*PAG-ARALAN NG PAULIT -ULIT***

Which is the first step in designing a scientific investigation?

• Aim or problem

• Method or procedure

• Listing of materials

• Results including data

Which step includes summarizing your findings and explaining their significance in the context of your investigation?

• Analyzing the result

• Writing the conclusion

• Identifying the problem.

• Formulating a hypothesis

Which of the following research questions can you answer by doing an experiment?

• Up to what age do turtles live?

• Which types of soil can hold the greatest amount of water?

• What is the average number of children in Filipino families?

• Why is the same side of the moon always seen from the earth?

Grade 7 students conducted an experiment on how plants grow in warmer temperatures. Which of the following is the independent variable?

• type of soil

• growth of plants

• amount of water used

• temperature

A farmer experiments with different fertilizers on his corn crops to see which will hasten the growth of his plants. What is the dependent variable?

• type of soil

• growth of plants

• type of fertilizer

• different corn crops

A scientist who wants to study the effects of fertilizer on plant growth sets up an experiment. Plant A gets no fertilizer, Plant B gets 2 mg of fertilizer each day, and Plant C gets 5 mg of fertilizer. Which of the following steps in the scientific method did the scientist demonstrate?

• experimenting

• communicating results

• analyzing data

• making hypothesis

Which of the following is the correct order of the steps in doing a scientific investigation?

• Ask a question, make a hypothesis, test the hypothesis, draw conclusions, and analyze the results.

• Ask a question, analyze the results, make a hypothesis, test the hypothesis, and draw a conclusion.

• Ask questions, make a hypothesis, test the hypothesis, analyze results, draw conclusions.

• Make a hypothesis, test the hypothesis, analyze the results, ask a question, draw conclusions.

Which of the following substances can be separated into simpler substances by chemical means?

• aluminum

• gold

• saltwater

• water

Silicon is a chemical element with the symbol Si and atomic number 14. How do you classify the element?

• Metal

• Metalloid

• Non-metal

• Semi-metal

Which of the following substances changes red litmus paper to blue?

• lemon juice

• vinegar

• shampoo

• water