science bio

Question 1

animals produce carbon dioxide and use up oxygen when they breath. how do plants benefit this

Answer 1

plants provide oxygen

Question 2

plants make their own food from water, carbon dioxide, and sunlight. what role is this ?

Answer 2

plants provide food

Question 3

plants protect other organisms from the weather and from predators. what role is this

Answer 3

plants provide shelter

Question 4

dead plant material builds soil. plants also prevent erosion, which is the process that moves soil from one place to another. what role is this?

Answer 4

plants build + protect soil

Question 5

______________________ are connected by what they eat.

Answer 5

all living things or organisms

Question 6

in what ways can plants be used as a resource

Answer 6

for food and for fibre

Question 7

what can plants be used as for fibre

Answer 7

for wooden frames (covered with sheets)

cloth

Question 8

whats a living resource

Answer 8

are things that can be used for human needs

Question 9

soil is made up of 2 type of particles, what are they

Answer 9

mineral particles (in organic) and organic particles

Question 10

what are the 3 types of soil?

Answer 10

sandy soil, clay soil, and loam soil

Question 11

describe sandy soil

Answer 11

runs between your fingers and has very few lumps. if you moisten sandy soil and squeeze it in your hands, the soil will not stay together.

Question 12

describe clay soil

Answer 12

feels slippery when wet. when you squeeze it, it will stay together and form a tight ball. dry clay is very hard.

Question 13

describe loam soil

Answer 13

crumbly like a moist cake. if you squeeze wet loam in your hand, it will form a loose ball. its not sticky

Question 14

why is it important for soil to have spaces between particles in soil

Answer 14

allows for oxygen gas and water to enter the soil

Question 15

Describe the purpose of fertilizer?

Answer 15

benefits the soil nutrients

Question 16

What is organic fertilizer?

Answer 16

comes from sources such as animals or plant waste

Question 17

What is chemical fertilizer?

Answer 17

mixture of chemicals that promote plant growth

Question 18

How can fertilizer be used improperly?

Answer 18

If not measured properly there can be too much nutrients, more than the plant can use. Extra, unused nutrients may dissolve in rain water and pollute the soil.

Question 19

What is irrigation?

Answer 19

Irrigation is the practice of applying water to crops

Question 20

How can improper irrigation be harmful?

Answer 20

too much water added to the soil, it will fill all he pores in the soil. With too little air in the soil plants will not grow well.

Question 21

What are the benefits to clearing the land for agriculture?

Answer 21

Make easy to plant seeds for crops. It also reduces competition between crop plants and other plants.

Question 22

What are the harmful effects of clearing the land for agriculture?

Answer 22

If not carefully done, it can expose soil to the weather. Without plant roots the soil will blow away.

Question 23

How does plowing benefit the soil?

Answer 23

breaks up the soil creating more air spaces and making it less compacted (room for plants to grow)

Question 24

Why is plowing harmful?

Answer 24

it makes the soil particles smaller and soil can become water logged and compacted more easily

Question 25

Describe the function of the noble blade and drill?

Answer 25

cuts below the ground while leaving the top stubble intact

Question 26

What is crop rotation?

Answer 26

planting a different crop in particular field every year

Question 27

What is the major benefit of crop rotation?

Answer 27

one plant uses the nutrients that the other doesn’t need