VANDA GRADE 3 PowerPoint for Vanda Science Competition

Past Year Paper for Vanda competition

1. VANDA GRADE 3

2. RULES

3. Section A

4. No. 1

5. No. 2

6. No. 3

7. No. 4

8. No. 5

9. Section B

10. No. 6

11. No. 7

12. No. 8

13. No. 9

14. No. 10

15. Section C

16. No. 11

17. No. 12

18. No. 13

19. No. 15

20. No. 16

21. No. 17 SIMULATION

22. No. 18 SIMULATION

23. No. 19

24. No. 20 When water boils, it turns into steam, which is an invisible gas. As the steam exits the kettle, it cools down when it comes into contact with the cooler air . This cooling causes the steam to condense back into tiny water droplets, which are visible as the white "clouds" you see.

25. No. 21 Which of the following explains why the Sun appears to move across the sky during the day? A) The Earth revolves around the Sun. B) The Sun revolves around the Earth. C) The Earth rotates on its axis. D) The Sun moves in the sky from east to west.

26. No. 22 A plant is placed in a dark room for several days. What will most likely happen to its leaves, and why? A) The leaves will turn yellow because the plant cannot make food without sunlight. B) The leaves will grow larger to find more light. C) The leaves will fall off because the plant needs more space. D) The leaves will stay green because the plant stores food.

27. No. 23 When you throw a ball into the air, it comes back down. Which of the following best explains why this happens? A) Air pushes the ball down. B) The ball loses energy. C) Gravity pulls the ball down. D) The weight of the ball increases.

28. No. 24 Why do polar bears have thick fur and fat layers? A) To protect them from other animals. B) To help them swim faster. C) To keep them warm in cold environments. D) To help them blend into their surroundings.

29. No. 25 Imagine you are building a model of the water cycle. Which of the following represents the process of condensation? A) A sponge soaking up water. B) A cup of water evaporating in the sun. C) Water droplets forming on the outside of a cold glass. D) A stream flowing into a river.

30. No. 26 If you add a teaspoon of sugar to a glass of water and stir it, the sugar disappears. Which statement best explains what happens to the sugar? A) The sugar is destroyed by the water. B) The sugar breaks into tiny pieces that spread out evenly in the water. C) The sugar floats on top of the water. D) The sugar sinks to the bottom of the glass.

31. No. 27 You observe a plant with small, needle-like leaves and thick stems. What environment is this plant most likely adapted to, and why? A) Rainforest, because the small leaves help it absorb more sunlight. B) Desert, because the small leaves reduce water loss and thick stems store water. C) Wetland, because the small leaves prevent the plant from sinking. D) Mountain, because the small leaves protect the plant from strong winds.

32. No. 28 Which of the following animals would be most affected by a sudden decrease in insect populations in a forest? A) Deer, because they eat plants. B) Frogs, because they feed on insects. C) Fish, because they live in water. D) Rabbits, because they eat fruits.

33. No. 29 In a pond ecosystem, frogs eat insects, and birds eat frogs. What might happen if there are fewer insects in the pond? A) The bird population will increase because they have more frogs to eat. B) The frog population will increase because they have less competition. C) The bird population will decrease because there will be fewer frogs to eat. D) The insect population will grow larger.

34. No. 30 Why does your heart beat faster when you run? A) To pump less blood because you are tired. B) To increase the supply of oxygen to your muscles. C) To cool your body down after running. D) To decrease the amount of energy your body uses.