Science olympiad grade 3 Worksheet-6

Science olympiad grade 3 Worksheet-6

41. What kind of soil do you think is in the desert?

(A) dark, damp soil                      (B) dry, sandy soil

(C) sticky, red soil                        (D) think, muddy soil

42. What happens when living things decompose?

(A) They grow healthy and strong.

(B) They have babies.

(C) They store up fat for the winter.

(D) Their parts break down into the soil.

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43. Which part of the soil has bits of dead plants and animals?

(A) roots            (B) humus         (C) clay              (D) bedrock

44. Which of the following sound sources would produce the LOUDEST SOUND?

(A) jet plane      (B) pin falling   (C) Doorbell      (D) whisper

45. Dinosaurs first evolved on earth about 300 million years ago.

(A) True             (B) False

46. Animals that eat other animals are called.

(A) carnivores  (B) omnivore    (C) herbivores  (D) predator

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47. What do sea jellies, earthworms, and spiders have in common?

(A) they all have 8 legs

(B) they all have stinging body parts

(C) they are all animals with backbones

(D) they are all animals without backbones

48. Which of these soils has the smallest grains of rock?

(A) red clay                                    (B) silt from a river

(C) sand at the beach                  (D) sand in a playground

Answer Keys

(41)–B; (42)–D; (43)–B; (44)–A; (45)–B; (46)–A; (47)–D; (48)–B