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WorksheetsUnit 1 Review`
Total questions: 55
Worksheet time: 42mins
Chemistry the study of (a) and the changes it undergoes.
The (a) is the step in the scientific method in which you use your 5 senses in order to define the problem.
Density is a (a) property of a substance.
(a) zeros are never significant.
Paper burning is an example of a (a) change.
(a) is a measure of the amount of matter in an object.
In a chemical equation the reactants are always written on the (a) side of the arrow.
(a) always have uniform and definite compositions.
Describe 3 differences between ice, liquid water, and steam.
You come home after work on Saturday, and although your family is always home at this time, you find the house empty upon your return. Describe how you would use the scientific method to determine where they are. Make sure you describe each step fully.
Hydrochloric acid (HCl) is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Phosphorous is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Sand and water is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Cake batter is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Vanilla ice-cream is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Boron is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Sodium chloride (NaCl) is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Granite rock is an example of a
element
compound
heterogeneous mixture
homogenous mixture
Burning paper is an example of a _________________________ change.
Physical
Chemical
Ripping paper is an example of a _________________________ change.
Physical
Chemical
Breaking a glass window is an example of a _________________________ change.
Physical
Chemical
Digesting food is an example of a _________________________ change.
Physical
Chemical
Boiling water is an example of a _________________________ change.
Physical
Chemical
Dissolving salt in water is an example of a _________________________ change.
Physical
Chemical
Pulverizing a rock is an example of a _________________________ change.
Physical
Chemical
Mixing salt and pepper is an example of a _________________________ change.
Physical
Chemical
Density is an example of a _________________________ property.
Physical
Chemical
"Tasteless" is an example of a _________________________ property.
Physical
Chemical
"Not combustable" is an example of a _________________________ property.
Physical
Chemical
"Not magnetic" is an example of a _________________________ property.
Physical
Chemical
"Reacts with sodium to produce sodium hydroxide and water" is an example of a _________________________ property.
Physical
Chemical
"Sweet smell" is an example of a _________________________ property.
Physical
Chemical
"Freezes at 0 degrees C" is an example of a _________________________ property.
Physical
Chemical
"Reacts violently with water" is an example of a _________________________ property.
Physical
Chemical
A 100 g mass is weighed three times on a balance and the following results are obtained: 95.0g, 94.9g, 95.1 g. Are these measurements accurate? Are they precise?
Accurate
Precise
Both accurate and precise
Precise, but not accurate
How many sig figs are in the number 128?
1
2
3
4
How many sig figs are in the number 0.00250?
3
4
5
6
How many sig figs are in the number 2050?
3
4
5
6
How many sig figs are in the number 0.135?
3
4
5
6
How many sig figs are in the number 10000?
1
3
5
7
How many sig figs are in the number 0.30?
1
2
3
4
How many sig figs are in the number 70.0?
1
2
3
4
How many sig figs are in the number 100.5?
1
2
3
4
How many sig figs are in the number 0.0020300?
1
3
5
7
How many sig figs are in the number 24.00000?
1
3
5
7
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
45,000 x 128,000
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
15,000,000,000 / 0.4317
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
0.000 032 x 0.0000007
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
3.145 + 2.1
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
65.7912 - 0.33
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
(1.22 x 10-13)/(3.445 x 106)
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
99.999 + 1
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
(3.1 x 108) x (4.792 x 105)
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
79.321 - 5.9218
(a)
What is the value of the following calculation with the correct number of sig figs. The answer can be in normal form or scientific notation:
000 000 000 02 / 0.00311
(a)
