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Science Midterms > Measuring Matter > Flashcards

Measuring Matter Flashcards

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1
Q

What is the metric system?

A

Decimal measuring system based on the meter, liter, gram, second and degree as units of length, capacity (volume), mass, time, and temperature. It builds units using a basic unit and a set of prefixes.

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2
Q

Convert using the Unit Conversions chart:

1 m to ___cm

A

100 cm

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3
Q

Convert using the Unit Conversions chart:

320 m = _____cm

A

32,000 cm

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4
Q

Convert using the Unit Conversions chart:

4,500 mg = _____g

A

4.5 g

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5
Q

Convert using the Unit Conversions chart:

5g = _____mg

A

5,000 mg

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6
Q

Convert using the Unit Conversions chart:

4,500 mL = _____L

A

4.5 L

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7
Q

Convert using the Unit Conversions chart:

2,000 mg = ____ g

A

2g

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8
Q

Convert using the Unit Conversions chart:

5L = ____ mL

A

5,000 mL

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9
Q

Convert using the Unit Conversions chart:

16cm = _____mm

A

160 mm

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10
Q

Convert using the Unit Conversions chart:

104km = _______m

A

104,000 m

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11
Q

Convert using the Unit Conversions chart:

198g = ____kg

A

0.198 kg

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12
Q

Convert using the Unit Conversions chart:

2,500 m = ____km

A

2.5 km

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13
Q

Convert using the Unit Conversions chart:

75 mL = _____L

A

0.075 L

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14
Q 
Common Conversions: 
1 km = \_\_\_\_m 
1 m = \_\_\_\_\_cm
1 m = \_\_\_\_\_\_mm
1 cm = \_\_\_\_ mm
A

1 km = 1,000 m
1 m = 100 cm
1 m = 1,000 mm
1 cm = 10 mm

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15
Q

Convert using the Unit Conversions chart:

100 cm = ____m

A

1 m

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16
Q

Convert using the Unit Conversions chart:

47 mm = ___cm

A

4.7 cm

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17
Q

Convert using the Unit Conversions chart:

12.4 km = ____m

A

12,400 m

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18
Q

Convert using the Unit Conversions chart:

453 g = ____kg

A

0.453 kg

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19
Q

Convert using the Unit Conversions chart:

34 m = ____cm

A

3,400 cm

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20
Q

Convert using the Unit Conversions chart:

1cm = ____mm

A

10 mm

21
Q

Convert using the Unit Conversions chart:

50 g = ____mg

A

50,000 mg

22
Q

Convert using the Unit Conversions chart:

9.08L = _____mL

A

9.080 mL

23
Q

What is a triple-beam balance?

A

Instrument used to measure the mass of an object.

24
Q

What is mass?

A

The measure of how much matter is in an object

25
Q

What is weight?

A

Measure of the force of gravity on an object.

26
Q

What is volume?

A

The amount of space matter (solid, liquid, and gas) occupies

27
Q

How to find the value of the measuring line (scale) in a graduated cylinder?

A
  1. Subtract two neighboring numbers on the graduated cylinder.
  2. Count the lines between the two numbers (including the last numbers line in your total.)
  3. Divide the answer for step 1 by step 2
28
Q

What is Water Displacement?

A

Technique used to measure the volume of objects by calculating how much water the object displaces, or pushes aside when it is put in a sample of water. You determine the volume of an object by subtracting the volume of the water without the object from the new measurement of water volume with the object.

29
Q

What is density?

A

Measurement of how much mass is contained in a given volume.
To calculate: D = M/V
Units: g/cm^3 or g/mL
Density of water is 1.0 g/mL.

30
Q

The mass of copper is 145.8g and the volume is 15.625mL. What is the density? (g/cm^3)

A

9.3 g/cm^3

31
Q

The mass of aluminum is 44.4g and the volume is 15.625 mL. What is the density? (g/cm^3)

A

2.8 g/cm^3

32
Q

What is the density of a substance with a mass of 75g and a volume of 25mL?
Show formula:
Substitute #’s into the Formula:
Answer (remember correct units):

A 
D = M/V
D = 75/25
A = 3 g/mL
33
Q

A small block of wood floats on water. It has a volume of 50 cubic cm and a mass of 40 g. What is the density of the wood?

A

A = 0.8 g/cm^3

If it is less than 1.0 g/mL because that is the density of water it is correct.

34
Q

What is the density of a cube that has a mass of 25 g and a volume of 29.4 cubic cm?

