Free Printable Unit 1-5 Practice Questions

1.

Water exists as a _____________ at 700 mmHg and 50 °C.

a)

solid

b)

liquid

c)

gas

d)

supercritical fluid

2.

Examine the atom of sodium (Na). Sodium has an atomic mass of 23. Select the correct model that represents the nucleus of an atom of sodium.

a)

b)

c)

d)

3.

The model represents a neutral silicon atom. Select the response that describes what would happen to the silicon atom if one electron was removed.

a)

The overall charge of the atom will become positive.

b)

The overall charge of the atom will become negative.

c)

The overall charge of the atom will not be affected.

d)

The atom will become a chlorine atom.

4.

An atom of gallium (Ga) has 31 protons and 39 neutrons. How many electrons does a neutrally charged atom of gallium have?

a)

70

b)

39

c)

31

d)

8

5.

Study the image and complete the statement below with its correct response.

At higher temperatures ______.

a)

particles in an object have less energy

b)

particles in an object move faster

c)

the energy of the particles remains the same

d)

the particles will move at a constant rate at any temperature

6.

What element is will have the most similar physical and chemical properties to the element Lithium (Li)?

a)

Sodium (Na)

b)

Magnesium (Mg)

c)

Beryllium (Be)

d)

Calcium (Ca)

7.

Noble gases are inert because ____. Select two answers!

a)

They are highly reactive

b)

They are unreactive

c)

They are noble

d)

They have 8 electrons in their outer most energy level

8.

Classify this matter shown.

a)

pure substance

b)

mixture of elements

c)

mixture of compounds

d)

mixture of elements and compounds

9.

Which two parts of the chemical reaction shown contains pure substances? Select two.

a)

Reactant 1

b)

Reactant 2

c)

Product

10.

Which is a molecule, but NOT a compound?

a)

hydrogen peroxide

H₂O₂

b)

iodine

I₂

c)

caffeine

C₈H₁₀N₄O₂

d)

methane
CH₄

11.

Which of the samples shown represents an element?

a)

b)

c)

d)

12.

Choose the chemical formula that best represents the model below.

a)

$CH_4+2O_2\ \rightarrow\ CO_2+2H_2O$

b)

$CH_7+4O_2\ \rightarrow\ 2O_2+7H_4$

c)

$2CH_4+2O_2\ \rightarrow\ 2CO_2+H_2O$

d)

$2CH_5+O_2\ \rightarrow\ 8CO_2+2H_2O$

13.

Analyze the model. Which process and in which structure would this most likely occur?

a)

Mitochondria-photosynthesis

b)

Mitochondria- cellular respiration

c)

Chloroplast- photosynthesis

d)

Chloroplast- cellular respiration

14.

The model shows the flow of matter between photosynthesis and cellular respiration. Which compounds should X and Y represent?

a)

$X\ =\ C_6H_{12}O_6\ ;\ Y\ =\ CO_2$

b)

$X\ =\ CO_{2_{ }};\ Y\ =\ C_{6_{ }}H_{12}O_6$

15.

Select THREE statements that correctly describes how carbon cycles from biotic and abiotic factors.

a)

Plants take in carbon from the atmosphere through photosynthesis.

b)

Decomposers take carbon from decaying materials and returns the nutrients to the soil.

c)

Deforestation and forest fires remove carbon from the atmosphere.

d)

Cows take in carbon from the atmosphere and converts it to food during photosynthesis.

e)

Cows release carbon into the atmosphere during the process of cellular respiration.

16.

Analyze the model. Which process and in which structure would this most likely occur?

a)

Mitochondria-photosynthesis

b)

Mitochondria- cellular respiration

c)

Chloroplast- photosynthesis

d)

Chloroplast- cellular respiration

17.

respiration breaking down sugars without oxygen

a)

anaerobic

b)

abiotic

c)

biotic

d)

buel

18.

Trace gases are small amounts of gases in the atmosphere such as water vapor, carbon dioxide, methane, nitrous oxide, and CFCs. When combined, the trace gases only make up 0.1% of Earth's atmosphere.

Which of the following actions would most likely increase the amount of trace gases in the atmosphere?

a)

A shoe manufacturer utilizing fossil fuels to power the factory.

b)

A group of friend traveling in the same car to their destination.

c)

A recycling company cleaning the plastic washed up in the shorelines.

d)

A family planting several oak trees in the backyard.

19.

Using the model, reorder the following gases in Earth's atmosphere from least to greatest.

a)

carbon dioxide

b)

oxygen

c)

nitrogen

1)

2)

3)

20.

Select three human activities that would decrease the amount of carbon dioxide emitted into the atmosphere.

a)

Traveling by bus, subway, or public transportation

b)

Buying more manufactured goods

c)

Sharing a ride with friends to go to a restaurant

d)

Installing solar panels

e)

Deforestation

Unit 1-5 Practice Questions

Total questions: 20

Worksheet time: 30mins

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