Grade3_2nd Q- Science Answer Key

GRADE3_2nd Q- SCIENCE I.

PLANTS: NEEDS/ CARE/ USES

A. DIRECTIONS: Fill in the blanks. Choose from the words in the box. photosynthesis

soil

animals

water

magnesium

minerals

leaves

roots

carbon dioxide

calcium

man

sunlight

1.

Plants need ___carbon dioxide_______ to live.

2.

Air, soil, ___sunlight___ and water are needed by plants to make their own food.

3.

A plant’s food factory can be found in its ___leaves_______.

4-5.

Soil is important to plants because it has __water_______ and ___minerals___ that plants need to grow.

6.8.

_Magnesium___, potassium and ___calcium____ are some of the minerals needed by plants.

9.

__Photosynthesis___ is the process of a plant making its own food.

10.

Plants absorb minerals from the soil through their _roots_____.

II. PARTS OF PLANTS/FUNCTIONS OF EACH PART A. DIRECTIONS: Write the letter of the part of the plant being referred to in each sentence. Choose your answer from the box. a. roots f. petiole

b. stems g. pollen grains

c. leaves h. sepal

d. fruits e. flower i. petals

__a____

1.

absorb water and minerals from the soil

__f____

2.

stem holding the leaf

__g___

3.

carried by insects for pollination

__e___

4.

most attractive part of a plant

__d___

5.

protect the seeds of the plant

2

__c___

6

where food is made and stored

II. LEAF: PARTS/CHARACTERISTICS A. DIRECTIONS: Encircle the letter of the correct answer. 1.

The outspread part of the leaf is the ___________________. a. b. c. d.

2.

_______________ is the arrangement of veins on leaves. a. b. c. d.

3.

vein blade margin midrib

Leaves are different in their ______________. a. b. c. d.

5.

Texture Venation Photosynthesis Margin

The ______________ of a leaf runs through its middle part and equally divides the leaf into half. a. b. c. d.

4.

blade margin petiole sepal

shapes sizes texture all of the above

The ______________ of a leaf may be smooth or jagged. a. b. c. d.

vein blade margin midrib

B. DIRECTIONS. Below are 10 different kinds of leaves. Classify them according to shape, edge, and venation (or vein pattern). Give 2 answers for each classification. Write the letter only.

3

SHAPE:

Narrow _____E_________ _____J_________

Broad ____A_____________ ____F_____________

MARGIN:

Smooth _____C_________ _____J_________

Jagged/Toothed ____A____________ ____H_/ I_________

VENATION:

Parallel _____J__________ _____C__________

Netted _____D___________ _____F___________

IV. ANIMALS: VERTEBRATES A. DIRECTIONS: Encircle the animal that does not belong in the group. Explain in a sentence why that animal does not belong in the group. 1.

hawk

platypus

nightingale

dog

All carnivores except nightingale, which is an insectivore. 2.

salamander

alligators

clownfish

snake

All carnivores except clownfish, which is an omnivore. 3.

alligator

newt

lizard

turtle

All reptiles except newt (amphibian). 4.

chicken

penguin

kiwi

dove

pilandok

echidna

gorilla

Only dove can fly. 5.

tamaraw

All give birth to live young, except the echidna (lays eggs). 6.

clownfish

toad

turtle

lizard

fruit bat

stag

All are omnivores except the toad (insectivore). 7.

tamaraw

dog

All have fur coverings, except the tamaraw (skin with hair). 8.

leopard

sea cow

gorilla

tarsier

4

All live on land except the sea cow. 9.

seahorse

clownfish

piranha

eel

All are carnivores except the clownfish (omnivore). 10.

caecilian

eagle

frog

toad

All are amphibians except the eagle B. DIRECTIONS: Complete the table. (15) Body Covering Breathes using

Gives birth Where to they live

Whale

Skin

Lungs

Live young

Sea

Classification according to what they eat Omnivore

Piranha

Scales

Gills

Eggs

Rivers

Carnivore

Toad

Skin

Lungs

Eggs

Land/water Insectivore

C. DIRECTIONS. Write T or F. T_______

1.

Amphibians are cold-blooded vertebrates.

F_______

2.

All mammals are carnivorous.

F_______

3.

Amphibians and fish use their lungs to breathe.

T_______

4.

All birds lay eggs.

T_______

5.

Some mammals live in the sea.

V. ANIMALS: INVERTEBRATES

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DIRECTIONS: Write a √ on the blank if the sentence is correct. If the sentence is incorrect, underline the word that makes it incorrect and write the correct word on the blank. __√_____

1.

A starfish is not a fish.

Butterflies

2.

Snails have two pairs of wings that produce brilliant and beautiful colors.

___√____

3.

Flatworms can enter a man’s body through dirty food and water.

Crabs

4.

Butterflies have joints that can bend.

___√____

5.

When a snail is touched, it draws in its tentacles.

Earthworm 6.

The roundworm is a common segmented worm that lives in the soil.

Vertebrates 7.

Invertebrates are animals with backbones.

___√____

8.

Crabs have hard outside covering and live mainly in water.

___√____

9.

Starfish move by sliding.

___√____

10.

Insects are the largest group of animals of invertebrates.