2. Balance Activity Solid, Liquid Or Gas?Game 1 Q2 Q1 (1) (2) Q3 (2) Solid, Liquid or Gas? Game 2 Q4 (4) Q5 (3) Solids, Liquids and Gases are matter. All matter have mass and occupy space. Liquids changes its shape according to the container. It also cannot be compressed. Air does not have a definite volume. No matter how much air is pumped in, it takes the volume of the ball which is 250 cm 3.

3. Q8 Q7 (1) (4) Q9 (4) Q10 (1) Q11 (2) Watch : Growth of A seedling The seed coat protects the seed. A fair test : one with mineral salts and the other without. The rest are the same. Seeds need water , warmth and food to germinate. Q6 (4) Video : Water takes up the space occupied by air Not all plants reproduce from seeds. Some plants reproduce from plant parts such as stems, leaves and even roots. Watch : Conditions for Seed Germination View : Table of Germinating times Of Seeds

4. Germination Table Parsnip Radish Seed Germinating Time Broccoli 6 -10 days Cabbage 6- 10 days Carrots 10 - 21 days Cauliflower 6 - 10 days Celery 10 -14 days Cucumber 7 - 10 days Parsnip 21-28 days Radish 5 - 8 days Sweet Corn 6 - 10 days Tomato 10 -14 days Onions 10 - 14 days Peas 7 - 10 days

5. Q14 Q13 (4) (2) Q15 (2) (2) Q16 View : Close up of Leaf Veins Living things need food, water and air to survive. Q12 (3) Quiz Time? Roots don’t absorb oxygen! Stems, not flowers, hold up the leaves. Video : Plant Parts and Functions View : How Grass prevents Soil Erosion

6. Q19 Q18 (4) (1) Q20 (1) Q17 (4) Only Plants can make their own food. View : Clay is a natural resource An apple is light, smooth and round. Outer casing of mobile phone should be strong light, waterproof and hard .

7. Q23 Q22 (2) (4) Q21 (2) Plastic is waterproof and durable (does not tear easily. It can also be easily folded (styrofoam cannot) View : Life Cycle of A Butterfly

8. Q25 (4) Q24 (2) (4) Tadpole does not resemble frog. Tadpole breathes with gills, but frog breathes with lungs. All life starts from fertilised eggs. Q26 (4) Windpipe is part of the respiratory system A B C 1 dog ✔ moth ✘ bird ✔ 2 horse ✔ frog ✔ cockroach ✔ 3 shark ✔ toad ✔ crocodile ✔ 4 guppy ✔ dragonfly ✔ squirrel ✘

9. Q29 Q28 (2) Q27 (2) Skeletal system gives the body shape and protects the inner organs. Blood vessels are tubes which transport blood, water, oxygen, food, etc in the body. (3) A B C D 1 food ✔ water ✔ carbon dioxide ✘ nutrients ✘ 2 water ✔ oxygen ✔ nutrients ✔ wastes ✔ 3 oxygen ✔ carbon dioxide ✘ food ✔ water ✔ 4 wastes ✘ food ✔ water ✔ carbon dioxide ✔

10. Q30 (4) When a person is swimming, he needs to breathe. His heart pumps more blood and his arm muscles work hard to move through the water.

11. Q32. Q33. Q34. (a) Alex (b) The mass remains the same i) Air can be compressed. ii) Air has no definite shape Q31. A : electricity B : Ball (definite shape) C : Tea (no definite shape) D : Wind (cannot be seen)

12. Q36. Q37. (A) leaf (B) roots (i) Part A makes food for the plant. (ii) Part B absorbs water from the ground Q35. (a) The aim is to find out if the amount of water given to seeds affect the amount of time taken for it to germinate (b) The roots would appear first food carrying tubes (phloem) water carrying tubes (xylem) (b) To all parts of the plant

13. Q39. Q40. (a) pupa, nymph (b) The butterfly has 4 stages in its life cycle but the cockroach has 3 stages. Q38. B ( gullet) C ( stomach) E : (small intestine) F : (anus) F (tadpole breathes through gills) T F (Frog’s eggs don’t need to be kept warm) T

14. Q42a. Q42b. (i) plant (ii) fungi Q41. A : Man-made/Synthetic B : Animals C : Wood/Rubber/Cotton/Latex/Paper D : Plastic/Glass/Rayon The living things in Group X can make their own food but the living things in the other groups cannot.