Science Assessment - Grade 8 - Preview

This booklet includes three full length practice assessments (forms A,B, and C).

The assessments each cover the State Standards.

assessments: forms A, B, & C CONTACT US E-Mail: jandj@educationalbootcamp.net Website: www.educationalbootcamp.net Phone: 305-423-1999 Office

305-423-1132 Fax

GRADE

8

CLASSIFIED

T H I S B O O K L E T B E L O NG S T O :

STUDENT’S NAME

Assessment - Form A Time allowed to completer this assessment is

140 minutes

2

4 The diagram below shows a sack of marbles of varying sizes on a classroom laboratory table. Use the marbles and the laboratory table to describe the relative sizes of the Earth, the Milky Way Galaxy, the Moon, and the Sun. Sack of Marbles Laboratory Table

Which object listed above would most likely be compared to the size of the Milky Way Galaxy?

A. B. C. D.

the small marble the medium sized marble the large marble the table

5 The table below lists the relative diameter of objects in the solar system.

However, the labels for the object being measured were mistakenly cut off.

Average Diameter of Objects in the Solar System 12,756 km

Sun Jupiter Milky Way Galaxy

1,392,000 km 142 984 km

Earth

Pluto

}

MISSING LABELS

6,796 km 2 306 km

Based on the table and the missing labels above, which of the following most likely represents the Earth?

A. B. C. D.

diameter = 2,306 km diameter = 12,756 km diameter = 142 984 km diameter = 1,392,000 km

4

6 The structures in our bodies work together and each performs a specific task.

The diagram below shows the hierarchy of structures within the human body.

?

A picture of which of the following structures belongs in the box above?

A. B. C. D.

organ neuron macromolecule organ system

7 The cell theory applies to all organisms, including the five shown below.

Euglena

Fungi

Cactus

Snail

Leopard

Study the images above. Which of the following statements best describes why these organisms are all examples of the cell theory?

A. B. C. D.

The organisms all have cells that lack a nucleus.

The organisms are all made up of one or more cells.

The cells in all the organisms perform exactly the same functions.

The organisms all have one cell.

5

32 The points labeled on the chart below show the approximate size of Earth, the Milky Way, the Moon, and the Sun. The approximate size of the solar system is also shown.

Solar System A B C D

100

102

104

106

108

1010

1012

1014

1016

1018

Which point on the cart best represents the approximate size of the Moon?

A. B. C. D.

Point A Point B Point C Point D

33 One of the physical properties of a star is apparent magnitude. Which of the following is used to determine the apparent magnitude of a star?

A. B. C. D.

The number of rotations a star makes.

The constellation the star is located in.

The distance of the star from the Earth.

The number of prominences the star makes.

34 When observed through a telescope, the surface of Mercury has many more craters than Earth. Which of the following statements below best explains why Mercury would have more craters than Earth?

A. B. C. D.

Mercury rotates faster than Earth.

Mercury has a smaller mass than Earth.

Mercury is much closer to the Sun than Earth.

Mercury has a thinner atmosphere than Earth.

15

Use the diagram below to answer questions 38 and 39.

The diagram below represents the Earth’s crust and interior layers.

38 Which evidence most likely led scientists to conclude that there are different layers within Earth’s interior?

A. B. C. D.

analysis of earthquake wave data rock samples taken from Earth’s core measurement of Earth’s diameter temperatures taken within each layer

39 Which Earth layer contains convection currents that are believed to be responsible for the movement of Earth’s tectonic plates?

A. B. C. D.

the crust the outer core the mantle the inner core

40 Which of the following represents the process by which air flows from one location in the atmosphere to another?

A. B. C. D.

radiation absorption convection conduction 17

Use the table below to answer questions 1 - 3.

Herman tested the effects of heat lost in an insulated cup of boiled water over time.

Below are the results of Herman’s investigation.

