Science Ch 2 (Plants) - Revision

Question 1

All living things depend on this for food.

Answer 1

green plants

Question 2

The green colouring matter in green plants that enables them to make food is called…

Answer 2

chlorophyll

Question 3

Name some plants whose seeds are used for food.

Answer 3

wheat, corn, rice, sunflower, soy-bean

Question 4

Name some foods that come from the stem of the plant.

Answer 4

celery, rhubarb, potato

Question 5

Name some foods that come from the leaf of a plant.

Answer 5

lettuce, spinach, cabbage, watercress

Question 6

Name some foods that come from the root of the plant.

Answer 6

beetroot, carrot, sweet potato

Question 7

Name some foods that come from the flower of the plant.

Answer 7

broccoli, cauliflower

Question 8

Name some foods that come from the fruit of the plant.

Answer 8

apple, banana, berry

Question 9

How does oxygen get back into the air?

Answer 9

Plants give off oxygen during photosynthesis.

Question 10

What is photosynthesis?

Answer 10

Photosynthesis is the process by which green plants make food.

Question 11

Why do all living things depend on green plants for food?

Answer 11

Green plants are able to make food, something that no animal or human can do.

Question 12

List the three main parts of a tree, shown below.

Answer 12

1. Crown
2. Trunk
3. Roots

Question 13

Describe the crown of the tree.

Answer 13

The crown is the leaves and branches. Leaves make the food for the entire plant, and you will also find flowers or fruit at certain times of the year.

Question 14

Describe the trunk of a tree.

Answer 14

The trunk is made of woody fibres and is protected by a layer of bark.

Question 15

Describe the roots of a tree.

Answer 15

The roots are the part below the ground that anchor the tree and absorb water and minerals.

Question 16

What is an annual ring and what can it tell us?

Answer 16

An annual ring is the new layer of wood grown in a year. The age of the tree and the amount of rainfall of each year can be told by the annual rings.

Question 17

What are the three main groups of trees?

Answer 17

needleleaf

broad leaf

palms

Question 18

What are conifers?

Answer 18

Conifers are trees that bear cones.

Question 19

List four kinds of needleleaf trees and explain how to tell them apart.

Answer 19

pines - long, thin needles that grow in bundles of two to five

hemlocks - very short, flat needles growing on little stalks, dark green tops and sides, light green underneath

fir - single needles that grow directly on the twig; cones grow up from the top of the branch

spruce - short, four-sided needles that grown in spirals on the stalk; cones grow on the bottom side of the branch pointing down

Question 20

List six kinds of broadleaf trees.

Answer 20

oak

maple

ash

elm

walnut

willow

Question 21

What does deciduous mean?

Answer 21

falling down

Question 22

What controls the growth of a palm tree?

Answer 22

a bud in the centre of the crown

Question 23

List four kinds of palms.

Answer 23

raphia (raffia)

coconut

date

sabal

Washington

Question 24

What type of fruit is produced by an oak tree?

Answer 24

acorns

Question 25

What type of fruit is produced by a maple tree?

Answer 25

keys

Question 26

Name the parts of the flower indicated above.

Answer 26

10. petal
11. stamen
12. pistil
13. sepal

Question 27

Name two important jobs weeds do.

Answer 27

The root systems help prevent soil erosion and break up hard-packed soil.

Deep roots bring minerals that are deep in the earth up near the surface where other plants can use them.

Some are useful as medicines, dyes, or foods.

Produce seeds to feed birds.

Question 28

What do you call a plant that grows where it isn’t wanted?

Answer 28

a weed

Question 29

What are the three main parts of a seed and what job do they each do?

Answer 29

embryo (new plant)

stored food (nourishes the embryo)

seed coat (protects the embryo)

Question 30

Why will you never get cherries from radish seeds?

Answer 30

God designed seeds to produce after their own kind.

Question 31

Why is the stored food inside the seed important?

Answer 31

It must nourish the embryo until it is able to make its own food.

Question 32

Why are seeds designed to travel away from the parent plant?

Answer 32

If they didn’t, the taller plants would take most of the sunlight, water, and minerals in that spot, and they would not grow into strong, healthy plants.

Question 33

List three things that carry seeds away from the parent plant.

Answer 33

Any of: wind, water, animals, people

Question 34

What is unique about the way in which each of the following plants scatters its seeds?

(a) tumbleweed
(b) jewelweed
(c) dandelion
(d) flax

Answer 34

(a) tumbleweed: as it rolls across the prairies, it scatters its seed
(b) jewelweed: when the seed capsules are slightly touched, they burst open, scattering the seeds
(c) dandelion: each seed has downy hairs which enable it to float in the breeze
(d) flax: the seeds are covered with a sticky substance which allows them to hitch a ride on a passing animal

Question 35

What is a dormant seed?

Answer 35

One that is alive but not growing

Question 36

What does germinate mean?

Answer 36

to sprout

Question 37

What things must a seed have in order to germinate?

Answer 37

water

oxygen

the right temperature

Question 38

What part of the seed dies when the seed germinates and why?

Answer 38

the seed coat; because its job is finished

Question 39

Which part of the potato plant is poisonous?

Answer 39

leaves, sprouts, and spoiled parts

Question 40

Which part of the rhubarb plant is poisonous?

Answer 40

leaves

Question 41

Which part of the apple plant is poisonous?

Answer 41

seeds (in large quantities)

Question 42

Which part of the tomato plant is poisonous?

Answer 42

leaves and stems

Question 43

What is the name of the poison produced by the tobacco plant?

Answer 43

nicotine

Question 44

What is the best way to recognise poison ivy or poison oak?

Answer 44

look for leaflets in groups of three