Unit 1 Introduction to Physical Science Quiz

Jack tries to place magnets on the door of his refrigerator. He observes that the magnets don’t stick. He guesses that the door of the refrigerator is made of a nonmagnetic substance. What stage of scientific investigation does his guess represent?

• ask questions

• construct a hypothesis

• explain the results

• make observations

Answer explanation

Jack's guess that the refrigerator door is made of a nonmagnetic substance is a hypothesis. It is a proposed explanation based on his observation that the magnets don’t stick, representing the stage of constructing a hypothesis.

Meg goes swimming on a hot afternoon. When she comes out of the pool, her foot senses that the pavement is unbearably hot. Suppose Meg wants to apply the scientific method to discover reasons for the hot pavement. What is the next step she should take?

• analyze the data

• ask questions

• communicate the results

• make observations

Answer explanation

The next step Meg should take is to ask questions. This is essential in the scientific method to identify the factors contributing to the hot pavement, such as the material, sunlight exposure, or time of day.

Select the correct answer. When a candle burns, which forms of energy does the chemical energy in the candle change to?

• light and sound

• heat and sound

• light and heat

• electric and light

Answer explanation

When a candle burns, the chemical energy stored in the wax is converted into light and heat energy. This is why the correct answer is 'light and heat', as sound is not a significant form of energy produced in this process.

Tags

NGSS.MS-PS1-2

Select the correct answer. Based on the law of conservation of energy, which statement is correct?

• Energy is always being added to all parts of the Universe.

• Energy is often destroyed in some parts of the Universe.

• Energy in a closed system cannot change forms.

• Energy in an isolated system remains constant.

Answer explanation

The law of conservation of energy states that in an isolated system, energy cannot be created or destroyed, only transformed. Therefore, the correct statement is that energy in an isolated system remains constant.

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After that, it's common for scientists to redesign the:

Answer explanation

After conducting an experiment, scientists often analyze the results and may redesign the experiment to improve accuracy or address any issues. This iterative process is essential for scientific progress.

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NGSS.MS-ETS1-3

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Select the volume units that are greater than one liter.

• centiliter

• milliliter

• megaliter

• kiloliter

• deciliter

Answer explanation

A megaliter (1,000,000 liters) and a kiloliter (1,000 liters) are both greater than one liter. In contrast, centiliters (0.01 liters), milliliters (0.001 liters), and deciliters (0.1 liters) are all less than one liter.

Electric energy to light energy: ________

Answer explanation

Electric energy can be converted into light energy, but the question asks for a direct relationship. The answer '0' indicates that there is no specific quantity of light energy produced from electric energy without additional context.

List the steps of the scientific method

d

e

f

c

b

a

Draw conclusions

Analyze results

Ask a question

Conduct experiment

Form a hypothesis

Communicate results

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NGSS.MS-PS2-2

The scientist tested his _______ by performing repeated _______.

• hypothesis - experiments

• hypothesis- data

• facts - experiments

• facts - observations

Answer explanation

The correct choice is 'hypothesis - experiments' because a scientist tests a hypothesis through repeated experiments to gather evidence and validate or refute the hypothesis.

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The scientist gathered all of the _______ before making a _______.

• particles - concept

• data - guess

• concepts - guess

• data - conclusion

Answer explanation

The correct choice is 'data - conclusion' because scientists collect data to analyze and draw conclusions, while 'guess' implies a lack of evidence, which is not suitable for scientific work.

Tags

NGSS.MS-LS1-5

NGSS.MS-PS1-2