General Glossary

Question 1

Anaphase

Answer 1

The phase of mitosis in which the centromere splits apart and the chromatids are pulled to opposite sides of the cell by spindle fibres

(1.3)

Question 3

Angle of incidence (<i></i>

Answer 3

The angle between the incident ray and the normal in a ray diagram

(10.2)

Question 4

Albedo

Answer 4

The fraction of incident light or electromagnetic radiation that is reflected by the surface of an object such as from Earth back into space (for example, the extent of an objects ability to reflect sunlight)

(7.1)

Question 7

Alveoli

Answer 7

The tiny air sacs in the lungs where gas exchange occurs

3.2

Question 8

Anion

Answer 8

A negatively charged ion

4.1

Question 9

A compound that produces hydrogen ions when dissolved in water

Answer 9

Acid

6.1

Question 10

Anthropogenic

Answer 10

Relating to or resulting from the influence of humans

7.1

Question 11

Angle of reflection (

Answer 11

The angle between the reflected ray and the normal in a ray diagram

(10.2)

Question 13

Aorta

Answer 13

The main blood vessel carrying oxygenated blood from the heart to branch arteries that lead to the rest of the body

(3.2)

Question 14

Astigmatism

Answer 14

Blurred or distorted vision usually caused by a incorrectly shaped cornea

(12.3)

Question 15

Antacid

Answer 15

A substance capable of neutralizing an acid

6.3

Question 16

Atmosphere

Answer 16

A layer of gases that surrounds a planet or moon

7.1

Question 17

Axis of symmetry

Answer 17

A line that divides a shape into two congruent parts that can be matched by folding the shape in half

(12.1)

Question 18

Angle of refraction (

Answer 18

The angle between the normal and the refracted ray

11.1

Question 19

Anthropogenic greenhouse effect

Answer 19

The increased capacity of the atmosphere to absorb and prevent the escape of thermal energy because of an increase in greenhouse gases introduced by human activity

(8.2)

Question 20

Aerosols

Answer 20

Tiny particles, such as dust, salt and ash that are suspended in the atmosphere and scatter and reflect solar radiation.

(7.1)

Question 22

Antibodies

Answer 22

Specialized, disease-fighting proteins used by the immune system to bind specific antigens; some are always present in the body while others are produced in response to antigens.

(3.3)

Question 23

Apparent depth

Answer 23

An effect observed in water in which the image of an underwater object appears closer to the surface than the object actually is

(11.3)

Question 24

Antigen

Answer 24

Any material that stimulates an immune response in the body

3.3

Question 25

Activity Series

Answer 25

A list of elements organized to the chemical reactivity

The most reactive element appears at the top and the least reactive element appears at the bottom.

(5.2)