Unit 1 Chapter 1 - Conditions Needed for Life on Earth

Question 1

Ambient gases

Answer 1

The surrounding environment of gases that are available to organisms

Question 2

Atmosphere

Answer 2

Gases surrounding the Earth. Different layers characterised by temperature, density and composition

Question 3

Biosphere

Answer 3

All the living organisms on Earth

Question 4

Enzyme Function

Answer 4

Enzymes are biological catalysts that have the ability to increase rate of chemical reaction

Question 5

Greenhouse Gas

Answer 5

A gas that absorbs infrared radiation and causes atmospheric heating

Question 6

Hydrosphere

Answer 6

All the water on Earth found in solid liquid or gaseous forms ie; oceans, rivers, lakes, living organisms, glaciers

Question 7

Lithosphere

Answer 7

Crust and upper layer of the Earth’s mantle

Question 8

Photolysis

Answer 8

Splitting of molecules by light, including water molecules in the early atmosphere, producing oxygen

Question 9

Physiological Function

Answer 9

Any substance involved in chemical reactions in a living organism has a physical function.

Question 10

Specific Heat Capacity

Answer 10

Measure of the amount of heat energy needed to heat up a particular mass of material through a particular temperature rise.

Question 11

Thermophilic

Answer 11

Heat-loving

Question 12

Transpiration

Answer 12

Loss of water by evaporation from the stomata of leaves