Measurement, Motion & Density

Measurement, Density & Motion

Open Ended

Your instructor is speaking in a Zoom meeting. You see his lips moving, but you don't hear anything through your headphones.

H: Give ONE hypothesis to explain the lack of sound.

E: Suggest an experiment that you could conduct to test YOUR hypothesis.

Open Ended

You decide to do a science fair experiment to test the effect of light color on the growth rate of plants. What are some controls for your experiment?

Multiple Choice

Bobby did a science fair experiment to see the effect of music on the growth rate of plants.

He put 10 plants in the kitchen where there wasn't a stereo.

He put 10 other plants in the family room, where he played soft music 12 hours a day, with silence the remaining 12 hours.

Which of the answers below gives a reason why this wouldn't be a well-controlled experiment?

• You can't measure the EXACT height of the plants.

• He only played the stereo half the day.

• The 2 rooms receive different amounts of light.

• He had the same type of plants in each room.

Multiple Choice

You have a box containing exactly 1000 identical pins.

They are too small to register on a triple beam balance.

How could you find the mass of a single pin using nothing but one of our triple beam balances?

• Place all 1000 on the balance. Divide the reading by 1000

• Put a large weight on the balance with the pin. Subtract the mass of the object.

• Divide 1000 by the mass of the pins.

• Put the pin on the balance inside a graduated cylinder with water.

Multiple Choice

You measure the mass of all 1000 pins and find a total mass of 82.7 g.

To the proper number of sig figs, what is the mass of a single pin?

• 0.08 g

• 0.0827 g

• 10 g

• 12.1 g

• none of these is correct

Multiple Choice

The following measurements of a rectangular picture are taken:

Height = 29.5cm

Width = 53.52cm

(Showing the proper sig figs) - What is the area of the picture?

• 1580 cm

• 1580 cm²

• 1578.8 cm²

• 1578.84 cm

• none of these is correct

Multiple Choice

The following measurements of a rectangular picture are taken:

Height = 29.5cm

Width = 53.52cm

(Showing the proper sig figs) - What is the perimeter of the picture?

• 83.02 cm

• 166 cm

• 166.0 cm

• 166.04 cm

• none of these is correct

What is the temperature indicated by this metric thermometer?

You will answer on the next slide.

Multiple Choice

What is the temperature indicated by this metric thermometer?

(If your answer didn't include ⁰C, you would have lost points on a fill-in-the-blank test...)

• 85.2 ⁰C

• 85.25⁰C

• 87⁰C

• 87.4⁰C

• 87.50⁰C

What is the reading on this triple beam balance?

You will answer on the next slide.

Multiple Choice

What mass was registered by the balance on the previous slide?

• 272.1 g

• 272.09 g

• 272 g

• 270.21 g

What is the volume of the liquid in the graduated cylinder?

You will answer on the next slide.

Multiple Choice

What is an appropriate measurement of the volume on the previous slide?

• 21 ml

• 21.4 ml

• 22 ml

• 22.7 ml

What is the length of the pink rod, to an appropriate number of digits?

You will answer on the next slide.

Multiple Choice

What is a suitable measurement of the pink rod on the previous slide?

• 5.51 cm

• 5.512 cm

• 5.6 cm

• 5.62 cm

What is the mass of 10 cm³ of magnesium?

You will answer on the next slide.

Multiple Choice

What is the mass of 10 cm³ of magnesium?

• 17.3 g

• 17 g

• 5.7 g

• 20 g

Multiple Choice

What is the density of magnesium

• 0.578 g/cm³

• 0.573 cm³/g

• 1.73 g/cm³

• It varies.

This slide shows a beaker containing 5 substances.

Substances "a", "c" and "e" are solid, while substances "b" and "d" are liquids.

Which of the 5 substances is the densest?

You will answer on the next slide.

Multiple Choice

Which of the substances on the prior slide was the densest?

• a

• b

• c

• d

• e

Which of the 5 substances is the LEAST dense?

Answer on the next slide.

Multiple Choice

Which of the 5 substance on the last slide was the LEAST dense?

• a

• b

• c

• d

• e

If substance "d" is freshwater and substance "b" is gasoline (which has a density of 0.66 g/cm³), what density would be possible for substance "c"?

Answer on the next slide.

Multiple Choice

Which of these is a POSSIBLE density of substance "c"?

