Physical Science Concept Review Worksheets with Answer Keys

[Pages:123]Physical Science Concept Review Worksheets with Answer Keys

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Name

Class

Date

Skills Worksheet

Concept Review

Section: The Nature of Science

1. Name four branches of biological science.

2. Define the following terms: a. science

b. technology

c. scientific model

3. Describe the difference between a scientific law and a scientific theory.

4. Explain why it is important for scientists to be objective in their observations.

5. Explain why each of the following steps is important to scientific study. a. planning experiments

b. testing results

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

1

Introduction to Science

Name

Class

Date

Skills Worksheet

Concept Review

Section: The Way Science Works

1. Name three tools used by scientists, and describe how they are used.

2. Explain why an experiment should test only one variable at a time.

3. Convert the following measurements as indicated: ______________________ a. 95 cm to meters ______________________ b. 1.1 L to milliliters ______________________ c. 17 000 m to kilometers ______________________ d. 500 kg to grams ______________________ e. 2.55 mmol to moles 4. Explain why it is important that a hypothesis be stated so that it can be

modified.

5. Describe why prefixes are useful with SI units.

6. Explain why scientists use SI units instead of units such as inches and gallons.

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

2

Introduction to Science

Name

Class

Date

Skills Worksheet

Concept Review

Section: Organizing Data

1. Convert the following measurements from scientific notation to long form: ______________________ a. 2.54 103 cm ______________________ b. 9.5 104 km ______________________ c. 3.3 101 L ______________________ d. 7.445 102 g 2. Convert the following measurements to scientific notation: ______________________ a. 325 kg ______________________ b. 0.000 46 m ______________________ c. 7104 km ______________________ d. 0.0028 L 3. Find the number of significant digits in each of the following: ______________________ a. 0.003 26 ______________________ b. 39 010 ______________________ c. 77 900.1 ______________________ d. 1.5300 4. Identify the type of graph best suited to display the following:

a. the amount of iron ore in four different countries

b. the major gases found in Earth's atmosphere

c. the price of crude oil since 1990

5. Explain how results can be precise but not accurate.

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

3

Introduction to Science

Name

Class

Date

Skills Worksheet

Concept Review

Section: What Is Matter?

1. Classify the following as a homogeneous, O, or a heterogeneous, E, mixture.

a. a pail of sand and water

d. banana split

b. air

e. chocolate syrup

c. human blood 2. Compare and contrast atoms and molecules.

f. sea water

3. Explain the difference between a pure substance and a homogeneous mixture.

4. Classify each of the following as an element or a compound. a. benzene, C6H6 b. aluminum, Al c. aspirin, C9H8O4 d. titanium,Ti e. acetylene, C2H2 f. zinc, Zn

5. Explain why elements and compounds are pure substances.

6. Determine which of the following are pure substances and which are mixtures.

a. salt water

b. isopropyl alcohol, C3H8O c. mercury, Hg

d. ammonia, NH3 e. an egg yolk

f. honey

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

1

Matter

Name

Class

Date

Skills Worksheet

Concept Review

Section: Properties of Matter

1. Classify each of the following as a physical or chemical property of sulfur. ______________________ a. Its density is 2.97 g/cm3. ______________________ b. It reacts with hydrogen to form a gas. ______________________ c. It is a yellow solid. ______________________ d. Its melting point is 112?C. ______________________ e. It combines with oxygen. 2. Classify each of the following as a physical or chemical property of phosphorus. ______________________ a. It is a white, waxy solid. ______________________ b. It burns in air. ______________________ c. Its melting point is 44.1?C. ______________________ d. It has a density of 1.82 g/cm3. ______________________ e. Its boiling point is 280.3?C. 3. Explain how aluminum is a suitable material to use in making cans based on

its physical and chemical properties.

4. Calculate the mass of a sample of pure silver (density 10.49 g/cm3) that has a volume of 12.99 cm3.

5. Compute the density of an 820 g sample of pure silicon occupying a 350 cm3 container.

6. Describe how the characteristic properties of a piece of ice are different from its other properties.

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

2

Matter

Name

Class

Date

Skills Worksheet

Concept Review

Section: Changes of Matter

1. Categorize each of the following examples as a chemical or physical change.

____________ a. bending a metal rod ____________ d. painting wood

____________ b. burning wood

____________ e. cooking

____________ c. breaking glass

____________ f. burning propane

2. Explain why dissolving is a physical change.

3. Explain why baking is a chemical change.

4. Compare physical changes and chemical changes.

5. List 4 ways to detect that a chemical change has occurred.

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

3

Matter

Name

Class

Date

Skills Worksheet

Concept Review

Section: Matter and Energy

1. Identify each of the following as a gas, liquid, solid, or plasma.

_________________________ a. The particles are closely packed together, but they can still slide past each other.

_________________________ b. The particles are in a constant state of motion and rarely stick together.

_________________________ c. The particles are locked in fixed positions.

_________________________ d. The particles are broken apart. 2. Select the answer that best completes each statement describing the energy

transfers taking place as water changes state from solid to liquid, from liquid to gas, and from gas back to liquid. a. Energy must be added/released (choose one) to separate the water mole-

cules as ice melts. b. The fastest/slowest (choose one) moving molecules break away from the

surface of liquid water to form water vapor.

c. The process described in (b) is called _______________________. d. During the above process, energy is released/absorbed (choose one). e. Water molecules speed up/slow down (choose one) as water vapor returns

to the liquid water state.

f. The process described in (e) is called _______________________. g. Energy is released/absorbed (choose one) during the above process. 3. Apply the kinetic theory to describe the motion of particles in a homogeneous mixture of sugar and water as it is boiled.

4. Explain how mass and energy are conserved when water evaporates.

Copyright ? by Holt, Rinehart and Winston. All rights reserved.

Holt Science Spectrum

1

States of Matter

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