Mix Review

Science olympiad grade 3 Worksheet-7

49. Which kind of soil has the most humus?

(A) red clay soil                             (B) sandy pond soil

(C) dark forest soil                       (D) bedrock

50. What kind of soil holds the most water?

(A) sandy soil    (B) clay              (C) rocks            (D) plants

Science olympiad grade 3 Worksheet-8

57. If you roll a large sheet of paper into a funnel, you can hear the sound better. (think of a megaphone) This process of increasing the loudness of sound is called.

(A) measuring a wave                 (B) Absorbtion

(C) reflection                                 (D) amplification

58. Being able to tell different sounds apart is called

(A) sound amplification              (B) sound discrimination