Temperature of Water (Non- Insulated Cup) 90ºC

80ºC

Temperature of Water (Insulated Cup)

70ºC

90ºC

80ºC

70ºC

Trial 1 1 min 24 sec

4 min 18 sec

12 min 21 sec Trial 1

5 min 53 sec

10 min 48 sec 30 min 17 sec

Trial 2 1 min 17 sec

4 min 16 sec

13 min 38 sec Trial 2

5 min 57 sec

10 min 36 sec 32 min 10 sec

Trial 3 1 min 19 sec

4 min 20 sec

15 min 32 sec Trial 3

5 min 58 sec

10 min 18 sec 31 min 57 sec

Trial 4 1 min 40 sec

5 min 2 sec

11 min 14 sec Trial 4

5 min 30 sec

10 min 57 sec 34 min 49 sec

Trial 5 1 min 34 sec

4 min 58 sec

10 min 59 sec Trial 5

5 min 74 sec

10 min 27 sec

33 min 7 sec

1 Which of the following correctly lists the number of trials that were conducted?

A. B. C. D.

3 trials 5 trials 8 trials 10 trials

2 Which of the following would most likely be the results of the experiment if Herman continued to measure the time it takes the water to reach 50ºC? A. The heat lost in the insulated cup would be the same as the heat lost in The non-insulated cup.

B. The heat lost in the insulated cup would be more than double that of the non-insulated cup.

C. The heat lost in the insulated cup would be less than half that of the non-insulated cup.

D. There would be no more heat lost from either cup.

3 Based on the data table above, which of the following do the results support?

A. B. C. D.

“Insulated cups do not conserve heat”.

“Heat conservation can not be measured”.

“Non-insulated cups conserve heat just as well as insulated cups”.

“Insulated cups conserve heat”.

25

23 A diagram of the carbon cycle is shown below.

Carbon Dioxide in Atmosphere

X Plants

Animals

Industry

Bacteria

Fossil Fuels

Each arrow represents a process in the carbon cycle. Which statement below best describes the process that occurs at arrow X? A. Bacteria breaks down molecules in animals into carbon-based soil nutrients.

B. Animals release oxygen that is used by bacteria to produce carbon dioxide.

C. Animals release carbon dioxide that is used by bacteria for growth and reproduction.

D. Bacteria combines carbon-based nutrients from plants and animals to produce glucose.

24 The diagrams below represent a plant and an animal cell.

Which part of the cell is labeled A in both diagrams?

A. B. C. D.

cell wall cytoplasm chromosome nucleus 33

28 The points labeled on the chart below show the approximate size of Earth, the Milky Way, the Moon, and the Sun. The approximate size of the solar system is also shown.

Solar System A B C D

100

102

104

106

108

1010

1012

1014

1016

1018

Which point on the chart best represents the approximate size of the Sun? A. B. C. D.

Point A Point B Point C Point D

29 One of the physical properties of a star is absolute brightness. Which of the following is used to determine the absolute brightness of a star?

A. B. C. D.

The number of rotations a star makes.

The constellation the star is located in.

The distance of the star from the Earth.

The apparent brightness of a star at a standard distance.

30 Which of the following statements below is an accurate description of similarities on Mars and on Earth?

A. Mars and the Earth both have volcanoes, canyons, and impact basins.

B. The atmosphere of both Mars and Earth consists of carbon dioxide and nitrogen.

C. Mars and Earth are gas planets.

D. Mars and Earth are the same distance from the Sun.

35

34 Which of the following best represents the thin layer of rock at the Earth’s surface?

A. B. C. D.

atmosphere lithosphere hydrosphere hemisphere

35 According to the diagram, what forms when sedimentary rock is exposed to heat and pressure?

A. B. C. D.

magma igneous rock sediments metamorphic rock

36 Which statement is the best example of heat transfer by conduction?

A. B. C. D.

Heat energy is transferred from the Sun to the Earth.

Heat energy is transferred from the bottom to the top of a lake.

Heat energy is transferred from the surface soil to the rocks below.

