Deck 7: Physical Science Explorations: Density and Its Implications

Question 1

​The factors that change in an experiment are called ______________.

Answer 1

variables

Question 2

Mathematically defining density means the mass of an object is divided by its ____________.​

Answer 2

volume

Question 3

A metal with a greater density than silver, nickel, or iron is _____________.​

Answer 3

gold

Question 4

​An object floats in water when it is supported by:

A) ​a gravitational force.
B) ​an object that is more dense.
C) ​a buoyant force.
D) ​a normal force.

Question 5

Science curricula are constructed so that science topics, and the core concepts associated with them, pop up repeatedly in different grades. This is called:​

A) ​spiral curriculum.
B) ​vertical alignment.
C) ​horizontal alignment.
D) ​backwards design.

Question 6

Emerging relevance reminds us that relevance emerges through:​

A) ​teacher direction.
B) ​assessment.
C) ​teacher mediation.
D) ​evaluation.

Question 7

Water displacement is a procedure for measuring the _________of irregular objects.​

Question 8

Coke sinks in water while Diet Coke floats, because despite the equal sizes of the soda cans, there is a difference in ________.​

Question 9

​For objects that float, the mass of the displaced water is equal to the ____________of the object.

Question 10

For a fair test of the buoyancy of the wooden blocks, they must all be the same __________.​

Question 11

​During the sinking and floating experiment, the students try the experiment several ways, but each time the results are:

A) ​different.
B) ​the same.
C) ​varied.
D) ​different and varied.

Question 12

The person in a classroom science group who goes up to the board to enter the group's data in a chart is called the ___________.​

Question 13

​The constant in Ms. Drescher's "looking at liquids" experiment is the ______________of each liquid.

Question 14

​One gram per cubic centimeter represents the average density of ___________.

Question 15

The students in Mr. Hutcheon's class get the apples but not the raw potatoes to float in water because the potatoes have greater ____________ than the apples.​

Question 16

Density may also be defined as how closely packed are the __________of an object.​

Question 17

When the plasticine ball's shape was altered, its _______________ changed.​

Question 18

In sinking and floating, some materials can be sinkers and then changed to:​

A) ​become more dense.
B) ​floaters.
C) ​have more volume.
D) ​have less volume.

Question 19

A scientific measuring cup is called a(n) _____________________________.​

Question 20

​Objects float in water when their density is __________ than the density of water.

Question 21

In the textbook they described how science toys can be a design challenge: describe two other ways you could incorporate a design challenge in your classroom.

Question 22

Describe how a teacher can deepen discourse in her/his classroom.

Question 23

When an object floats, it does what to the water?​

A) ​soaks it up
B) ​pushes it up
C) ​replaces it

Question 24

​Some fruits float in water because:

A) ​they have air inside them.
B) ​they are mainly water.
C) ​they are small.
D) ​their density is greater than water.

Question 25

​A hard-boiled egg sinks in fresh water but floats in salt water because:

A) ​salt water has a greater buoyancy than fresh water.
B) ​the salt water repels the hard-boiled egg making it float.
C) ​the fresh water absorbs into the hard-boiled egg making it sink.
D) ​the salt water repels the egg, making it float, and the fresh water absorbs into the egg, making it sink.

Question 26

Describe the implications of the floating and sinking activities. To do so, you should make comparisons to other examples.

Question 27

A pumpkin floats in water but a grape sinks in water because:​

A) ​a pumpkin weighs less.
B) ​a grape weighs more.
C) ​a pumpkin is less dense.
D) ​a grape is smaller.

Question 28

Describe the ways Ms. Drescher creates trust in her classroom.

Question 29

Describe three stages of a student's learning progression and how you could help them move beyond that level.

Question 30

​To calculate the volume of a sinking object, students can:

A) ​measure the volume of the water in the container.
B) ​measure the volume of the water displaced by the object.
C) ​measure the mass of the water in the container.

Question 31

Discuss how the exploring liquids example describes a learning progression in fifth graders.

Question 32

Create an activity that combines mathematical computation in a science experiment.

Question 33

​Some liquids float on water because:

A) ​water repels other liquids.
B) ​they are less dense than water.
C) ​they are denser than water.
D) ​they weigh less.

Question 34

​To calculate the mass of a floating irregularly shaped object, students can calculate:

A) ​the mass of the displaced water.
B) ​the size of the object.
C) ​the volume of the water below the object.
D) ​the size of the water below the object.

Question 35

​The average density of water is:

A) 0.1 grams per cubic centimeter.​
B) ​1 gram per cubic centimeter.
C) ​10 grams per cubic centimeter.
D) ​1 kg per cubic centimeter.