the stronger its attraction.
b. The lesser the coil of wires in prepare electromagnet, the stronger its attraction.
c. The lesser the coil of wires in prepare electromagnet, the weaker its attraction.
d. The greater the coil of wires in prepare electromagnet, the weaker its attraction.
9. Which element in the periodic table has the symbol of “Hf”?
a. Hydrogen
b. Hafnium
c. Helium
d. Hassium
10. Which element in the periodic table has the symbol of “Si”?
a. Sodium
b. Silicon
c. Silver
d. Stronium
11. Which is the symbol of the element Tungsten in periodic table?
a. Tu
b. T
c. Wu
d. W
12. Which is the symbol of the element Iron in the periodic table?
a. I
b. Fe
c. Ir
d. Fer
13. Which constitutes the smallest chemical substances in which all the atoms are exactly the same.
a. Compound
b. Atom
c. Element
d. Molecule
14. Which compound has the chemical formula of NaCl?
a. Ethyl alcohol
b. Methane
c. Baking soda
d. Table salt
15. Which compound has the chemical formula of H2O2?
a. Sodium fluoride
b. Acetic Acid
c. Hydrogen Peroxide
d. Betsin
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Answer:
1.a
2.b
Explanation:
sorry Yan lng maisagot ko sana Maka tulong