Heat energy is transferred from the Earth to the upper atmosphere.

37

37 Which of the following chemical compounds is most likely classified as a salt?

A. B. C. D.

NaCl NaOH NH4OH HCl

38 The data table listed below shows the speed of a jet plane over time.

How far did the tour bus travel in the first two seconds?

A. B. C. D.

5 miles 20 miles 10 miles 25 miles

39 Chloe tested several common house hold products using litmus paper. Chloe listed her results in the table below.

Which of the following is the most basic of the compounds that Chloe tested?

A. B. C. D.

vinegar acid rain shampoo pool water 38

Use the tables below to answer questions 6 and 7.

Students perform an investigation using the swings on a playground. One of the students sits on the swing and measures and records the results below.

SCIENTIFIC INVESTIGATION - PART 1 Swing

Chain Length (centimeters)

Number of Swings in 1 Minute

Angle of Release (degrees)

1

200 centimeters

20

90 degrees

2

240 centimeters

25

90 degrees

3

160 centimeters

15

90 degrees

SCIENTIFIC INVESTIGATION - PART 2

6

Swing

Chain Length (centimeters)

Number of Swings in 1 Minute

Angle of Release (degrees)

1

200 centimeters

40

45 degrees

2

240 centimeters

65

30 degrees

3

160 centimeters

15

90 degrees

Which variable was the independent variable in the Scientific Investigation Part 1?

A. B. C. D.

The chain length The angle of the release The number of swings The different swings

Which of the following is NOT a valid observation for Part 2 of the experimental 7 design?

A. The number of swings is dependent on the angle of release.

B. The number of swings is dependent only on the chain length.

C. The number of swings is dependent on both the angle of release and the chain length.

D. Two independent variables should not be tested at the same time.

47

8 The diagrams below are a depiction of the Earth 225 million years ago and the Earth during the present day.

Which of the following most likely caused the change in land mass over the past 225 million years?

A. B. C. D.

The changes that occur are due to movement of strong ocean currents.

The changes that occur are a result of weathering and erosion.

The changes that occur are a result of plate tectonic motion.

The changes to the Earth are caused by natural disasters.

9 A student experiments with an unknown substance to determine its properties.

Below are the results of the findings.

PROPERTY

RESULTS

Luster

Shiny

Melting Point

High

Density

13.6 g/cm3

Heat Conduction

Good

Ductile

Ductile

Malleable

Malleable

Which of the following is the conclusion that was most likely made?

A. B. C. D.

The substance is a liquid.

The substance is a gas.

The substance is a non-metallic solid.

The substance is a metallic solid.

48

37 Which of these organisms is most likely a producer in a marine ecosystem?

A. B. C. D.

fish gull algae worm

38 A scientist finds the bones of a dinosaur. Which of the following would best be used by the scientist to determine the approximate age of the dinosaur bones?

A. B. C. D.

The birds living in the area of the bones The weather conditions in the area of the bones The kinds of trees living in the area of the bones The index fossils in the area of the bones

39 An aluminum (metal) bar is submerged into two cups of water. The left side of the bar is placed in Cup A at an initial temperature of 100°C and the right side of the bar is placed in Cup B with an initial temperature of 0°C .

What is most likely happening to the temperature of the water?

A. B. C. D.

the temperature of the water in Cup A the temperature of the water in Cup B the temperature of the water in Cup A the temperature of the water in Cup A

57

is increasing is increasing drops to 0°C and Cup B remain the same

Periodic Table of Elements

62

This booklet includes three full length practice assessments (forms A,B, and C).

The assessments each cover the State Standards.

assessments: forms A, B, & C CONTACT US E-Mail: jandj@educationalbootcamp.net Website: www.educationalbootcamp.net Phone: 305-423-1999 Office

305-423-1132 Fax

GRADE

8

CLASSIFIED

T H I S B O O K L E T B E L O NG S T O :

STUDENT’S NAME