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Worksheets

Week 2

Total questions: 29

Worksheet time: 15mins

Name
Class
Date
1.

Why is chemistry important in the study of Anatomy & Physiology?

a)

It helps understand movement

b)

All anatomical structures and physiological processes are based on chemical reactions

c)

It explains how muscles contract

d)

It is used to classify different tissues

2.

What branch of chemistry focuses on explaining physiological and disease processes?

a)

organic chemistry

b)

Biochemistry

c)

physical chemistry

d)

analytical chemistry

3.

What is matter?

a)

Anything that has mass and occupies space

b)

Only solid objects

c)

a type of energy

d)

a gas that has no mass

4.

Which of the following is NOT a state of matter?

a)

solid

b)

liquid

c)

plasma

d)

energy

5.

What is the central part of an atom that contains protons and neutrons?

a)

electron cloud

b)

nucleus

c)

orbital shell

d)

molecule

6.

What charge does a neutron carry?

a)

positive

b)

negative

c)

no charge

d)

positive & negative

7.

What determines the atomic number of an element?

a)

number of neutrons

b)

number of protons

c)

number of electrons

d)

number of molecules

8.

Atomic weight is determined by:

a)

number of protons & electrons

b)

number of electrons only

c)

number of protons & neutrons

d)

number of atoms in molecule

9.

Isotopes are atoms of the same element that have:

a)

  1. The same number of protons but different numbers of neutrons

b)

  1. Different numbers of protons and electrons

c)

  1. The same atomic weight but different atomic numbers

d)

  1. The same number of neutrons but different numbers of electrons

10.

What type of bond forms when electrons are shared between atoms?

a)

  1. lonic bond

b)

  1. Covalent bond

c)

  1. Hydrogen bond

d)

  1. Metallic bond

11.

Which type of bond is formed when one atom transfers an electron to another atom?

a)

Covalent Bond

b)

Ionic bond

c)

Hydrogen bond

d)

Metallic bond

12.

What happens in a hydrogen bond?

a)

  1. Electrons are transferred between atoms

b)

  1. A weak attraction occurs between a slightly positive hydrogen and a slightly negative atom

c)

  1. Protons are shared between atoms

d)

  1. The outermost electron shell is filled

13.

What is a molecule?

a)

  1. The smallest unit of matter

b)

  1. Two or more atoms chemically combined

c)

  1. A single element

d)

  1. A charged particle

14.

A compound is formed when:

a)

  1. Two or more identical atoms combine

b)

  1. Two or more atoms of different elements chemically combine

c)

  1. A single atom splits into two

d)

  1. An atom loses electrons

15.

What is the molecular formula for water?

a)

  1. H2

b)

CO2

c)

H2O

d)

O2

16.

What do acids release in water?

a)

  1. Hydroxide ions

b)

  1. Sodium ions

c)

  1. Hydrogen ions

d)

  1. Oxygen molecules

17.

Substances that release ions in water and can conduct electricity are called:

a)

  1. Acids

b)

  1. Buffers

c)

  1. Electrolytes

d)

  1. Covalent compounds

18.

Bases are substances that:

a)

  1. Release hydroxide ions in water

b)

  1. Release hydrogen ions in water

c)

  1. Lower pH below 7

d)

  1. Do not conduct electricity

19.

What is the result of the reaction between an acid and a base?

a)

  1. A new acid

b)

  1. A stronger base

c)

  1. A salt and water

d)

  1. A covalent bond

20.

The pH scale measures the concentration of:

a)

  1. Hydroxide ions

b)

  1. Water molecules

c)

  1. Hydrogen ions

d)

  1. Electrons

21.

A pH of 7 is considered:

a)

Acidic

b)

Basic

c)

Neutral

d)

Alkaline

22.

Which pH value represents a strong acid?

a)

2

b)

7

c)

9

d)

13

23.

What happens when blood pH falls below
7.35?

a)

  1. The person experiences alkalosis

b)

  1. The person experiences acidosis

c)

  1. The blood becomes neutral

d)

  1. The pH remains unchanged

24.

Which of the following can cause alkalosis?

a)

  1. Vomiting acidic stomach contents

b)

  1. Diabetes

c)

  1. Impaired CO2 exhalation

d)

  1. Low oxygen levels

25.

What helps regulate pH levels in the body by resisting changes?

a)

Buffers

b)

Acids

c)

Bases

d)

Salts

26.

Normal blood pH is between:

a)

6.5-7.0

b)

7.35-7.45

c)

7.8-8.2

d)

5.0-6.5

27.

What happens to hydrogen ion concentration
as pH decreases?

a)

  1. It increases

b)

  1. It decreases

c)

It stays the same

d)

It becomes neutral

28.

A pH above 7 is considered:

a)

Acidic

b)

Neutral

c)

Basic (alkaline)

d)

Unstable

29.

What type of reaction occurs when an acid and a base neutralize each other?

a)

  1. Oxidation

b)

  1. Reduction

c)

  1. Neutralization

d)

  1. lonization

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