9.-Plants-and-their-Environment

Question 1

What is diffusion?

Answer 1

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

Question 2

What are molecules?

Answer 2

Molecules are two or more atoms bonded together.

Question 3

What is a concentration gradient?

Answer 3

A concentration gradient is the difference in concentration of a substance between two areas.

Question 4

What is a membrane?

Answer 4

A membrane is a thin layer that acts as a barrier between two environments.

Question 5

What is dynamic equilibrium?

Answer 5

Dynamic equilibrium is a state of balance where opposing processes occur at equal rates.

Question 6

What is Brownian motion?

Answer 6

Brownian motion is the random jiggling movement of particles suspended in a fluid.

Question 7

What factors affect plant growth and distribution?

Answer 7

Factors include environmental conditions, nutrient availability, and human impacts.

Question 8

What is trampling?

Answer 8

Trampling by humans or cattle can lead to an uneven distribution of plants.

Question 9

What is over-harvesting?

Answer 9

Over-harvesting depletes the soil of nutrients, making it difficult for plants to grow.

Question 10

How does pollution affect plants?

Answer 10

Pollution, such as acid rain, can make soils too acidic, harming plant growth.

Question 11

What are the effects of using chemicals on plants?

Answer 11

Chemicals like pesticides and fertilizers can affect plant growth and reduce biodiversity.

Question 12

What is habitat destruction?

Answer 12

Habitat destruction includes deforestation or land clearing for development or agriculture.

Question 13

What are monocultures?

Answer 13

Monocultures involve growing only one type of plant, depleting soil minerals essential for growth.

Question 14

What is the ideal pH range for most plants?

Answer 14

Most plants grow best in neutral or slightly acidic soil with a pH ranging between 4.5 and 7.5.

Question 15

Why is soil aeration important?

Answer 15

Soil aeration is important for respiration of plants and microorganisms, nutrient absorption, and disease prevention.

Question 16

What role does light intensity play in plant growth?

Answer 16

Sunlight is necessary for photosynthesis, and plants grow more quickly in summer with more sunlight.

Question 17

How does temperature affect plant growth?

Answer 17

Some plants thrive in cooler climates while others prefer warmer climates; extremes can hinder growth.

Question 18

Why is water important for plants?

Answer 18

Water is essential for survival, photosynthesis, and nutrient transport in plants.

Question 19

What happens if soils become water-logged?

Answer 19

Water-logged soils can cause roots to rot, killing the plant.

Question 20

How do plants adapt to water scarcity?

Answer 20

Plants like cacti have adaptations such as reduced leaves to minimize water loss.

Question 21

What are mineral ions?

Answer 21

Mineral ions are essential for healthy plant growth and are taken up by roots from the soil.

Question 22

What is random sampling?

Answer 22

Random sampling is used to avoid bias in selecting areas for studying plant distribution.

Question 23

What is a quadrat?

Answer 23

A quadrat is a square frame used in sampling to study plant distribution in a habitat.

Question 24

What are line transects?

Answer 24

Line transects are used for large habitats to record plants touching a stretched tape measure.

Question 25

What are point frames?

Answer 25

Point frames are used to estimate percentage cover of plants by recording those touching long needles.

Question 26

How does sample size affect research conclusions?

Answer 26

Larger habitats require more samples for valid conclusions, but time constraints may limit sampling.