Questions and Answers
What energy is stored in a dry cell?
What is always produced when energy transformation occurs?
Which device uses chemical energy in portable radios to produce sound?
Which simple machine is made of a rigid or strong bar that is free to move at a fixed point?
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Why do great earthquakes occur? They occur __________.
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Which of the following factors best refer to the magnitude of an earthquake?
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Why does a tsunami occur?
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Which should you observe before an earthquake?
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Which should you avoid after an earthquake?
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Which of the following volcanoes found in the Philippines erupted violently and sent its smoke and ashes up to the stratosphere?
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Before a volcano erupts, there are signs that enable volcanologists to predict an impending volcanic eruption months or weeks before it will be. Below are three of these signs, EXCEPT:
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Of the different kinds of volcanoes, which may erupt without warning any time?
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Why do sailors avoid the doldrums?
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What kind of climate do areas surrounded by seas have?
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What kind of season has most leaves falling from the trees?
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Which are the hottest stars?
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The color of our sun is __________.
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What is the correct order of steps in the scientific method?
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Which of the following questions is best considered scientific?
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What is the process of obtaining information using your senses?
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What variable can be changed or manipulated?
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A scientist hypothesizes that the temperature at which an ostrich egg is incubated will determine whether the ostrich will be male or female. What is the independent variable in this experiment?
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Please refer to the situation in number 22, what is the dependent variable?
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What do you call an idea or explanation that you test through study and experimentation?
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Study Notes
Energy and Machines
- A dry cell stores chemical energy.
- Heat is always produced during energy transformation.
- A dry cell is used in portable radios to convert chemical energy into sound.
- A lever is a simple machine that consists of a rigid bar free to move at a fixed point.
Earthquakes and Tsunamis
- Great earthquakes occur due to shifting crustal plates.
- The magnitude of an earthquake refers to the total amount of energy released.
- A tsunami is caused by earthquakes under the sea.
Safety and Precautions
- Before an earthquake, it's important to perform an earthquake drill regularly.
- After an earthquake, avoid elevators as they may become unsafe.
Volcanic Activity
- Mount Pinatubo in Zambales is known for its violent eruptions that reached the stratosphere.
- Signs of impending volcanic eruptions include escaping gases and changes in water level.
- An active volcano may erupt without warning, necessitating vigilance from nearby residents.
Climate and Weather
- Areas surrounded by seas typically experience a mild climate.
- Autumn is the season when most leaves fall from trees.
Astronomy
- The hottest stars are classified as bluish-white stars.
- The sun appears white in color.
Scientific Method and Hypothesis
- The correct order of the scientific method: ask a question, make a hypothesis, test the hypothesis, analyze results, draw conclusions.
- A scientific question best assessed is: Does the amount of salt in water affect the boiling temperature?
- Observation is the process of obtaining information using the senses.
- An independent variable is the one that can be changed or manipulated in an experiment.
Experiment Variables
- In an experiment concerning ostrich egg temperature, the independent variable is temperature.
- The dependent variable in the same experiment is the gender of the ostrich.
- A hypothesis is an idea or explanation tested through study and experimentation.
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Description
Test your knowledge with this G7 Science Diagnostic test covering energy forms and transformations. Answer questions about chemical energy, sound production, and simple machines. Perfect for students preparing for evaluations in science concepts!