A

A = 0.8503 = 0.9 g/cm^3

35
Q

A piece of wood that measures 3 cm by 6 cm by 4 cm has a mass of 80 g. What is the density of the wood? Will it float on water? Explain.

A

D = 1.11 g/cm^3
The piece of wood would not float. The density of water is 1.0 g/mL and the density of wood is more than that (1.0 < 1.11) and therefore would not float.

36
Q

A cup of “gold” colored metal beads was measured to have a mass of 425 grams. Using water displacement the volume of the beads was calculated to be 47.7 cubic cm. Given the following densities of common metals, identify what metal the beads are composed of.

Gold: 19.4 g/cm^3
Copper: 8.9 g/cm^3
Lead: 11.3 g/cm^3

A

D = 8.9 g/cm^3

The beads are copper

37
Q

An object has a density of 5 g/mL and a mass of 50 g. What is the volume?

A 
V = M/D 
V = 10 mL
38
Q

A sample of copper occupies a volume of 100 mL. The density of the piece is 8.92 mL. What is the mass of the sample of copper?

A

V * D = M

M = 892

39
Q

Which has greater density: A whole Hershey’s bar or half of a Hershey’s bar? Explain.

A

They both have the same density. Density measures the amount of matter in a given volume. It is not effected by how big the object is.

40
Q

While trying to determine the density of an object in a lab, a group of students used a triple beam balance to measure the mass of an object. The largest rider reads 100, the medium rider reads 30 and the smallest rider reads 1.8. The students then place the object into a graduated cylinder and observe the water levels rise from 50mL to 88 mL. Calculate the density of the object.

A

D = 3.468 = 3.47 g/mL

41
Q

Solve and if you were to put these into a graduated cylinder how would it be sorted from bottom up?
Orange juice: Mass = 18g. Density = 6 g/mL Volume = ____
Milk: Mass = 8g Volume = 2 mL Density = ____
Water: Mass = 15 g. Volume = 15 mL Density = _____
Corn oil: Volume: 6 mL Density = 6 g/mL. Mass = ______
Molasses: Mass = 21g Density = 7 g/mL. Volume = ______
Soy sauce: Volume = 7.5 mL Density = 2 g/mL. Mass= _____

A

Orange juice: Mass = 18g. Density = 6 g/mL Volume = 3 mL
Milk: Mass = 8g Volume = 2 mL Density = 4 g/mL
Water: Mass = 15 g. Volume = 15 mL Density = 1 g/mL
Corn oil: Volume: 6 mL Density = 6 g/mL. Mass = 30g
Molasses: Mass = 21g Density = 7 g/mL. Volume = 3 mL
Soy sauce: Volume = 7.5 mL Density = 2 g/mL. Mass= 15 g
Order is down up
1. Molasses
2. Orange juice
3. Corn oil
4. Milk
5. Soy sauce
6. Water

42
Q

What is the density of mercury if 270 g of mercury occupies a volume of 100 mL?

A

2.7 g/mL

43
Q

A block of wood, 3 cm on each side, has a mass of 27g. What is the density of the block?

A

1 g/cm^3

44
Q

An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2mL. The height of the water rose to 7 mL. If the mass of the stone was 25g, what was its density?

A

5 g/mL

45
Q

A 10 cm^3 sample of copper has a mass of 89.6g. What is the density of copper?

A

8.96 g/cm^3

46
Q

The cork has a mass of 0.8 g and a volume of 2 cm^3. What is the density? Will it float or sink?

A

0.4 g/cm^3

Float

47
Q

The rubber stopper has a mass of 15g and a volume of 12 cm^3. What is the density? Will it float or sink?

A

1.25 g/cm^3

Sink

48
Q 
Mystery metal A has a mass of 29.1 g and a volume of 4 cm^3. What is the density? Will it float or sink?
Which of these metals is it?
Aluminium: 2.71 g/cm^3
Gold: 19.32 g/cm^3 
Lead: 11.34 g/cm^3 
Nickel: 8.8 g/cm^3 
Zinc: 7.14 g/cm^3 
Copper: 8.93 g/cm^3
A

7.275 g/cm^3
Sink
Zinc

49
Q 
Mystery metal B has a mass of 18 g and a volume of 6 cm^3. What is the density? Will it float or sink?
Which of these metals is it?
Aluminium: 2.71 g/cm^3
Gold: 19.32 g/cm^3 
Lead: 11.34 g/cm^3 
Nickel: 8.8 g/cm^3 
Zinc: 7.14 g/cm^3 
Copper: 8.93 g/cm^3
A

3 g/cm^3
Sink
Aluminum

Science Midterms (12 decks)

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