• 0.2 g/cm³

• 0.5 g/cm³

• 0.8 g/cm³

• 1.2 g/cm³

• 1.5 g/cm³

Multiple Choice

If a bug crawls 55 cm in 5 s, its average speed is

• 0.091 cm/s

• 1375 cm/s

• 11 cm/s

• 55 cm/s

• none of these is close

Multiple Choice

If I speed up from 10 mi/h to 30 mi/h in 2 seconds, my average acceleration is most nearly

• 10 mi/h/s

• 20 mi/h

• 40 mi/h/s

• 150 mi/h/s

• 600 mi/h/s

Which object, "A", "B" or "C," has the greatest velocity?

You will answer on the next slide.

Multiple Choice

Which object, "A", "B" or "C," has the greatest velocity?

• A

• B

• C

• They all have the same velocity.

• There's no way to tell velocity

Which object, "A", "B" or "C," has the lowest velocity?

You will answer on the next slide.

Multiple Choice

Which object, "A", "B" or "C," has the lowest velocity?

• A

• B

• C

• They all have the same velocity.

• There's no way to tell velocity

What is the velocity of object "B"?

Do your work with pencil and paper.

You will answer on the next slide.

Multiple Choice

What is the velocity of object "B"?

• 0.26 m/s

• 0.5 m/s

• 2.0 m/s

• 3.5 m/s

• 3.9 m/s

Multiple Choice

Which of the graphs below shows speeding up?

• none of them

Multiple Choice

Which of the graphs below shows zero speed?

• none of them

Multiple Choice

Which of the graphs below shows constant speed?

• none of them

Multiple Choice

Which of the graphs below shows slowing down?

• none of them

Multiple Choice

Which graph below best fits the following story?

A man was on his way to work, driving at a steady speed. Unfortunately it was too fast a speed and he got pulled over. The cop wrote him a ticket, and questioned him for 20 minutes. When he started driving again, he remembered that he had forgotten some papers at home and turned around, and drove the whole way back to his house at a steady speed.

Multiple Choice

A cat knocks a flowerpot off of a window ledge. The flower pot hits the ground 2.3 s later.

How fast is the flowerpot moving JUST before hitting the ground?

• 10 m/s

• 11.5 m/s

• 23 m/s

• 26.5 m/s

Multiple Choice

A cat knocks a flowerpot off of a window ledge. The flower pot hits the ground 2.3 s later.

How far did the flowerpot fall?

• 10 m

• 11.5 m

• 23 m

• 26.5 m

Benny Beeman raises bees. The table below gives the amount of honey his bees produced at different times when he had different numbers of beehives.

What is the independent variable?

Answer on the next slide.

Multiple Choice

What is the independent variable for the relationship on the previous slide?

• number of hives

• honey produced

• both

• neither

If this data is plotted on a 10x10 grid, what numbering system should be used for the number of hives - that is, each gridline should be worth...?

You will answer on the next slide.

Multiple Choice

If this data is plotted on a 10x10 grid, what numbering system should be used for the number of hives - that is, each gridline should be worth...?

• 2

• 2.1

• 2.5

• 3

• 5

If this data is plotted on a 10x10 grid, what numbering system should be used for honey produced - that is, each gridline should be worth...?

You will answer on the next slide.

Multiple Choice

If this data is plotted on a 10x10 grid, what numbering system should be used for honey produced - that is, each gridline should be worth...?

• 15.5

• 20

• 25

• 30

• 16

What correlation does the graph below indicate between ice cream sales and temperature?

Multiple Choice

What correlation does the graph below indicate between ice cream sales and temperature?

• positive

• negative

• none

Draw a best-fit line to the graph.

Draw a best-fit line to this graph.

Wilder has been watching too many Fast & Furious movies and accelerates from rest, with constant acceleration. He reaches a speed of 32 m/s after traveling 105 m.

Open Ended

Wilder has been watching too many Fast & Furious movies and accelerates from rest, with constant acceleration. He reaches a speed of 32 m/s after traveling 105 m.

Write 2 equations IN SYMBOLS that can be used to describe his motion:

Open Ended

Wilder has been watching too many Fast & Furious movies and accelerates from rest, with constant acceleration. He reaches a speed of 32 m/s after traveling 105 m.

List the 4 variables that appear in these equations:

If the value is known, give it (with units).

If it is NOT known, indicate this with a question mark.

Open Ended

Wilder has been watching too many Fast & Furious movies and accelerates from rest, with constant acceleration. He reaches a speed of 32 m/s after traveling 105 m.

Substitute your 2 known quantities (with units) from the LAST slide into the 2 equations on the slide before that.

Open Ended

Wilder has been watching too many Fast & Furious movies and accelerates from rest, with constant acceleration. He reaches a speed of 32 m/s after traveling 105 m.

Do algebra as needed to solve for the 2 unknowns in your equations.