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# which statements describe density? check all that apply. density is a chemical property of an object. the density of an object is constant. density is a derived unit of measure. density is the sum of the mass and volume of an object. the density of an object determines whether it will sink or float.

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get which statements describe density? check all that apply. density is a chemical property of an object. the density of an object is constant. density is a derived unit of measure. density is the sum of the mass and volume of an object. the density of an object determines whether it will sink or float. from EN Bilgi.

## Which statements describe density? Check all that

Answer: is 5  because you use density is found by mass divide by volume..

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## Which statements describe density? Check all that apply.1-Density is a chemical property of an object.2-The density of an object is constant3-Density is a derived unit of measure.4-Density is the sum of the mass and volume of an object.5-The density of an object determines whether it will sink or float.

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Which statements describe density? Check all that apply.

1-Density is a chemical property of an object.

2-The density of an object is constant

3-Density is a derived unit of measure.

4-Density is the sum of the mass and volume of an object.

5-The density of an object determines whether it will sink or float.

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## Which statements accurately describe density? check all that apply. density is a derived unit of measurement. density

Correct answer ✅ to the question: Which statements accurately describe density? check all that apply. density is a derived unit of measurement. density is measured using only

## Which statements accurately describe density? check all that apply. density is a derived unit of measurement. density is measured using only a balance or scale. density is measured with units such as grams. density is the ratio of mass to volume. density is a physical property of an object.

Which statements accurately describe density? check all that apply. density is a derived unit of measurement. density is measured using only a balance or scale. density is measured with units such as grams. density is the ratio of mass to volume. density is a physical property of an object. Answers

The correct answer was given: scholar345

Density is a derived unit of measurement

Density is the ratio of mass to volume

Density is a physical property of an object

The correct answer was given: 18080980

Density is the mass of an object or substance per unit volume. The symbol for density is and it can be calculated using the formula as follows.

=

Density is derived from mass which can be in grams or kilograms and volume which can be in liters etc. Therefore, density is a derived unit of measurement. We do not need any balance or scale to determine the density.

The statements in the options that accurately describe density are as follows.

Density is the ratio of mass to volume.Density is a physical property of an object. Density is a derived unit of measurement.

The correct answer was given: Brain

d. temperate deciduous forest

The correct answer was given: Brain

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

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Which statements apply to density? check all that apply. > density is a chemical property of an object. > the density of an object is constant. > density is a derived unit of measure. > density is the sum of the mass and volume of an object. > the density of an object determines whether it will sink or float.

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## What is Density?

A 5E lesson plan from Middle School Chemistry

Middle School Chemistry

### big ideas about the very small

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## What is Density?

### Key Concepts

Density is a characteristic property of a substance.

The density of a substance is the relationship between the mass of the substance and how much space it takes up (volume).

The mass of atoms, their size, and how they are arranged determine the density of a substance.

Density equals the mass of the substance divided by its volume; D = m/v.

Objects with the same volume but different mass have different densities.

### Summary

Students will observe a copper and an aluminum cube of the same volume placed on a balance. They will see that the copper has a greater mass. Students will try to develop an explanation, on the molecular level, for how this can be. Students are then given cubes of different materials that all have the same volume. Students determine the density of each cube and identify the substance the cube is made from.

### Objective

Students will be able to calculate the density of different cubes and use these values to identify the substance each cube is made of. Students will be able to explain that the size, mass, and arrangement of the atoms or molecules of a substance determines its density.

### Evaluation

Download the student activity sheet, and distribute one per student when specified in the activity. The activity sheet will serve as the “Evaluate” component of each 5-E lesson plan.

### Safety

Make sure you and your students wear properly fitting goggles.

### Materials for Each Group

Cubes marked A–H that you will share with other groups

Balance that can measure in grams

Calculator

### Materials for the Demonstration

Copper cube and aluminum cube of the same volume

Balance

### Cubes

For this lesson, you will need a set of cubes of different materials that are all the same volume. These sets of cubes are available from a variety of suppliers. Flinn Scientific sells a Density Cube Set, Product #AP6058. This set comes with 10 cubes—4 metal, 3 plastic, and 3 wood. It is easier for students if you reduce the number to 8 by using all the samples of metal but only two wood and two plastic cubes. We suggest using the nylon (off-white, least dense) plastic cube and the PVC (gray, most dense) plastic cube. For the wood, we suggest using the oak (darker and most dense) and either the pine or poplar (paler, less dense). In the activity, each group will need to measure the mass of each of the eight cubes. Groups will need to measure and record their data for a cube and pass it along to another group until each group has used each of the cubes.

### Balances

Use a simple, plastic, two-sided balance that looks like a see-saw for the demonstration. One of the least expensive is Delta Education Primary Balance (21-inch) Product #WW020-0452. Have students use any balance that can measure in grams.

### Metric ruler

Students will use a metric ruler in the engage portion of the activity when they measure the length, width, and height of a cube along with you.

This is the first lesson in which students see models of molecules that are more complex than a water molecule. Some of these molecules may look a little intimidating. Let students know that they do not need to memorize or draw these molecules. For the purpose of this chapter, students only need to think about the size and mass of the atoms that make up the molecule and how they are arranged in the substance.

## Do a demonstration to show that cubes of the same volume but made of different metals have different masses.

### Question to investigate

Do cubes of exactly the same size and shape, have the same mass?

### Materials for the demonstration

Copper cube and aluminum cube of the same volume

Balance

### Procedure

Place the copper and aluminum cube on opposite sides of a simple balance.

### Expected results

The copper cube will have a greater mass than the aluminum cube.

## Lead a discussion about why the copper cube has a greater mass than the aluminum cube.

Tell students that both cubes are exactly the same size and both are solid with no hollow spots. Explain that the aluminum cube is made of only aluminum atoms and the copper cube is made of only copper atoms.