Physical Science Test #1 Review

These flashcards cover key concepts from the Physical Science Test #1 review lecture.

What are the two broad areas of science covered in Physical Science?

Physical science encompasses physics and chemistry.

What is the Scientific Method designed to do?

It is designed to systematically investigate phenomena, acquire new knowledge, or correct and integrate previous knowledge.

What are the steps of the Scientific Method?

1. Observation 2. Question 3. Hypothesis 4. Experiment 5. Analysis 6. Conclusion.

Why do we say 'multiple hypotheses'?

Because multiple hypotheses allow for a broader investigation of a phenomenon.

How do you distinguish between independent and dependent variables?

The independent variable is manipulated, while the dependent variable is measured in response to changes in the independent variable.

In the experiment investigating caffeine's effect on puppy heartbeat, identify the independent and dependent variables.

Independent variable: Caffeine; Dependent variable: Heartbeat of puppies.

In your study on room temperature and math test scores, identify the independent and dependent variables.

Independent variable: Room temperature; Dependent variable: Math test scores.

What is the value of 'standardized' units in science?

Standardized units ensure consistency and comparability of measurements.

Why is the metric system called the SI system?

SI stands for Système International d'Unités, reflecting its international standardization.

What is the metric system based on?

The metric system is based on powers of ten.

What are the base metric units for Time, Temperature, Length, Volume, and Mass?

Time: seconds; Temperature: Kelvin; Length: meters; Volume: liters; Mass: grams.

Convert 314 mg to grams.

314 mg = 0.314 g.

Convert 4 liters to milliliters.

4 L = 4000 ml.

Convert 18 ms to seconds.

18 ms = 0.018 seconds.

Convert 100 cm to meters.

100 cm = 1 m.

Convert 0.03 kg to grams.

0.03 kg = 30 grams.

What is 'tare'?

Tare refers to the weight of a container or packaging, excluded from the net weight of the contents.

Find the density of a cube with side measurements of 8 cm and a mass of 1536 grams.

Density = mass/volume = 1536 g / (8 cm)³ = 4.8 g/cm³. This object will sink.

In an experiment where an object displaces water in a graduated cylinder, if the mass is 30 grams and the water level rises from 5 ml to 20 ml, what is the density?

Density = mass/volume displaced = 30 g / 15 ml = 2 g/ml.