MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

Your teacher gives you a small, jagged stone and asks you to calculate its mass and volume. Which instruments would you use in order to make the measurements?

a. microscope and graduated cylinder

b. graduated cylinder and triple beam balance

c. triple beam balance and ruler

d. ruler and microscope

Correct Answer: b

MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

Density can be calculated by dividing the mass of an object by its volume. Water has a density of 1 g/ml. If an object’s density is greater than 1 g/ml it will sink and if its density is less than 1 g/ml it will float.

Object A has a mass of 40 g and a volume of 30 ml and object B has a mass of 15 g and a volume of 20 ml. What will happen when both objects are placed in water?

a. Object A will float because its density is less than water.

b. Object B will sink because its density is greater than water.

c. Object A will sink because its density is greater than water.

d. Objects A and B will both float because their density is the same as water.

Correct Answer: c

MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

A group of students measured the mass of nickels and wrote down the year they were made. This data was collected. Use it to answer the question.

Date	Mass
1944	6.7 g
1954	7.0 g
1960	7.1 g
1967	7.4 g
1975	7.7 g
1982	8.2 g
1988	8.5 g
1992	9.0 g

b.

a.

d.

c.

Which of the graphs correctly displays the information collected?

a. a)

b. b)

c. c)

d. d)

Correct Answer: c

MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

A student has two objects. Object 1 has a mass of 10 g and a volume of 5 cm³. Object 2 has a mass of 100 g and a volume of 200 cm³. If both objects are placed in water, which will float and why?

a. Object 1 will float because it has less mass than object 2.

b. Object 1 will float because it is less dense than object 2.

c. Object 2 will float because it has more mass than object 1.

d. Object 2 will float because it is less dense than water.

Correct Answer: d

MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

A student placed an irregularly shaped rock in 100 ml of water in a graduated cylinder. The rock displaced the water by 50 ml. The student then weighed the rock and determined that its mass is 150 g. If the measuring unit of density is g/cm³, what is the density of this irregularly shaped rock?

a. 1.5 g/cm³

b. 3.0 g/cm³

c. 3.0 g/ml

d. 1.5 g/ml

Correct Answer: c

MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

Why does oil float on water?

a. Oil is less dense than water.

b. Water is less dense than oil.

c. Oil and water don’t mix.

d. Oil is more dense than water.

Correct Answer: a

MC	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

Your friend is building a model boat but is having problems getting it to float. You know that the density of water is about 1.0 g/ml. Together with your friend you find the mass of the boat to be 500 g and the volume to be 450 ml. Based on these measurements you tell your friend that he must reduce the mass of his boat by at least 50 grams. He reduces the mass by 80 grams and his boat now floats.

Which of these statements relates to this situation?

a. Science can be used by many people not just scientists.

b. Science can be used by scientists but not by most people.

c. Science is too complicated to be used to solve problems.

d. Science is not useful in everyday life.

Correct Answer: a

I	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

A student is given a sugar cube and the following equipment to use: metric ruler, triple beam balance, magnifying lens, microscope, beaker, magnifying lens, and water.

1. Describe 3 qualitative observations of the sugar cube and what instrument you would use.

2. Describe 3 quantitative observations and which instruments you would use.

Correct Answers:

1. Possible answers: the cube is hard, rough, sweet, made of tiny crystals (magnifying lens), dissolves in water (beaker and water).

2. Possible answers: ruler to measure length, width, height, and volume; balance to calculate the mass.

P	7^th Grade Integrated Science	Standard: 01
Objective: 02. Accurately measure the characteristics of matter in different states.
ILO:

Physical Properties of Matter Tasks

Note to the Teacher

Objective: Students will investigate several physical properties of matter: mass, volume, and density.

For this task students will be working on several lab activities. For each lab, the directions, lists of materials, etc. are clearly marked. Normal laboratory safety procedure should be followed.

Physical Properties of Matter Tasks

Task 1: Finding the mass of an object

Name __________________________________________ Period _______________________

Purpose: To use the balance and see if the date of pennies is related to their mass.

Materials: 20 pennies, balance

Safety precautions: Be sure to handle the balance carefully &follow your teacher's directions.

Procedure:

1. Do you think that all the pennies will have the same mass?

Yes

No

2.Record the date and mass (in grams) of each penny.

3.Graph your results.

Prediction: Will the mass of pennies change from year to year? How?

Record your data below:

Date

Mass

Date

Mass

Use the graph below to plot your data. Remember to correctly label your graph. Once all of your data is on the graph, draw a line that best connects to data points.