Desserts

Question 1

Deserts

Answer 1

Defined in terms of the amount of rainfall they receive, not temperature.

Question 2

How much of earths surface does the desert cover

Answer 2

They cover about 20% of Earth’s surface

Question 3

Desert rainfall

Answer 3

occur where rainfall is less than 20 inches (50 cm) per year.

Question 4

Desert temperature

Answer 4

Daily extremes in temperature result from exceptionally low humidity as water vapor tends to block solar radiation.

Question 5

Desert latitude

Answer 5

Most deserts are located between 15° and 35° north and south latitudes.

Question 6

Arctic tundra

Answer 6

A cold desert due to the low amount of rainfall it receives yearly.

Question 7

Succulents

Answer 7

Plants that have fleshy leaves or stems that store water.

Question 8

Cactus secrete toxins

Answer 8

into the soil to prevent interspecific completion.

Question 9

Wildflowers are dependent on water for

Answer 9

Germination;

Question 10

Succulents have deep roots to

Answer 10

tap groundwater;

Question 11

Succulents open

Answer 11

stomata at night;

Question 12

Succulents shallow roots

Answer 12

collect and store water after short rainfalls;

Question 13

succulents small surface areas

Answer 13

exposed to sunlight;

Question 14

succulents vertical orientation

Answer 14

to minimize exposure to the sun; and

Question 15

Succulents waxy leaves

Answer 15

minimize transpiration.

Question 16

Cactus life span

Answer 16

They have short life spans;

They perform their entire life cycle from seed to flower to seed within a single growing season; and

Question 17

Cactus store biomass in

Answer 17

seeds

Question 18

Desert animal size

Answer 18

Generally small

Question 19

Desert animals often

Answer 19

nocturnal.

Question 20

Deserts animals have

Answer 20

small surface areas.

Question 21

Desert animals

Answer 21

They spend time in underground burrows where it is cold.

Question 22

Aestivation

Answer 22

: A summer hibernation.

Question 23

Cactus sharp spines

Answer 23

create shade, reduce drying airflow, discourage herbivores and reflect sunlight.